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Shop By Brand

The Following brands are available based on your search.

  • ACDelco
    ACDelco
  • Delphi
    Delphi
  • Dorman
    Dorman
  • Genuine
    Genuine
  • Standard Ignition
    Standard Ignition
  • True Tech
    True Tech

Best Selling Genuine Gmc EGR Valves

  • We Stock the following top leading brands, including Delphi, Standard Ignition, True Tech, Dorman, ACDelco, Genuine
  • Constantly Updated Inventory of Gmc Replacement EGR Valve Parts

Delphi
1999 GMC C1500 EGR Valve 8 Cyl 5.0L Delphi

P311-0BD928A    EG10026  New

EGV589T , 17113618 , 8170963090 , 8-25180-481-0 , 1302042 , 8-17113-303-0 , 1302067 , 17204035 , EGR1273 , 2141038 , 12576918 , 1302057 , 4F1139 , 8-17096-309-0 , 17113806 , 130-2042 , 12568582 , 10516 , 8-17113-405-0 , 17113303 , 8251804810 , 8171134050 , 8125769180 , FE3233 , 2M1 , 2145070 , EGV606 , EGR1043 , 17113615 , 17114583 , 4F1088 , 130-2067 , 130-2104 , 17096309 , EGR1067 , 226154 , 2141043 , EGV589 , 17113619 , 8-12576-918-0 , 8171133030 , 2141080 , 2141042 , 2141065 , 1302100 , 130-2100 , 1302104 , 17113405 , 130-2057 , 2145071

Qty:
144.29
Delphi EGR Valve
  • EGR Valve
  • Product Attributes:
    • EGR Valve Type: Linear
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Engine VIN Block Engine CID CC
1999 - GMC C1500 M V 8 Cyl 5.0L 305 -
Delphi
1997 GMC Sonoma EGR Valve 4 Cyl 2.2L Delphi

P311-4CEEB20    EG10020  New

17200254 , 8170963060 , EGR1329 , 17115346 , 10518 , 8125780360 , EGR1272 , 8-17096-306-0 , 17096306 , EGV543 , 17113712 , 2145060 , FE3232 , 12578036 , 226208 , 4F1031 , 8-12578-036-0 , EGR1024

Qty:
166.98
Delphi EGR Valve
  • EGR Valve
  • Product Attributes:
    • EGR Valve Type: Linear
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Engine VIN Block Engine CID CC
1997 - GMC Sonoma 4 L 4 Cyl 2.2L 134 2190
Delphi
1994 GMC C2500 Suburban EGR Valve 8 Cyl 7.4L Delphi

P311-5C90F6D    EG10170  New

FE3206 , 17114577 , EGR1092 , EGV513 , EGV691 , 226129 , 12578040 , 2145058 , 17200258 , 10523 , EGR1043 , EGR1245 , 4F1088 , 17113301 , FE3052 , 17113713

Qty:
172.90
Delphi EGR Valve
  • EGR Valve
  • Product Attributes:
    • EGR Valve Type: Linear
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Aspiration Fuel Type Engine VIN Block Engine CID CC
1994 - GMC C2500 Suburban Naturally Aspirated GAS N V 8 Cyl 7.4L 454 -
Delphi
1995 GMC Safari EGR Valve Delphi

P311-031B39E    EG10031  New

FE3054 , 130508 , 17200269 , 226001 , 10524 , EGV515T , 4F1137 , EGR1044 , 17113533 , 2145593 , 17115340 , 12578043 , EGV515 , 130-508 , EGR1094

Qty:
121.61
Delphi EGR Valve
  • EGR Valve
  • Product Attributes:
    • EGR Valve Type: Linear
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle
1995 - GMC Safari
Delphi
1992 GMC C1500 EGR Valve 8 Cyl 5.7L Delphi

P311-3FD8850    EG10099  New

17087194 , FE3172 , EGR1470 , 17113371 , EGR126 , 34366 , 23055C , EGV627 , 17115187 , FE101D , 2145073 , EGR1213 , 23066C , EGV338 , 19210654 , 10501 , 4F1014 , 226370 , 17111851 , 2145369 , EGV627T , EGV672 , 30313 , 130226 , EGR101D , 130-226

