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After valve cover gaskets, coil boots, and two coil packs;
Survey says ....
replace the computer.
Codes previously thrown ...
p0606 - PCM / ECM Processor fault
p0308 - Cylinder 8 misfire detected
p0316 - misfire detected on startup (first 1000 rev)
p0358 - Ignition Coil H Primary/Secondary Circuit malfunction
These were pulled after coil 5 and valve-cover gaskets were replaced.
After replacing coil 8 and the remaining coil boots I reset the computer and saw marginal improvement. Engine light was off for about 200 miles, but it still wasn't right (no torque, higher rpm to maintain speed, didn't sound right under load).
Yesterday, engine light comes back on and starts flashing (again) and now it's difficult to pickup or maintain speed, still sounds off, and has started missing at idle and under load.
No oil has leaked into the sparkplug wells since replacing the gaskets.
Any thoughts?
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1999 Ford F-150 Lariat
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