01 cummins small miss
 

I have a 01 cummins with a ppe lift pump and a diablo powerpuck truck runs strong but about 50-75mph it has a miss too it i changed the fuel filter today and run some injector cleaner thru it also can someone point me in the right direction

I would remove the powerpuck and see if that changes anything. What fuel pressure are you seeing from your LP?

I dont have a fuel pressure gauge i m gonna put one on it where would it tap into my pump is on the frame rail

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Holding it steady at 70it feels like a small hesatation than when you put the pedal too the floor its gpt all kinds of power

You can buy an adapter to plumb in the FP sending unit at the inlet of the VP. This will give you the best reading of FP.

Does your RPM gauge represent the miss?

yes the rpm does slightly jump during the miss when you stomp on it though its got all kinds of power

Could it be a tps maybe

It could be, it could also be your Camshaft Sensor.

How can i rule them out i dont have a cel on or anything

Try the below procedure and see if helps any. :tu: