bumping this post, it had nothing to do with temp, the jeep cranks fine ( new starter ) but takes about 1 minute of cranking to finally start, the check engine light comes on right as it begins to start, then shuts off, after it starts the jeep burbles for a few seconds, then runs PERFECT
im going to do normal ignition stuff today, cap and rotor, check wires, and check some vacuum stuff
hmmmm, you need a spark tester. So you can see what its doing while its cranking, maybe the spark is weak, wouldnt make sense that just all of a sudden it gets spark and starts though.
found this
Well I think I finally found the problem but still haven't gotten around to fixing it yet. The jeep is my DD in the winter when it's crappy out and I couldn't take the chance of not having it for a couple of days. What I found was my fuel pressure at the rail is at about 80psi when running. It should only be 35ish. I changed the regulator and that didn't do anything. Basically what is going on when I first try to start the jeep the cylinders get flooded with massive amounts of fuel and has a hard time firing. What I've got is a pinched return line somewhere right around where the lines enter the tank. The skid plate looks kinda rusty so I wasn't sure how many days it would take for me to drop the tank and everything to inspect. So I should hopefully be getting to it soon since spring offically started yesterday. I will keep you posted on my findings!
for the hell of it use a hair dryer to warm up your ECU next time its cold. I have seen that problem before.
This is it i believe , found out caps go bad imon ecm, 5 dollars at RadioShack to fix it, The jeep wont start until the CE comes on, then it fires perfect
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