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Best Selling Genuine Oldsmobile Catalytic Converters

  • We Stock the following top leading brands, including Eastern Catalytic
  • Constantly Updated Inventory of Oldsmobile Replacement Catalytic Converter Parts
Eastern Catalytic
Qty:
$50.29
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - Standard
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Standard
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.25" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.25" Id
    • Overall Length (IN): 14"
    • Shape: Oval
    • Test Weight: 5.9 / 6000
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
1986 - Oldsmobile Toronado V 6 Cyl 3.8L 231 3800
Eastern Catalytic
Qty:
$50.29
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - Standard
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Standard
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.00" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.00" Id
    • Overall Length (IN): 14"
    • Shape: Oval
    • Test Weight: 5.9 / 6000
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
1992 - Oldsmobile Toronado V 6 Cyl 3.8L 231 3800
Eastern Catalytic
Qty:
$71.13
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - ECO II
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Eco Ii
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.50" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.50" Id
    • Overall Length (IN): 14"
    • Shape: Oval
    • Test Weight: 5.9 / 6000
  • Proprietary ECO II NANO substrate chemistry is designed to be effective on most complex or second-generation on board diagnostics (OBD II) systems and yields highly efficient loadings for lower cost and better converter efficiency. Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology helps to maintain industry-leading efficiency, productivity, and competitive prices.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
1999 - Oldsmobile Bravada V 6 Cyl 4.3L 262 -
Eastern Catalytic
Qty:
$71.13
Eastern Catalytic Catalytic Converter  Rear
  • Federal / EPA Semi-Universal Converter - ECO II
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Eco Ii
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.50" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.50" Id
    • Overall Length (IN): 14"
    • Shape: Oval
    • Test Weight: 5.9 / 6000
  • Proprietary ECO II NANO substrate chemistry is designed to be effective on most complex or second-generation on board diagnostics (OBD II) systems and yields highly efficient loadings for lower cost and better converter efficiency. Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology helps to maintain industry-leading efficiency, productivity, and competitive prices.
Brand: Eastern Catalytic
Position: Rear
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2001 - Oldsmobile Bravada Rear V 6 Cyl 4.3L 262 -
Eastern Catalytic
Qty:
$71.87
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - ECO II
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Eco Ii
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.50" Id
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.50" Id
    • Overall Length (IN): 14"
    • Shape: Oval
    • Test Weight: 5.9 / 6000
  • Proprietary ECO II NANO substrate chemistry is designed to be effective on most complex or second-generation on board diagnostics (OBD II) systems and yields highly efficient loadings for lower cost and better converter efficiency. Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology helps to maintain industry-leading efficiency, productivity, and competitive prices.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - Oldsmobile Silhouette V 6 Cyl 3.4L 207 -
Eastern Catalytic
Qty:
$104.97
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - ECO GM
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 12"
    • Catalyst Type: Eco Gm
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.25" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.25" Id
    • Overall Length (IN): 16"
    • Shape: Large Oval
    • Test Weight: 5.9 / 6000
  • Proprietary ECO GM NANO substrate chemistry is designed specifically to meet the emissions challenges of GM's 2.2, 3.1, 3.4, and 3.8L engines. Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology helps to maintain industry-leading efficiency, productivity, and competitive prices.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Drive Type Block Engine CID CC
2003 - Oldsmobile Silhouette FWD V 6 Cyl 3.4L 207 -
Eastern Catalytic
1996 Oldsmobile LSS Catalytic Converter 6 Cyl 3.8L Eastern Catalytic - UNIVERSAL