Qty:
69.23
Delphi EGR Valve
  • EGR Valve
  • Product Attributes:
    • EGR Valve Type: Back Pressure
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Fuel Type Engine VIN Block Engine CID CC
1992 - GMC C1500 GAS K V 8 Cyl 5.7L 350 -
Delphi
1994 GMC Sonoma EGR Valve 6 Cyl 4.3L Delphi

P311-031B39E    EG10031  New

FE3054 , 130508 , 17200269 , 226001 , 10524 , EGV515T , 4F1137 , EGR1044 , 17113533 , 2145593 , 17115340 , 12578043 , EGV515 , 130-508 , EGR1094

Qty:
121.61
Delphi EGR Valve
  • EGR Valve
  • Optional
  • Product Attributes:
    • EGR Valve Type: Linear
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Engine VIN Block Engine CID CC
1994 - GMC Sonoma W V 6 Cyl 4.3L 262 -
Standard Ignition
1999 GMC K2500 EGR Valve 8 Cyl 5.7L Standard Ignition

P311-222962E    EGV589  New

EG10009 , 214-1080 , 8-17096-309-0 , 2-9157 , 214-1038 , 17113619 , 17096188 , 70-5542 , 8-12568-582-0 , 8-17113-405-0 , EG10026-11B1 , 17093020 , 214-5071 , 12568582 , 17113575 , 17113618 , EG10026 , 17096309 , 214-1960 , 214-5054 , EGR1043 , 17113303 , 8-17113-618-0 , 4F1403 , 10516 , 8-12576-918-0 , 8125685820 , 214-1042 , 17113615 , 17113405 , 214-5009 , 8-17113-303-0 , 8-17113-278-0 , 776-01631 , 19146117 , 214-5070 , 8-17200-276-0 , 911-164 , 70-6060 , 41528 , EGR1067 , 214-1065 , EGR1067VC , 8-17096178-1 , EG10175 , EGR1273 , 4F1139 , 2M1 , 17112996 , 8-25180-481-0 , 8170961781 , 130-2042 , 17113278 , 8-17096-188-0 , 12576918

Qty:
147.84
Standard Ignition EGR Valve
  • Exhaust Gas Recirculation Valve
  • Product Attributes:
    • Connector Gender: Female
    • Connector Shape: Oval
    • Digital/Mechanical: Electronic
    • Gaskets Included: Yes
    • Mounting Type: Bolt Mount
    • Number of Bolt Holes: 2
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Blade
  • Heavy-duty solenoids and stainless-steel valve components ensure durability. Alloy sensor contact ensures durability and proper performance. Includes gasket that is impregnated with graphite. Direct-fit replacement for ease of installation.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Block Engine CID CC
1999 - GMC K2500 V 8 Cyl 5.7L 350 -
Standard Ignition
1993 GMC C1500 EGR Valve 6 Cyl 4.3L Standard Ignition

P311-222962E    EGV589  New

EG10009 , 214-1080 , 8-17096-309-0 , 2-9157 , 214-1038 , 17113619 , 17096188 , 70-5542 , 8-12568-582-0 , 8-17113-405-0 , EG10026-11B1 , 17093020 , 214-5071 , 12568582 , 17113575 , 17113618 , EG10026 , 17096309 , 214-1960 , 214-5054 , EGR1043 , 17113303 , 8-17113-618-0 , 4F1403 , 10516 , 8-12576-918-0 , 8125685820 , 214-1042 , 17113615 , 17113405 , 214-5009 , 8-17113-303-0 , 8-17113-278-0 , 776-01631 , 19146117 , 214-5070 , 8-17200-276-0 , 911-164 , 70-6060 , 41528 , EGR1067 , 214-1065 , EGR1067VC , 8-17096178-1 , EG10175 , EGR1273 , 4F1139 , 2M1 , 17112996 , 8-25180-481-0 , 8170961781 , 130-2042 , 17113278 , 8-17096-188-0 , 12576918

Qty:
147.84
Standard Ignition EGR Valve
  • Exhaust Gas Recirculation Valve
  • ; Electronic Control
  • Product Attributes:
    • Connector Gender: Female
    • Connector Shape: Oval
    • Digital/Mechanical: Electronic
    • Gaskets Included: Yes
    • Mounting Type: Bolt Mount
    • Number of Bolt Holes: 2
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Blade
  • Heavy-duty solenoids and stainless-steel valve components ensure durability. Alloy sensor contact ensures durability and proper performance. Includes gasket that is impregnated with graphite. Direct-fit replacement for ease of installation.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Transmission Block Engine CID CC
1993 - GMC C1500 Automatic V 6 Cyl 4.3L 262 -
Standard Ignition
1993 GMC Safari EGR Valve 6 Cyl 4.3L Standard Ignition

