Thread: Truck acting up
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Old 01-15-2013, 05:33 PM
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I think you need to rule out some other causes before condemning the PCM. What's the fuel pressure and volume look like? Has the plenum pan gasket ever been replaced? How old and what's the condition of the secondary ignition? Are the O2 sensors switching like they should or is one stuck at the same voltage all the time? Have you verified cam/crank timing? These are some of the things that could be causing your problem but certainly not all of them and they need to be checked as potential causes.
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