Shop International Mufflers

I went to acar garage as my carwas making a louder noise than usual. The mechanic said it was due to the baffels but what are they and what do they do ?

this is a pretty general question which will yeild a general answer.


im going to guess that he is talking about your muffler. the internals of a muffler are packing and baffles to deafen the sound emmitted from the engine.

over time the packing degrades and the baffles usually rust apart.

I have a 2005 Nissan Exterra, the check engine light went on. I got a code for the emission control valve C short. What are the steps in solving this myself before bringing it in to the shop?

Hello,

Thx, your right I have, I looked at code wrong..so could this be a muffler issue or is it internal? I want to diagnose problem as much as possible before calling a mechanic..

I recently had a clutch kit and a 5 speed transmision put in my car..since that was done every morning when i start the car up i get white to light blue smoke comming out of the muffler and its a lot..i drive a 1997 honda civic dx 5 speed.180,000 miles...it also happens if the car sits for a period of like 4 hours or so..but there is no smoke when the car is warmed up. would those repairs be related if not done right?or how can i reduce the smoke if possible

To patsfan, if the pcv system is working properly then you have an internal oil sealing problem.

I've seen many honda motors run 200k plus miles with no problem.

You might try replacing the valve stem seals, it's somewhat of a gamble but definately cheaper than new motor.

I have a 1995 Chevy S-10 Blazer 4.3 V6 (ENG vin code is W )
Ireplaced the CPI and now the truck runs real rough and missfires and hardly moves when in gear as it is missfiring even small backfires when you try to rev it up .

Also after running for a bit the catalytic converter glowed red hot . I replaced the catalytic converter and the #2 oxygen sensor and the spark plugs and it still ran very rough and the converter and the pipe to the muffler still glowed red hot . I didn't replace the #1 O2 sensor in front of the converter should I have replaced it too ? Also after it glowed red do you think that the new #2 O2 sensor and new converter is now bad or can it handle 1 time of being red hot ? Did I ruin the new converter and O2 sensor by running it till it was glowing red hot . The truck also has a fairly new muffler and tail pipe is it possible that it is plugged now do to running with red hot converter . so to recap I have installed a new CPI -Spider fuel Injector assembly and a new Catalytic converter , O2 sensor on downstream side and new spark plugs , air filter and oil too . I checked EGR and its not plugged and plunger moves ok . i checked the cap n rotor and they looked fine . So whats next move ? The truck runs real rough and missfires and hardly moves when put into gear .

Most of that stuff wan't necessary. the Cat is glowing because of either too rich or too lean of mixture. You really need a scan tool to find out which it is. You could have an internal fuel or vacuum leak.


We were typing at the same time Steve.

My 1992 Plym Acclaim w/2.5L 4 cyl failed emissions insp for NOx reading 1529 on a 970 max std. I replaced cat converter as muffler shop dtermined it to be bad. NOx went down to 1469 still failing. I do not know where to look next. Any ideas?

Do I disagree??
YES!
A properly functioning EGR system on an engine running the way it was intended will reduce NOX emissions by at least 50%! The major contributor to the production of NOX (Oxides of Nitrogen or photochemical Smog) in an internal combustion engine, is load and heat. We can’t do a lot about the load on the engine; the engine has to push the car down the road but we can do something with the heat generated during the combustion process and that’s where the EGR system comes in.
Basically the EGR introduces inert gases (exhaust) back into the combustion chamber to take up space which in turn will reduce internal combustion temperatures. In other words to help fill up the combustion chamber with something that doesn’t burn.
Yes this exhaust gas is hot but nothing compared to the heat generated by the combustion of compressed hydrocarbons and oxygen; again because there’s nothing left in the exhaust gases to burn it has a cooling effect on the over all combustion chamber.
When I say a cooling effect I don’t mean that by having an EGR system repaired you’re going to see the engine temperature gauge suddenly drop. That’s because we’re talking combustion temperatures, which the cooling system of the vehicle has been designed to look after via the thermostat.
I’m an emissions repair tech here in Ontario’s emissions testing program and I have seen so many catalytic converters condemned when yes they may be on the weak side but would still get the job done if the input gases from the engine were down to an acceptable level.
Dan