P311-222962E    EGV589  New

EG10009 , 214-1080 , 8-17096-309-0 , 2-9157 , 214-1038 , 17113619 , 17096188 , 70-5542 , 8-12568-582-0 , 8-17113-405-0 , EG10026-11B1 , 17093020 , 214-5071 , 12568582 , 17113575 , 17113618 , EG10026 , 17096309 , 214-1960 , 214-5054 , EGR1043 , 17113303 , 8-17113-618-0 , 4F1403 , 10516 , 8-12576-918-0 , 8125685820 , 214-1042 , 17113615 , 17113405 , 214-5009 , 8-17113-303-0 , 8-17113-278-0 , 776-01631 , 19146117 , 214-5070 , 8-17200-276-0 , 911-164 , 70-6060 , 41528 , EGR1067 , 214-1065 , EGR1067VC , 8-17096178-1 , EG10175 , EGR1273 , 4F1139 , 2M1 , 17112996 , 8-25180-481-0 , 8170961781 , 130-2042 , 17113278 , 8-17096-188-0 , 12576918

Qty:
147.84
Standard Ignition EGR Valve
  • Exhaust Gas Recirculation Valve
  • ; with Calif. Emissions
  • Product Attributes:
    • Connector Gender: Female
    • Connector Shape: Oval
    • Digital/Mechanical: Electronic
    • Gaskets Included: Yes
    • Mounting Type: Bolt Mount
    • Number of Bolt Holes: 2
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Blade
  • Heavy-duty solenoids and stainless-steel valve components ensure durability. Alloy sensor contact ensures durability and proper performance. Includes gasket that is impregnated with graphite. Direct-fit replacement for ease of installation.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Engine VIN Block Engine CID CC
1993 - GMC Safari Z V 6 Cyl 4.3L 262 -
True Tech
1992 GMC K2500 EGR Valve 8 Cyl 5.7L True Tech

P311-09C684D    EGV627T  New

EG10099 , 17113371 , 4F1014 , 8C9 , 214-5073 , 70-5607 , EG10118 , EGR126

Qty:
49.05
True Tech EGR Valve
  • Exhaust Gas Recirculation Valve
  • ; GVW Under 8,500 Lbs.
  • Product Attributes:
    • Digital/Mechanical: Mechanical
    • Gaskets Included: Yes
    • Mounting Type: Bolt Mount
    • Notes: Complete Assembly
    • Vacuum Port Quantity: 1
  • Standard┬« T-Series EGR valves rotate 360┬░ and along with the necessary washers they accommodate multi-fit applications. Made from quality components for dependability.
Brand: True Tech
Additional Fitment Information:
Vehicle Block Engine CID CC
1992 - GMC K2500 V 8 Cyl 5.7L 350 -
True Tech
1991 GMC Jimmy EGR Valve 8 Cyl 5.7L True Tech

P311-09C684D    EGV627T  New

EG10099 , 17113371 , 4F1014 , 8C9 , 214-5073 , 70-5607 , EG10118 , EGR126

Qty:
49.05
True Tech EGR Valve
  • Exhaust Gas Recirculation Valve
  • Product Attributes:
    • Digital/Mechanical: Mechanical
    • Gaskets Included: Yes
    • Mounting Type: Bolt Mount
    • Notes: Complete Assembly
    • Vacuum Port Quantity: 1
  • Standard┬« T-Series EGR valves rotate 360┬░ and along with the necessary washers they accommodate multi-fit applications. Made from quality components for dependability.
Brand: True Tech
Additional Fitment Information:
Vehicle Block Engine CID CC
1991 - GMC Jimmy V 8 Cyl 5.7L 350 -
True Tech
1990 GMC C1500 EGR Valve 8 Cyl 5.0L True Tech

