What is your question?
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What is your question?
so about two months ago I replaced the plugs and starter on my 1999 Jeep grand cherokee 4WD 4.0 inline 6. About three weeks ago i was having trouble with the rpms jumping when the engine was cold, it'd rev up and down searching, and occasionally die and not start up due to a dead battery. Replaced the alternator and battery, both were no good, which solved the dead battery issue, then replaced the crankshaft sensor which seems to have fixed the rpm issue. but now occasionally when i go to start it, it'll take a bit to start, or it'll crank strong and not start at all on the first try. It always fires up eventually, but theres definitely something not right, thoughts?
What makes this problem better or worse?
only when cold
How long has your 1999 Jeep Grand Cherokee had this problem?
week
1 Reply
You need to take a look at fuel pressure when this is happening. You could have a weak pump. Also try priming the pump before you start. Just turn the key to position 2 for about 3 seconds and then start it. If that fixes it then the fuel pump is bleeding back. Alex