Autozone read the initial code (P0320 CKP); the counter person told me he would clear the code. However, I'm not 100% sure since I didn't watch them. I know the second set of codes (P030x multipe misfires) were cleared because I watched the Autozone person do it. Since then, I've drove it the last two days and so far no codes have reappeared. I have held my speed to below 80 mph. I did an internet search on "1998 Jeep misfire codes." There's allot of discussion about possible misfire code causes; other sensors, after-market vs. OE parts, dist caps, rotors and weak valve springs. Yet, there was one discussion thread that described exactly what I'm experiencing to include both codes (CKP & misfire) and contributing driving habits (higher speeds). Their solution: recheck the crankshaft position sensor (CKP) installation to make sure it is seated properly in relation to the flywheel. They stated that while the sensor only moved an additional 1/32", it was enough to stop the misfire codes from reoccurring. So far, it appears the CKP sensor was the prob for the initial code (no more random dead misses or engine dying). The installation of the CKP sensor is such that it's difficult for one person to apply pressure on the CKP sensor while tightening the retaining bolt. I'll either get someone to assist or figure out how to wedge something against the sensor to insure it is seated all of the way down as I tightening the bolt. (I know there has to be an air gap between the sensor end and F/W. It came with a paper spacer to insure proper spacing.) I have a tendenancy to overlook the obvious. Worth a shot before I pursue some of the other suggestions ($$$$). Please let me know if you see something that I'm missing. Obviously, I'm weak at the diagnostics. Like most, I'm a parts changer.
Thursday, February 9th, 2012 AT 2:49 PM