Scotty I contact the mechanic at the shop and he has checked everything from compression to every sensor,etc. in addition to what I have told you in my previous question. Following your advice I feel better that the mechanic is genuinely trying to fix my truck. I thank you for you advice and assistance. I was wondering about an add on accessory and the possibility that it may be a culprit. It is an after market cruise control. This item for the lack of a knowledgeable term a computer module that is communicating with the speed sensors in the pcm which also is a computer module. Could there be a problem with the two modules communicating causing the lack proper computer communication causing the vehicle to lose power and speed. The vehicle is now running with no cel or codes but while driving it will lose power spit and sputter and if you let off the accelerator the engine will pick back up and run properly until it decides to repeat the malfunction? The mechanis has also replaced the coil pack, camshaft position sensor and the crankshaft position sensor. All other sensors seem to be fine and there is nothing else to replace. Fuel pressure is up to specifications and clear fuel will run through the fuel rail when valve is removed for testing flow. This truck is definitely a challenge. Hope to hear your opinions and advice. Best Regards, Charlie

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Believe231
Believe231

Start with disconnecting the aftermarket cruise, it may be shorting out and affecting the factory ecu's ability to function.

ckmkmm96
ckmkmm96

Scotty, The mechanic had told me he did that and the fuel pressure was at normal psi (60 or so I think). I will check with him and advise you further. Thanks Charlie

Carquestions
Carquestions

There is no question about this - take off any and all aftermarket products asap - and if the engine loses power, spits and sputters - it MUST be a fuel or ignition issue or another system affecting them to stop functioning like the pcm - there are no other systems that will cause this to happen so have the mechanic drive the truck with a fuel gauge hooked up and see what is going on with the fuel pressure when it is sputtering - let me know the result

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