P311-09C684D    EGV627T  New

EG10099 , 17113371 , 4F1014 , 8C9 , 214-5073 , 70-5607 , EG10118 , EGR126

Qty:
49.05
True Tech EGR Valve
  • Exhaust Gas Recirculation Valve
  • ; with High Altitude Emissions with Federal Emissions
  • Product Attributes:
    • Digital/Mechanical: Mechanical
    • Gaskets Included: Yes
    • Mounting Type: Bolt Mount
    • Notes: Complete Assembly
    • Vacuum Port Quantity: 1
  • Standard┬« T-Series EGR valves rotate 360┬░ and along with the necessary washers they accommodate multi-fit applications. Made from quality components for dependability.
Brand: True Tech
Additional Fitment Information:
Vehicle Block Engine CID CC
1990 - GMC C1500 V 8 Cyl 5.0L 305 -
Dorman
1996 GMC C1500 EGR Valve 8 Cyl 5.7L Dorman

P311-4017B6A    W0133-1683597  New

Qty:
242.58
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - GMC C1500 V 8 Cyl 5.7L 350 -
Dorman
1993 GMC Safari EGR Valve Dorman

P311-4017B6A    W0133-1683597  New

Qty:
242.58
  • ; with California Emissions (RPO NB2)
Brand: Dorman
Additional Fitment Information:
Vehicle Engine VIN
1993 - GMC Safari Z
ACDelco
2005 GMC Sierra 3500 EGR Valve 8 Cyl 6.6L ACDelco

P311-58D4607    W0133-1763989  New

Qty:
420.64
ACDelco EGR Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2005 - GMC Sierra 3500 V 8 Cyl 6.6L 403 6599
Genuine
2010 GMC Sierra 2500 HD EGR Valve 8 Cyl 6.6L Genuine

P311-2F16393    W0133-1887906  New

Qty:
411.78
Genuine EGR Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Genuine
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - GMC Sierra 2500 HD V 8 Cyl 6.6L 403 6599
Delphi
1993 GMC Safari EGR Valve Delphi

P311-0BD928A    EG10026  New

EGV589T , 17113618 , 8170963090 , 8-25180-481-0 , 1302042 , 8-17113-303-0 , 1302067 , 17204035 , EGR1273 , 2141038 , 12576918 , 1302057 , 4F1139 , 8-17096-309-0 , 17113806 , 130-2042 , 12568582 , 10516 , 8-17113-405-0 , 17113303 , 8251804810 , 8171134050 , 8125769180 , FE3233 , 2M1 , 2145070 , EGV606 , EGR1043 , 17113615 , 17114583 , 4F1088 , 130-2067 , 130-2104 , 17096309 , EGR1067 , 226154 , 2141043 , EGV589 , 17113619 , 8-12576-918-0 , 8171133030 , 2141080 , 2141042 , 2141065 , 1302100 , 130-2100 , 1302104 , 17113405 , 130-2057 , 2145071

Qty:
144.29
Delphi EGR Valve
  • EGR Valve
  • with California Emission System
  • Product Attributes:
    • EGR Valve Type: Linear
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Engine VIN
1993 - GMC Safari Z
Delphi
1990 GMC K2500 EGR Valve 8 Cyl 5.0L Delphi

P311-3FD8850    EG10099  New

17087194 , FE3172 , EGR1470 , 17113371 , EGR126 , 34366 , 23055C , EGV627 , 17115187 , FE101D , 2145073 , EGR1213 , 23066C , EGV338 , 19210654 , 10501 , 4F1014 , 226370 , 17111851 , 2145369 , EGV627T , EGV672 , 30313 , 130226 , EGR101D , 130-226

Qty:
69.23
Delphi EGR Valve
  • EGR Valve
  • Except California
  • Product Attributes:
    • EGR Valve Type: Back Pressure
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Fuel Type Engine VIN Block Engine CID CC
1990 - GMC K2500 GAS H V 8 Cyl 5.0L 305 -
Delphi
1993 GMC K1500 EGR Valve 8 Cyl 5.7L Delphi

P311-3FD8850    EG10099  New

17087194 , FE3172 , EGR1470 , 17113371 , EGR126 , 34366 , 23055C , EGV627 , 17115187 , FE101D , 2145073 , EGR1213 , 23066C , EGV338 , 19210654 , 10501 , 4F1014 , 226370 , 17111851 , 2145369 , EGV627T , EGV672 , 30313 , 130226 , EGR101D , 130-226

Qty:
69.23
Delphi EGR Valve
  • EGR Valve
  • without Close Coupled Exhaust
  • Product Attributes:
    • EGR Valve Type: Back Pressure
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Fuel Type Engine VIN Block Engine CID CC
1993 - GMC K1500 GAS K V 8 Cyl 5.7L 350 -
Delphi
1994 GMC C2500 EGR Valve 8 Cyl 5.7L Delphi