P311-4558DAA    99176  New

Qty:
$104.97
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - ECO GM
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 12"
    • Catalyst Type: Eco Gm
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.50" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.50" Id
    • Overall Length (IN): 16"
    • Shape: Large Oval
    • Test Weight: 5.9 / 6000
  • Proprietary ECO GM NANO substrate chemistry is designed specifically to meet the emissions challenges of GM's 2.2, 3.1, 3.4, and 3.8L engines. Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology helps to maintain industry-leading efficiency, productivity, and competitive prices.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - Oldsmobile LSS V 6 Cyl 3.8L 231 3800
Eastern Catalytic
Qty:
$93.30
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - ECO GM
  • Undercar Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 12"
    • Catalyst Type: Eco Gm
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.00" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.00" Id
    • Overall Length (IN): 16"
    • Shape: Large Round
    • Test Weight: 5.9 / 6000
  • Proprietary ECO GM NANO substrate chemistry is designed specifically to meet the emissions challenges of GM's 2.2, 3.1, 3.4, and 3.8L engines. Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology helps to maintain industry-leading efficiency, productivity, and competitive prices.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
2004 - Oldsmobile Alero L 4 Cyl 2.2L 134 2198
Eastern Catalytic
Qty:
$50.29
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - Standard
  • Undercar; Single Exhaust System Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Standard
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.00" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.00" Id
    • Overall Length (IN): 14"
    • Shape: Oval
    • Test Weight: 5.9 / 6000
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
1992 - Oldsmobile Cutlass Supreme V 6 Cyl 3.1L 189 -
Eastern Catalytic
Qty:
$50.29
Eastern Catalytic Catalytic Converter
  • Federal / EPA Semi-Universal Converter - Standard
  • Undercar; Dual Exhaust System Legal Note: Not For Sale or Use in the state of CA/NY & Maine (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Standard
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.00" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.00" Id
    • Overall Length (IN): 14"
    • Shape: Oval
    • Test Weight: 5.9 / 6000
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Additional Fitment Information:
Vehicle Block Engine CID CC
1993 - Oldsmobile Cutlass Supreme V 6 Cyl 3.1L 189 -

Latest Oldsmobile Repair and Catalytic Converter Installation Advice

CarJunky AutoAdvice

codes p0100 and pending p0101 p0102 p0103 p0104 p0105

Showing 7 out of 7 Posts
Question From ford25076guy on codes p0100 and pending p0101 p0102 p0103 p0104 p0105

this is a 01 oldsmobile alero gl with the 2.4l I was wonder why I have a code for a maf sensor but this car does not have one so im lost and don't know why all the other codes are pending. shop I took it to said it might be the catalytic converter just want more ideas.

Response From Discretesignals

Could you give us more information on this vehicle such as what the symptoms your having, any recent repair history before this happened, and what things have been replaced? Was a different scan tool or code reader used to see if those codes still show up when scanned. Seems there is something flakey going on.

Response From ford25076guy Top Rated Answer

well I work at a body shop so the scan tool I used im pretty sure was different from theirs but the car itself in the repair history has had abs/break work done as far as codes. The guy we bought it from did a few things like the coil and spark plugs and breaks and water pump, but the car itself runs and drives really well. great compression in all cylinders and the air cleaner is not clogged up. only thing I kind of notice is that it shakes a little bit at idle

Response From Discretesignals

I would try a different scan tool just to see what codes show up. Don't understand why your getting MAF codes on that one. Strange.

Response From ford25076guy

well anther scanner picked up code p0420 which is a common code for the catalytic converter so I will just hope it fixes the problem and thanks for the help

Response From Tom Greenleaf

That code just tells you it detects lower efficiency not definitely replace a converter. If converter is truly bad it was probably killed not the cause and could do so to a new one,


T

Response From ford25076guy

well I went ahead and replaced the catalytic converter and I hooked up the scan code and it was reading the p0420 code and I cleared it and it work so car seams to idle a little better as well.

