Question about 1991 Ford F150
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Posted on Jan 02, 2017
I would check the oil pressure of the engine. The reason is the timing chain tensioners are run with oil pressrue. I think your timing chain tensioners are leaking down when engine is getting to operating tempature . The oil is thinning down as warms up , as it should to lubercate . I would check compression and do a cylinder leak down test on all the cylinders. Then if the compression is good and the cylinder leak down is good. I would change all the timing components, ( chain, timing gears, timing chain tensioners )
Good Luck , I hope this helps.
Posted on Apr 18, 2009
I am a Ford dealer Tech and this is what cures this issue most of the time.
, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Posted on Jul 01, 2009
The battery is there to start the vehicle, once running the alternator takes over and provides the power for all electrical. It sounds like your alternator went out on you. Thats is where I would start. Hope this helps
Posted on Oct 21, 2009
Testimonial: "Thank you very much. I'll start there. "
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