2001 Mustang 3.8L random miss
frank58
03-23-2009, 10:39 PM
130K No cats, no sims , new wires and plugs the old plugs were clean and normal. Fuel pressure 50psi, have road tested will miss randomly at idle-or under load. Will stop if AFS is unpluged but will come back. Its a new AFS. Check air bypass, EGR and replaced eletronic control sensor for EGR. Cleaned throtle body. Vacume reading 17in. Motor has a squek. Have removed belt to try and find squek. Sounds like lifter area. Will do compression test next.
frank58
03-26-2009, 10:54 PM
PCM had chip in it for many years. Removed chip and all is well.
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