03-18-2015, 07:15 PM
Thread Starter
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#1
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Newb
Join Date: Mar 2015
Posts: 4
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4.0 with one lean cylinder from reading plug
Hi all,
I started my error hunt from a P2098 and P2096 code in my 2005 4.0 with the auto that is new to me with 194k. The jeep seems to be running fine although lugs a bit when the trans shifts into overdrive, but I figure that may be normal with slightly bigger tires (31 in) and stock gears. I just cross-countried 8000 miles with the code.
My #3 plug looks lean I think. (It is very white and crusty). I figured it may be a bum fuel injector, but after swapping the fuel injectors the problem did not follow the old #3 injector. I think the injector is getting a good signal, as my multimeter showed similar values on the #3 and other suspected good cylinders. I have not checked fuel pressure yet, but plan on it soon once I get the correct adapter to measure it on the 2005 that doesn't have a test port. Any thoughts on the cause? Is it normal for the #3 cylinder to look any different?
I understand that the original error code could be caused by bad O2 sensors or maybe even an outdated PCM, but I am currently fixated on my plug-reading. I don't think I have any vacuum or exhaust leaks.
Thanks,
Doug
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