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Can't figure out stuttering problem?!
Just bought a 2001 psd a month ago and this is my first post on this forum.
I'm having a problem with a hesitation that happens from 1500 rpm to 2200 rpm. It only happens in 4th and O/D under a load. It is most noticable in o/d and once it gets past a certain point it goes away.
The truck has 1500 miles on an oil change with rotella synthetic and about 400 miles on rev-x. Its got intake, stock straight pipe, had a 70 hp chip but i took it off so it could be scanned. It also has 80 hp diy injectors, i guess they are stock rebuilt with bigger nozzles i think. The turbo is a newer gtp38r with an upgrade impeler and no ebpv.
So far I have replaced the ICP(it had oil in it), CPS and done the Rev-x. I took it into a shop to have it looked at and it had good fuel pressure and the turbo and wastegate were good. They did a cylinder contribution test and number three failed. They had it for a week and thats all they figured out.
Thanks in advance