P311-3FD8850    EG10099  New

17087194 , FE3172 , EGR1470 , 17113371 , EGR126 , 34366 , 23055C , EGV627 , 17115187 , FE101D , 2145073 , EGR1213 , 23066C , EGV338 , 19210654 , 10501 , 4F1014 , 226370 , 17111851 , 2145369 , EGV627T , EGV672 , 30313 , 130226 , EGR101D , 130-226

Qty:
69.23
Delphi EGR Valve
  • EGR Valve
  • Under 8,500lb GVW
  • Product Attributes:
    • EGR Valve Type: Back Pressure
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Aspiration Fuel Type Engine VIN Block Engine CID CC
1994 - GMC C2500 Naturally Aspirated GAS K V 8 Cyl 5.7L 350 -

Latest Car Advice

CarJunky AutoAdvice

1995 gmc sierra stumbles when accelerating

Showing 5 out of 12 Posts | Show 7 Hidden Posts
Question From truck driver on 1995 gmc sierra stumbles when accelerating

i have a 5.7 350 tbi in this truck w/123000 miles engine stumbles when light pressure is applied on go pedal but give it just a little more and she goes just fine runs great other wise no service engine soon light some things i did right before i noticed this problem were put stp fuel system cleaner in gas tank and replaced egr valve

Response From Hammer Time

Did you use a Delco EGR?
You might want to test for a glitch in the TPS.

Response From truck driver


Did you use a Delco EGR?
You might want to test for a glitch in the TPS.
not sure had a local shop do it good guys i know and trust also how do i check throttle position sensor

Response From truck driver

turned out to be the aftermarket egr valve put on a delco truck runs great i hope this info can help someone in the future

Response From Tom Greenleaf

Thanks Truck Driver for telling what the problem was and yes it will help someone else,

Tom

Response From Sidom

Just for the heck of it, disconnect the vacuum line from the EGR valve & take if for a spin and see if there is any difference

Response From truck driver

took vac line off runs great but service light comes on im taking the truck back to the shop who put the new valve on

Response From Discretesignals

Make sure that they check the EGR vacuum modulator and vacuum lines too. Funky vacuum signal to the EGR valve could be a possibility also.

Response From truck driver

me and my mechanic checked the vacuum off the egr solonoid and it wasnt right got to to take it back in the morning he is going to chase it down did not have time today what could this mean

Response From Sidom Top Rated Answer

What did you mean by "the vacuum wasn't right"?

Doesn't sound to serious, either a bad solenoid. If it was an AM EGR valve, some of those come with an assortment of different sized orfice washers. It's possible that maybe a too large of washer was installed...

But sounds like you are in good hands, I'm sure your guy will get a handle on it & it be back up to 100%

Response From truck driver

i will let yall know what the outcome is thanks for the info i dont know what the vac reading was but he said it wasnt what it was supposed to be

Response From Hammer Time

Vacuum line? Wouldn't it be electric?

1993 gmc uhaul

Showing 2 out of 19 Posts | Show 17 Hidden Posts
Question From prolube on 1993 gmc uhaul

im working on a 1993 gmc uhaul 454. it has very erratic idle and dies when put under a load. ive replace fuel pump + filter, distributor, plugs, cap, rotor, wires, map sensor, iac valve but it still does the same thing, it seems as though its running way to rich any suggestions

Response From nickwarner Top Rated Answer

make sure you don't have any vacuum leaks. After that, look at the EGR valve. For a quick test with minimal tools, make a plate out of sheet metal with the bolt holes needed for the EGR gasket. Put it in the block any flow from the EGR to the intake. Then use Seafoam through the intake to clear out as much carbon as possible. If it runs right, replace the EGR valve as it is sticking open. Also remember that a stuck open EGR can foul up the cat and it will need to go if this is the case. Have you checked to be sure you have proper fuel pressure at you injectors?

Response From prolube

its funny you mention the egr because when its idling you can push up on the egr to open it up and it idles fine which is wierd. another thing if you take one or more vacuum lines off the intake it idles fine too like its not getting enough air or its getting to much fuel. i took apart the fuel pressure regulator and the diaphram looks fine so i dont think thats the problem. there doesnt seem to be any vacuum or intake leaks i sprayed carb cleaner all around and it didnt change the idle so i dont think vacuum leaks are the problem. how do you check fuel pressure without there being a port on the fuel line to connect to. i assume you have to take the fuel line off and make a fitting that will hook up to a pressure gauge.

