need help bad!!!
#1
need help bad!!!
1997 with 4.0 runs good for awhile then starts smothering out and eventually quits. After sitting a couple minutes, it will usually start up and run fine for a few miles. Replaced entire EVAP system, fuel pump, coil pack.It's not throwing any codes and this has been going on for months. Sometimes it runs great for a week before acting up again, sometimes does it immediately after restarting. I think there's a "ghost in the machine". I love my truck but am getting frustrated to the point of getting rid of it! Can any one help?
#2
Have you changed the Crankshaft Positioning Sensor? If so computer or wiring harness issue, possibly. Find out what you're missing in the equation: spark, fuel or compression.
Compression issues are usually problems that will exist consistently, so it is probably not that.
Spark and Fuel can be intermittent if an electrical component is failing or if there is an inconsistent signal transmitted or produced by the computer.
Compression issues are usually problems that will exist consistently, so it is probably not that.
Spark and Fuel can be intermittent if an electrical component is failing or if there is an inconsistent signal transmitted or produced by the computer.
Last edited by jtkonieczny; 07-22-2012 at 11:19 PM.
#4
It does it intermittently whether driving at speed or idling although I figured out how to make it do this anytime by getting on the brakes hard. I changed the brake booster but didn't help, it will still do this with the booster unhooked. I guess I'll try the crankshaft positioning sensor next.
#7
#9
It does it intermittently whether driving at speed or idling although I figured out how to make it do this anytime by getting on the brakes hard. I changed the brake booster but didn't help, it will still do this with the booster unhooked. I guess I'll try the crankshaft positioning sensor next.
I had a pretty bad vacuum leak on my truck, and found/fixed everything like this.
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