1988 ciera 3.3L V6, stalls,runs hard and hot

Showing 3 out of 4 Posts | Show 1 Hidden Posts
Question From carproblem247 on 1988 ciera 3.3L V6, stalls,runs hard and hot

I have a 1988 Oldsmobile Ciera 3.3 V6 with 90,000 that I have had for 3months, about 2weeks ago on the way home it loss power, and it sound like the engine was louder or a hole in the muffler, then by the time I got close to home it stalled then i couldnt start it, I let it sit for hour and it started i got about 2 miles and it stalled again...so i left it and come back the next day it took like 3mins to get it to start but i got it home....now if i try to start it its very hard some times to start and i have to give it gas to keep it running or it will stall. i cant get it going for 30mins-hours but it will start again" it has A knocking/clicking sound at the back of the engine, it still has a power loss and it gets kinda HOT. Ive drove it 30feet in 2weeks what do i need? PLEASE HELP!!! it also sounds like a gun shot some times when i try to start it, and it sounds like a bubbley noise from the engine I think.

Response From Sidom

Best thing to do when it won't start is to find out what you are missing. Fuel or spark? That will help narrow things down...

On this car after hearing what you said I think I might take a quick look at the exhaust system.... Also most sounds like a restricted exhaust problem.... After it's warm hook up a vacuum gauge & see what the reading is @ idle & then high rpms.... If the reading is low @ idle & goes to almost zero at high rpms you may have a restricted exhaust system. Being able to take a back pressure reading would confirm it. If not you can run it until it dies & then pop out an O2 or take the pipe loose from the exhaust manifold to see if it will start back up (yea I know everything is hot but no way around that)........

Response From carproblem247 Top Rated Answer

Thanks for your help so far" well this week I found one problem to be the air filter, it was really really bad plus weeds and a dead mouse in it...i know thats pretty bad! well after changing it the car starts up alittle better... i was even about to take it to the store, but if it warms up it will not start for hr the fan does work though. now when I drive the car it feels like its not getting fuel or something doesn't have any pull, it does not go real fast, it takes time to get it up to 15mph to 25mph it fells like to wants to stall and if i push on the gas to far it will stall out but will start up aslong as its not warm. All the spark plugs are sparking, and i think the catalytic converter may be clogged, the bolts are rusted and i cant get them off, so i will be putting a few drill holes in it to find out if that is one of the problems!...I took off the start of the pipe right after the exhaust manifold not sure of its name, the pipe that connects the the front 3 to the back 3 and goes to the catalytic, there are 6 pipes that come from the engine the front 3 and the back 3. the back 3 that still was connected kinda to the catalytic converter had the open end though that had black smoke coming out of the pipe, The front 3 showed no smoke from its end that was opened" this means what??? I'll try the vacuum gauge also

Response From Loren Champlain Sr

carproblem; The 'black smoke' is indicative of overfueling, which will destroy a catalytic converter. The saying is "Catalytic Converters don't die, they are murdered". Try removing an oxygen sensor before you start drilling holes. It will be noisy, but if your power comes back, you can be pretty sure it's a plugged cat. The vacuum test is another good indicator. The vacuum at 2500 rpm should be as great or greater than the reading at idle. But.....you need to address what caused the cat to go bad, in the first place, or you'll murder the new one...if that's the problem.

rough idle

Showing 2 out of 7 Posts | Show 5 Hidden Posts
Question From countrygirl49 on rough idle

My 1994 oldsmobile bravada has been idling rough and missing. Started a couple months ago, I thought it needed some dry gas. Burning rich, leaving a little black carbon on tailpipe. Smells like gasoline a little. oil,transmission fluid fine, nothing dripping or leaking, stopped at Autozone and had them scan it. no faults the computer said. runs fine at speed, but the last couple of days , the rough idling is getting worse. No service light came on, tach doesn't dropped, just idles rough at slowdown and when you pull out. I have a funny feeling it is something that I will have to start small and have a mechanic check out. So any one have any ideas to get me started?

Response From Tom Greenleaf Top Rated Answer

Troublesome without a code???? You'll have one soon though if it's running poorly and that code will probably be misleading.