Response From nickwarner

your assumption on the adapter to check fuel pressure is correct. With the adapter sets that go with a good gauge is one that goes between the fuel line and throttle body to allow for a measurement. If only the engineers had some sense to them back then you'd have a test port but alas we must jump through some hoops to test the pressure. It does sound like overfueling from what you describe, and a restricted return line or a bad pressure regulator could both cause this.

Response From prolube

could contaminated fuel make it run like this? i changed the fuel filter like a week ago and i just took it off today and was full of rusty looking fuel so i drained the fuel filter and put it back on and it ran like a champ til the filter got full of rust again so i repeated this procedure with the same result. i also shined a flashlight in the tank and it looks very rusty in there im thinking this has alot to do with it. the customer is the one who changed the fuel pump so i never really looked til now but im assuming that the fuel pump didnt look so good when he changed it. also he didnt change the whole pump assembly just the pump itself is it possible that the electrical connections on the pump could be corroded or bad. anymore suggestions would appreciated thank you

Response From Tom Greenleaf

Comment on rust found in fuel filter:

If this vehicle is a 'keeper' price out a new fuel tank. You could attempt with it off vehicle to clean it but by the time rust is in the fuel it will probably leak fairly soon which is a guess.

IMO - that will mess up diagnosing any other problem if fuel can't be delivered properly you could and probably will see random pressures throwing you off. Check - a new tank may not be that expensive and do replace the pickup sock on the pump in tank and a new fuel filter. It stinks but go for good ones as you don't want rust to pass it. I go back a few ions and we used to take a magnet in carb's fuel bowl to get it out! Can't on this but used to put clear or "see thru" filters on them if no budget allowed a new tank so you knew it was time to clean or replace time after time.

Your call of course. By the time rust stops fuel from even getting pumped out of the tank it could cost you the pump too so might be a bargain to do something now,

T

Response From prolube

i already tried to get a replacement tank but they no longer make them of course. so im in the process of removing tank and cleaning it hopefully it works thanks for the input

Response From Tom Greenleaf

More thoughts on the tank:

If you get in trouble getting rust out or create a leak in doing so - try radiator shops (there must be one left - ha) or motorcycle places as some make up tanks from scratch!

There's also a product I've read about but never used for restorations of obsolete stuff that goes inside like paint and seals it! No idea what the dry time is but saw it in "Hemmings Motor News" - used to subscribe and there were ads for folks who made parts, re-chromed and anything you could think of. Hemmings has a web site, guess www.hemmingsmotornews.com -- they are based in Bennington, VT.

Don't be afraid to use soap and water to clear it out and of course let dry well. If it really gives you fits hit back - one of us old pharts will think of something


T

Response From nickwarner

This response has been deleted

We do not advise inexperienced people to do something so dangerous.

Response From prolube

ive got 15 years experience in the automotive industry but thanks for your concern. i got the tank out and it is full of rust so im taking it in to get properly cleaned and sealed hopefully it works

Response From Hammer Time

Sorry about the inexperienced comment but what he suggested shouldn't be attempted by anyone, nearly impossible to do without getting hurt.

Response From prolube

i never got a chance to read what he wrote so i dont even know what ur talking about. it must have been a stupid idea though if u deleted it

Response From Hammer Time

It might have worked but you probably would have lost your lungs or your skin in the process.

Response From nickwarner

which is why the post started off and reiterated multiple times the dangers involved and the need for safety equipment. It works but you have to be careful and respect the chemical you are dealing with.

Response From prolube

ok so i took the tank to a repair shop and they cut it open and cleaned all the rust out. i have reinstalled the fuel tank and now the vehicle idles great and from an idle u can rev it up to like 4500 but then it bogs down and runs like crap until it gets back to an idle then u can rev it again til it hits 4500 then nothing any more suggestions would be appreciated

Response From Tom Greenleaf

BTW - 4,500 RPMs without load (if so) is close to enough to blow up the engine! To high - it needs the load or ear muffs for the big bang.

How does it just drive in normal conditions?

