Engine/Transmission (1998.5 - 2002) truck will not start... Please help

[silverram323]

I just spent $700 at the dealer to tell me the ECM is bad. I bought the MARCO special ECM computer and hooked it up an the truck still will not start. I am not saying the MARCO special ECM computer is bad, just saying i have one now. The truck starts sometimes with the old ECM and then it dont start. No codes, 16 psi fuel, just cranks. I think I have another problem. Has anyone else had a problem? Any help would be great.

Kevin

 

[FourBarR]

you say you have 16 psi. where is this pressure taken from? is it pre filter or post filter. is fuel getting to the injection pump? bump the starter and check for fuel at the pump. if there is no fuel , is the filter plugged? if there is fuel ,crack 3 0f the injector lines and try starting, if there is fuel at the injector . it should start , and run rough.

 

[silverram323]

fuel pressure is tested 3'' from the vp44. I have a fass system. I did crack 3 injector line and fuel is comming out. .

 

[lsenus]

How about the crank trigger and/or sensor? Just throwing out ideas...

 

[silverram323]

lsenus, Thats a great idea... I have a friend that works at cummins and i had him come out and put the lap top computer on the truck. The only thing that we could see is a problem is there is no cam speed sensor rpm reading. We put a new sensor in and made no difference. We put a device on the VP44 to jumper (hot wire) the pump and the truck runs. I am in the process off getting the cam sensor out and checking out the gear behind there. He has heard of a bolt comming loose and the gear is to far away to get a reading. Any more ideas, I am all ears...



Ill keep you posted

kevin

 

[RustyJC]

The only thing that we could see is a problem is there is no cam speed sensor rpm reading. We put a new sensor in and made no difference. We put a device on the VP44 to jumper (hot wire) the pump and the truck runs.

If the sensor is good and the gap is correct, the problem could be in connectors (sensor & ECM), the wiring harness, etc.



Rusty

 

[Marco]

It's difficult for me to help you from here... .



First thing, does the wait to start light work correctly?

Are all the fuses in the PDC OK?

Just thinking out loud...

Could the new cam sensor have a problem? Been there done that...



Anyway, I've had a customer a couple years back that had a no start condition like yours. The shop had already changed the VP, ECM, Sensors...

at the end I found the engine harness to be bad. There is a joint in the harness about 10 inches down the VP. It was corrded... . Soldered all the wires, bingo!



Marco

 

[silverram323]

I will check all that out marco...

 

[SpicyJam]

Kevin that sucks. I was hoping that wasn't going to be the problem. After you left my house I wondered about the singnal. But since you told me you had a guy there testing things I figured that it would have been iliminated as far as that goes. You know the first time you had a problem was just after you pressure washed your engine, just wondering if you screwed up a connection somewhere. Well at least I can get my FASS wiring harness back. Keep us up to date on what you find out. Hope you get to come play next Sunday. Later Jim.

 

[RustyJC]

You know the first time you had a problem was just after you pressure washed your engine, just wondering if you screwed up a connection somewhere.

Further to my previous post, if I were a bettin' man, I'd say it's looking more and more like you have a corroded or wet connector in the wiring harness.



Rusty

 

[Marco]

the first time you had a problem was just after you pressure washed your engine

OH MAN!!! WHY do you wash the engine???? You guys with the clean engine bug have to understand that the oily grime protects all the electric contacts! Wash the engine and voilà the troubles start... . :{



Have you used a strong detergent too? I guess so...

Take out the whole engine harness check every single plug. Open the "protective" wrapping and watch out for all the joints... There's your problem, no doubt...



Clean engine... crazy people... :-laf



Marco

P. S. Never washed an engine... :--)

 

[SpicyJam]

OK, I am just giving a heads up here. Kevin just called me and the problem lies in his ignition switch. Apparently he disconnected the switch and hot wired his truck and it popped right off. So he is off joy riding with a couple of my other pals who are not at work either enjoying the rain... ... ... ... lol. Well guess a crappy day outside is better than a good day at work .

 

[Joseph Donnelly]

I've washed my 12 valve many times, but it don't need no stinkin' electrons



Haven't washed my 2004's engine yet, and was feeling guilty, until this thread.

Once again, the TDR saves me money

 

[FourBarR]

i have washed my 24 valve every two or three months . truck is now over 6 years old. never had a problem . two things i do blow off with air immediately, and spray every connector with acf 50 ,that we use on aircraft. i have corrected more electrical problems with this product than i can count. some day i may have a problem , but so far all ok . i hate dirt, working on aircraft can make you crazy, about things being clean.

 

[SpicyJam]

Ok here is the deal now, since Kevin is fishing and has his truck with him . After thinking and buying a ignition switch turned out that the 10 amp fuse in the power center would not take the draw of the starter, worn out , so after getting a new one in, all is good. Now hope he is not stuck with the big expense he has already paid out :{ , for a stupid breaker. At least he is a happy camper , and the Marco ECM is working, too bad he set a code hooking up his Comp on his way fishing, and is it cold outside, suppose to be in the teens tonight. :-laf ... ... ... ..... later dudes.

 

[silverram323]

Thanks Jim for relaying the updates via the cell phone. It turns out that a 10-amp fuse labeled ENGINE was half way burned out. There was a hairline crack in the top of the fuse. It would let all the lights and buzzers work but would not hold the current of the ignition switch. It sound stupid but you really have to look close to see it. (Note to self-check all fuses first) Marcos MADD ECM is awesome. It feels like having the comp on level 2. I must have a 2000 engine in the 2001 chassis because when I plug the edge comp in and go down the road and put it to the floor, the truck defuels and throws the computer in limp mode and sets 237,501,602 codes. I spoke to Doug at Advanced Diesel and every thing will be worked out. The only problem I have ever had with pressure washing my engine is the engine coolent temp shorts out and sets a code every time.



I owe Tim at Torque Diesel a BIG THANKS for all the help, Jim thanks for the fuel harness. Ohh i cant forget Josh Peters, Thanks.

kevin