99 6.5 intermittent surge and/or no throttle response

[busman]

Help, I'm new to the board. 99 6.5 in a G 3500 series, 70k, auto trans. Came in 6 weeks ago, no codes, had an intermittent surge that I could duplicate several times. Lift pump & relay checked ok, talked dealership into warranty for injection pump/fsd replacement. 2 weeks on the street & it's back, no codes, now also complaining about no throttle response when applying throttle. Any thoughts or help appreciated.

[ChevyDooley]

Its the acp. Basically the pedal sensor is bad. Happens alot. Mine is doin it now. Try driving truck with cruise control on and verify when it doesnt surge anymore.

[kowsoc]

I know the APP is sealed but I carefully drilled a small hole in mine to spray some contact cleaner inside. If you know yours is bad you could try this also and see if it works for you....save a couple of C-notes. ;) Mine's about 2 years and still going strong. Just make sure to seal the hole up again to keep dust out.

[busman]

Thanks for the replies. I will test app thoroughly, and try the contact cleaner fix.

[ChevyDooley]

I just fixed mine today yay!!! I drilled two holes in the black sensor piece. 1 in the centerish area and one more to the outside. Both on the outsidemost side of the sensor. I filled it up with non-conductive electronic cleaner and drained. I used gasket sealer to plug the holes (very small pin holes) and it works perfect now!!