T

Response From prolube

the rev limiter is at 4500. it drives like crap when its put under a load it spits and sputters and chugs and you have to feather the gas pedal just to get it to move a little bit. ive been working on this stupid chevy for about a month now put many hours and dollars into this thing with no result. im real close to giving up on it. help me please

Response From Tom Greenleaf

It may have a rev limiter not to be tested but would sooner believe that's the RED line on a big block Chev without modifications. Bent valves, bearings, weak links anywhere would be subject to fail. It's old now so not everything is to new specs and that's plenty IMO for very real damage.

Now I'd do a cylinder balance test to see if that caused an issue. At idle that monster engine probably wouldn't complain as much but would when power was needed,
T

Response From nickwarner

Put another fuel filter on it. I'm sure you did this before, but bear in mind your tank was loaded with rust and that clogs a new filter quick. When you put the tank in, did you replace the strainer? This would definately be full of rust if not. What fuel pressure do you have at your throttle body?

1990 GMC s-15 idles up and down

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Question From crkresen on 1990 GMC s-15 idles up and down

I have a 1990 GMC S-15 4.3 motor, When you start up the idle goes up and down to where sometimes it stalls out. have replaced tps, iss , and ecm. have checked for vacuum leaks. don't know what to look for next. any suggestions?

Response From kev2

check for codes, clean TB esp the bleed hole for the IAC- double ck for Vac leaks- use spray trick- be sure EGR is seating sometimes carbon binds pintel.

Response From crkresen

thank you for your reply. have cleaned throttle body, do i need to take out EGR valve and clean?

Response From Tom Greenleaf

EGR: Pintle as mentioned by DS could be not seating and to get a real clue take it out and look - carb cleaner thru it pushing pintle on block of wood or similar. Have a new gasket if removed as it will probably tear it up,


T

Response From crkresen Top Rated Answer

Thank you for your reply. took off egr valve and cleaned with carb. cleaner, still same idle pattern. any other suggestions?

Response From Tom Greenleaf

How are you checking for vacuum leaks? Un-metered air is going to confuse the thing especially at idle which is why it was mentioned early here. PCV system and all hoses. Right up to vacuum hose to brake booster - all possible places of throttle body, housing to manifold, manifold to heads etc.,


T

Response From Discretesignals

Also make sure your EGR valve isn't getting a vacuum signal at idle.

Response From crkresen

how do you check to see if egr valve is getting vacuum signal

Response From Hammer Time

Just pull the hose off when it's idling and you will feel the vacuum. You will also hear the engine clear up if there was vacuum.

Response From car1104

I had a 4.3 that idled up and down. Never stalled but does the problem clear out after running for a while? I suspected the alcohol --gas mix needed time to mix better. I changed gas stations for a while and stayed on premium gas, my problem when away.

91 GMC

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Question From ednoid on 91 GMC

Hi. I have a '91 GMC 1500 w/5.7 It starts no problem, but when excellerating it will pop, like a back fire, then runs like it fouled a plug. I've changed the injecters in the TBI, checked vacuum lines, tested the EGR valve the old fassioned way...rev the motor and see if the diaphram moves. Plugs are new. Good wires...etc. Any idea? It almost seems like vacuum advance isn't funtioning properly, but not sure how to check.

Any help would be appreciated.

Response From Discretesignals Top Rated Answer

Does it backfire out the exhaust or intake?

Response From ednoid

Not sure, but thinking intake. It's more of a sputter, pop, like it wants to die thing.

Response From Discretesignals

It might be a lean back fire on acceleration. Have you watched your fuel pressure when you accelerate to see if it drops out from lack of volume?

If you have a scan tool or volt meter, you can watch the O2 sensor voltage with the O2 hot and working. The voltage should peg at .9 volts (rich), when you get on it. If the O2 voltage doesn't peg, you don't have enough fuel getting into the combustion chambers.

You could have an ignition problem, but most the time ignition problems cause a backfire out the exhaust.

Another possibility is a leaking intake or exhaust valve under high pressure. Pressure in the cylinders is really high under WOT (wide open throttle) acceleration.

Response From ednoid

It only does it while driving, not while in neutral, so I don't know if I can test the O2 censor. I do hear a ticking. Sounds like a valve or lifter. I thought it was the header leaking, but thinking the former now. Thanks for the help and for spelling acceleration. I thought I was spelling that wrong.

Response From Tom Greenleaf

Just a thought - did you maybe drop any spark plugs when putting new ones in?

T