its a 2001 Dodge 2500 cumming 24 valve turbo diesel 4X4,3/4 ton

but when i let off the gas pedal it shifts what is it

The engine continues to have multiple misfires ever since It was installed in 2005. I'm running a MSD 6A ignition and just replaced the coil, battery, alternator, plugs (stock plugs), belt, cap and rotor. All the sensors on the throttle body have been replaced too.
It does it mainly at low rpm. Fuel pressure checks out good.
Any ideas?

It goes back up to about 28 lbs when rpm reaches 1000 or more.

My truck is vibrating on acceleration and I would like to get an estimate for replacing the u-joints

The high beams won't turn on. Replaced the bulbs, still don't work. The high beam indicator light will come on but not the high beams themselves?????

Multi-function switch was replaced. What else could be broke?

I know P code 1693 is a companion code... I used a snap on scanner and it said no communication. could not get any other codes out either.. I have replaced ecm on fire wall, still no start.. How can i find out what it is if scanner wont pickup any codes ?? We know the scanner works.. Pcm on side of block what does that control ? Injector pump ?? NEED HELP !!

I have changed fluid & filter.changed vss sensor,even ran w/overdrive off didn't help. seems fine at highway speed,only does it at rpm range when it should shift!

This "Squeeking" sounds like a bearing squeek or when a brake pad is "Glazed", It rolls with the truck ,picks up with higher speeds,quiets when applying brakes, may come back on when turning steering wheel or even just driving straight.I have stopped truck and pumped brakes "hard" and seems to stay quiet longer ................loose brake pad(s) ????????

Truck will slightly surge forward when my foot is on the brake as I come to a stop or as I release the brake before hitting the accelerator. Symptom occurs irradically and sometimes the surge is more pronounced than others. This is not an engine surge it is a vehichle surge. No codes are present. No mechanic thus far can offer a solution.

we have checked all the fuses and bulbs and chased the wires down to the break lights are and still haven't found anything wrong can you please help

After it was replaced then he started having trouble with the transmission. We have had to replace the fuel pump twice more. Once the truck warms up he can get it to go in first and he manually changes to 2nd and third but it never goes to fourth. He changed the transmission fluid and it was clean, not metal on the magnet. Could it be a sensor? Also could the fuel pump going out be related to the transmission not working properly. Thanks

transmission slips in and out of overdrive have been advised to get it rebuilt

All was fine yesterday and today my speedometer, power windows and A/C all do not work and... now my ABS and airbag lights are on.??