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Jeep Cherokee Sport HELP!
Also, my check engine light is constantly on. error codes are for "evaporative emissions system leak (large)", and occasionally "cylinder 3 misfire". i have had numerous hoses replaced, and replaced my gas cap, but problem persists. also had plugs and o2 sensor replaced at 100,000 miles.
AND (oh yes, theres more!) sometimes when i start it it runs really rough. it will idle low and act like its gonna stall, but doesnt. if i try to drive through it, it continues running very rough until i stop and turn it off and back on. usually then, (but not always) it runs fine after restart until the next random time it decides to do it again. happens both on cold start and after sitting for only 10 minutes, but only occasionally, only a few times a month.
AND when i start it, theres a knocking sound. nothing too deep or loud, and it usually goes away or is barely audible after warming up. pretty sure its a lifter sticking, but figured id put it on here for a second opinion.
and, FINALLY, this is the least of my concerns, but im wondering if this is a common problem. my a/c quit working in 2004 when the prior owner (a family friend) had it. she had the compressor and condenser replaced and it worked for a while after being charged, but eventually stopped again. someone told me that evaporator cores are known to go bad on cherokees, and im wondering if this is the likely culprit.
Well, thats where im at at the moment. any info or suggestions at all would be greatly appreciated. For some God awful reason im ridiculously attached to my Jeep and am not ready to let it go!
Thanks so much!