2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
I have a 1995 Ram 1500 2 wheel drive with the 5.2 engine. It failed the test with high HC and high NOx, the catalytic converter and O2 sensers are good. The truck runs good, no hesitation during acceleration, never stalls, and idles smoothly. I cannot afford to take it to a garage for repairs it may or may not need. Please give me some advice as to what troubleshooting I can do my self first. I am thinking PVC valve and/or EGR valve. The timing feels ok. Any input will be appreciated.
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The test means nothing, I've done tons of E tests on o2's(and a new one solved the problem). And how did you "manually" check the CC ? One other thing, you also stated that your "o2 senors" are good(plural) a 95 only has one?
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Yes you will laugh....but I checked the catalytic converter by parking on some high grass and watching for smoke....then I used an oven thermometor and verified that the temperature at the outlet was higher than at the inlet....Also, the emissions test verified the catalytic converter and O2 sensor to be good. Yes, I know I only have one O2 sensor.
How old is the O2 sensor? How many miles on the truck? Has the plenum been fixed? (that would be something I would check immediately, if you are burning oil from a blown plenum, you will NEVER pass the sniffer test.)