| Hi All, I have been a lurker on the forum for years but this is my first post. I have a 91 NA, I have owned since new. The car has been running perfectly...until today. I took her out and noticed some funny backfiring pops and some hesitation. When I press the pedal down I get more of the same. I drove it for 10 minutes and none of it went away. So I park in the garage and leave it running and look/listen under the hood. All seems normal enough although the idle is a bit rough. I rev the engine with the throttle cable and more odd noises but now it really appears to be coming from the exhaust area. I looked under the car and noticed that the pax side cat is glowing orange! The drivers side is fine. So I shut it down. I little more backround: I have had some issue with the temp gauge which still is not reading after replacing the sensor ( I had been in the cluster replacing bulbs) I am running Labree high flow cats, as well as a Labree cat back which I installed this spring.
Someone suggested the car may be running lean on the pax side which might be caused by a vaccum leak. Ive ordered a pressure tester to check .
Can anyone provide guidance on how best to troubleshoot? Im sure I will have some questions as well as my mechanical skills are definetly not extraordinary, if you know what I mean.
Thanks very much.
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