There could be some kind of vacuum leak that could cause problems and not trip the computer yet.

Suggestion is to find the problem soon and someone here may have an answer. I will say that if you wait too long you will add a catalytic converter to the repair. Hey - good luck and let us know what you find, T

Response From countrygirl49

Thanks for replying. That was just a Autozone scan, I had it done on October 10 (just yesterday)
I have a funny feeling it is something like that, it has highmilage, but we take good care of it. Iget an oil change reg, check the transmission, we had a new central port put in last April, it is only one year old. No white smoke ,no rattling in engine. in fact it is just the rough idling and missing.My mechanic is pretty good, he said he would start small and start checking. My gut feeling has told me it is something off the wall, and that it is fixable. I will take any suggestions though!
Thanks!!

Response From Tom Greenleaf

I've gotta check out this AutoZone scan thing that is posted all over this forum. I have a couple cheapo ones that just blink but they've been correct. It's a pest to count blinks and make them into #s but they work.

I still think you have a vacuum leak and may be hard to find, T

Response From countrygirl49

Thanks Tom, The hand held computer he used (Autozone) plugs into my computer outlet. Maybe he wasn't doing it right? I checked the oil on my car this morning.. no sludge. and no milkiness or smelling like gasoline like it did when we replaced the central port. and our mechanic changed my oil approx. three weeks ago, he did the central port and he always checks to see what the oil looks like, he is a pretty good mechanic. I haven't driven the car, told my kids and hubby not to drive it until we get it to our mechanic. The only thing is our mechanic lives about 30 miles away, do you think it is okay to baby it over to him the way it is running? or do you think we should flatbed it over. Oh and could this damage the head gasket. Agains Thanks and have a great day!

Response From Tom Greenleaf

It's your call to drive it or not. If you don't have a car club like AAA I would get one. My membership costs about $75 bucks but saves me 5% on car insurance and has 100 mile free towing! Discounts on hotels and more so it's really free.

I am not party to AAA and there are others but it's always been good to me. If you have nothing get one. If you want to try AAA they are at AAA.Com or try 1-800-222-8252. I think you should be in some car club like that one.

Check out the car clubs as said they end up being free. With you car problems and distance the less you drive it the better right now but again your call, T

Response From countrygirl49

Tom,hey thought about AAA a few times, of course being on a tight budget, I never seem to get to it, but I do think I will do it now.We have been carpooling between between my son's car and hubby's, like I said they are under strict orders not to drive it... thanks for the info...have a great day!

Power hesitation for 2002 Oldsmobile Alero

Showing 2 out of 8 Posts | Show 6 Hidden Posts
Question From towcar on Power hesitation for 2002 Oldsmobile Alero

Hi guys, first time lurker here.

My car recently started having issue, where at lower speed the car will lose power (the engine still revs, but not much accleration/power, it gains speed slowly and jerks a little), after a while the car would gain more power again with a stronger jerk (35mph +). Described the symptom to my co-worker (he's ASE certified, but he's currently a maintenance supervisor at my place and he's always busy) and he scanned with his meter (don't know what model) and it didn't give any code. He suggested me to take the car to a transmission shop and have it checked.

At Aamco the guys checked it out and said it's a not a problem with the transmission but with the Catalytic Converter, the tech took it off and the car ran fine. They said the cat is plugged and it stinks when he took it off. As my cat is still under warranty (8 years, 80k Mi). They didn't charge me and I took it to the dealer.

Dealer called back saying the problem isn't with the Cat, but they did get a random misfire code and a code for the EGR valve. They wanted to do a fuel induction service, new spark plugs, wire, and replace the EGR valve, $899 + tax and all the fees of course.

I have my co-worker called them and explain to what the guys at Aamco find but the dealer insisted that they problem isn't with the Cat and that they have better machinery for the diagnosis of the problem.

