Question about 1999 Chevrolet Lumina
Try the tps, throttle position sensor, and the idacv, idle air control valve. Even sometimes the temp sensor could be bad, telling the motor its cold when its really hot..
Posted on Oct 08, 2017
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Posted on Jan 02, 2017
do you get check engine codes?..have you done a leak down test and compression test to determine mechanical engine health?
Posted on Oct 07, 2008
Check your fuel pressure, and or injectors. You may have too much fuel getting into the engine causing it to burn rich and overheat the converters.
Posted on Apr 26, 2009
Hi! You must be frustrated by now! your code is marking that the O2 sensor is bad in bank 1. Did you replace the O2 sensor that is located before the catalytic converter? The S10 has an O2 sensor specially made for that cat. its about 30$ That would explain for your blackened spark plugs; your pc on the car is asking for more fuel. GOOD LUCK!!
Posted on Apr 29, 2009
See if there is a code in the computer and work from there. Find someone with an OBD2 code reader. If I'm not mistaken an OBD2 code reader works on 1996 and newer models. Could be a bad coil and you don't notice it when you first start it until it idles down, to check for that, while the engine is running, pull each wire off the spark plug, Each time you do that you should hear the engine struggle. Then pick back up once you plug it back to the spark plug. If you pull one and nothing happens to the engine, that could be all or part of the problem. Hope this helps.
Posted on Nov 24, 2009
Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?
Posted on Dec 18, 2009
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