Question about Cars & Trucks
Trying to figure out why my check engine light is still on had previous work done and still it comes on, i know theres exhaust/fumes leaking because i can see it on the driver side under the hood. would welding a small leak be sufficient or should i replace the whole thing?
A crack in the exhaust manifold will definitely cause the Check Engine light to come on as the O2 sensor is detecting exhaust gasses that have too much oxygen. The computer adjusts the fuel mixture and you end up wasting fuel and burning a lot of it in your catalytic converter (which will eventually clog and fail).
Welding is usually not an option - but if someone will do it and guarantee the work - go for it. Otherwise, this can be a fairly expensive job. Your regular mechanic might be able to do this work - but you may have been luck at an exhaust specialty shop like Midas or Meineke.
Posted on Jul 10, 2013
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Posted on Jan 02, 2017
if the exhaust is just cracked i wouldnt worrie about the engine because you still have a lot of backpressure and it should not burn a valve. but replacing the header is a good idea if the header itself is cracked. and to tell you the truth your mechanic should be responsible for the cost of the repair since he broke it in the first place. In the shop i own if one of my mechanics breaks something it comes out of my pocket to replace. its all part of the job sometimes things just happen and you have to take the responsibility for it
Posted on Jun 09, 2009
some cars have cabin air filters for the cliamte control system. It would not cause a leak. Look for a grommet loose or a seam leaking. Lift up the carpet and follow the stain to its source.
Posted on Jun 26, 2009
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