I've had service twice before at this dealer due to bad gas (or so they say) where they did the fuel induction service, spark plugs, the whole deal, and drained the gas tank and cleaned it. They also mentioned each time when I was paying that they also replaced the fuel pump under warranty, even though they're not supposed to do. The last time I was there was 1.5 years ago and my spark plugs and wire looked brand new to my co-worker.

I don't know who to believe here, something tells me that the dealer is kinda fishy with the fuel pump replacement (may be that's the real culpit and they're charging me all the extra work for nothing??).

I can always take it to another shop but it'd be another $100. What do you guys think I should do? My co-worker did say may be he can bang on the cat for me and put it back where it won't be plugged anymore, but i think also render the cat useless.

Help...

Response From towcar

Thanks for the great suggestions and knowledge guys.

The thing is I just had all the fuel system cleaned, new spark plugs, wire, fuel tank cleaned less than 2 years ago. So the real question is could whatever bad stuff i got in my tank from before i got my fuel system cleaned slowly caused this issue almost 2 years later?

Or could the EGR valve cause the cat to fail?

I really have a few options:

1) Pay $1k (899 + tax and fees) for the dealer to fix it. I think there is more gaurantee there.
2) Go to a second dealer to get a second opinion (another $100).
3) Pay $5xx for the shop to replace the cat. Don't know if there is guarantee their even as they diagnosed it as a cat problem.
4) Buy a cat online and swap it out myself (i think the cat is bolted) as the mech at the shop was able to test drive without it so the bolts should still in good shape and don't have to be cut.

Response From Tom Greenleaf

Any reason - if the engine isn't running near perfectly it would likely throw too much raw gas at converter and kill it.

Alone a restricted exhaust like a bad converter would just take power away smoothly IMO. A source problem needs to be fixed or you'll just be doing another converter soon. Anything that can make an engine run poorly can cause this - may need pro help to diagnose it,

T

Response From Loren Champlain Sr Top Rated Answer

towcar; The symptoms point to a plugged catalytic converter. This can be checked with a pressure guage connected at where the oxygen sensor is located. Anything above 2psi is not acceptable. With that said, if it is a plugged cat, something had to 'cause' it. As we say in the industry, Cats don't die, they are murdered. A misfire, if ignored, can ruin a cat. Sooooo.... The injector service shouldn't be needed more often than 30K mile intervals. Of course, it depends on what fuel you have been using. Stay with name brands. Chevron, Union 76, Texaco, ect. No minit mart or ARCO. If the cat smelled like sulphur, it is dirty. If it is dirty it's because it's burning contaminants. Being an '02, your car has misfire detection and should tell you which cylinder is causing the problem, as well as setting a code for low catalyst efficiency. The EGR valve could cause a problem if it is sticking open, but you should be able to tell if the engine is running poorly.

Response From towcar

Thanks for the quick reply.

I think it could be due to the "bad gas" problem that was fixed before. I only go to places like Sunoco and Chevron, and occasionally Walmart gas station. I never go to the mom and pop shop.

It could be that the Cat problem is caused by burning of bad gas from before?

My dilema is that if it's the Cat, it's still under warranty. However, I can't convince the current dealer that's the issue. Taking it to another shop is risky as it's another $100 and it may be a different diagnosis.

Perhaps my best course of action is to wait for my co-worker friend to look at it and may be try to lose up the cat a bit to see if the problem goes away first. If it is the cat may be i'll get the part myself on the web and pay some local shop to replace it for me. screw the warranty...

Response From Loren Champlain Sr

I'd definitely pursue the warranty option. The aftermarket 'cats' just don't last. But, if it is the cat, you need to address what caused it to die.

Response From Tom Greenleaf

As our own famous DanD would say - converters don't die - they are killed. Any misfire must be corrected asap or it will kill a converter(s),

T

Response From towcar

Additional detail: the lower intake manifold/gasket was replaced before as well (it leaked coolant). Apparently it's very common the V6.