dude check out my thread, 96 centurion diesel, its right under yours.....im having the same problem right now.......looking like a fuel pump for me...I just replaced my PMD with flight systems PMD and Leroy's relocation kit and I'm still getting code 35 and 36? Any suggestions?
injection......those two codes are from the fuel solenoid in the fuel pump that can not be replaced without changing pump. there is a list of other stuff to check before condemning the pump, i have done almost all of the checks and still getting code.....which one the lift pump or injection pump?
ok ill try all that tomorrow and ill let you knowChecking the circuit wiring that will cause a DTC 35 and or DTC 36.
Unplug the PMD conn. and the 32 pin pink PCM conn.
Check for continuity between -
"C2" on the 32 pin pink PCM conn. (RED WIRE ) It will be on the second hole in from the end
and the only solid red wire on the connector.
And "E" on the PMD conn. (RED WIRE) the one between the pink and black wires,
the letters A thru F are on the connector in case you have all same color wires.
You should have continuity, if not there is the problem.
Have a helper wiggle the harness under the intake and at the back of the engine near the fuel filter while checking to reveal any intermittent shorts or bad connections.
Also check that circuit for continuity to ground (a short to ground), should be none.
i've already pulled the fuel filter and checked the filter and there is no signs of water or bacteria. i've noticed today that going about 50mph and white smoke just pouring out the exhaust pipe but nothing until you get up to that point. seems low power and check engine light comes on. the PO changed the lift pump right before i bought it and he has rigged up a switch to power the lift pump so i don't have the ops/lift pump issues. seems to all be using the correct wiring and what not. frustrating.
Well I bought the truck running good and I've never dropped the tank so unless it replaced itself I don't the sock is the wrong one but contamination might be an issue for sure. Right now I'm trying to rule out electrical gremlins.See "Fuel Supply System Checks."
Start at the source, the fuel tank, and work forward, repair or replace anything that might raise some doubt..... particularly you need to check for a partially restricted strainer or incorrect (gasoline) sock.
While R&Ring faulty lift pump, supposed to do a voltage check to ensure sufficient voltage is reaching the lift pump. Also supposed to drop and clean the tank while inspecting the sender and replacing the strainer and OPS. Most folks skip all that and just treat the obvious without giving little thought as to any of the possible causes that may have contributed to its failure prematurely..
Change Lift pumps and FFM filters all day wont fix a restricted fuel supply due to a clogged fuel strainer.
Alot of folks replace the sender, unaware that 99.9% of them come pre-assembled with the wrong (gas) sock. IF you do NOT purchase Acdelco TS 1012 fuel strainer and properly install it yourself leaves a BIG DOUBT.
Making assumptions has cost hundreds of thousands of misdiagnosed IPs...
Dont be that guy..
so you're suggesting using 15% bio is not good plus using 2 stroke oil? so how do i clean this ip armature? and it doesn't run ok. it blows out white smoke and going down the highway at 60+ it's like it is cutting out jerking back and forth.Found your problem.
IP armature is sticking. IP is bad if you can't clean it out, codes really don't hurt anything if it runs OK.
Ahhh, the ever popular "Scared Straight Program." Strap that lil Censored to the bumper.. Hows that workin' out for ya.My PMD is behind my bumper now
:banghead: See step 1, do it... HOPEFULLY youll have a different result, considering the costlier alternatives..Update - I installed a clear tube from the IP to the return line and and no bubbles. Only thing is how much pressure is supposed to come out of that IP fitting cause its like kinda drizzles out not much pressure.