Diesel versus gas maintance

Duffster · Dec 12, 2011

Soundguy said:
i think the cps would just leave you stranded till you grabed the 10mm wrench and spare part and changed it.

I had a CPS that would do just as sandman explained. It would should down or run porly. Start it back up and run fine for sometime hours and sometimes days.

Soundguy · Dec 12, 2011

but did it put you in 'limp' mode specifically? i don't think a faulty CPS would do that.

soundguy

sandman2234 · Dec 13, 2011

Duffster said:
I had a CPS that would do just as sandman explained. It would should down or run porly. Start it back up and run fine for sometime hours and sometimes days.

When the light goes on, the truck goes to idle and nothing you can do will make it accelerate. It pulls fine at idle, and never actually shut down. I was in the middle of 5 pm traffic when it did it the last time, and I just idle'd about 2 blocks before the light went out and it started running fine again. I went right by a small shop that has 3 diesel duallys sitting there almost all the time, and almost stopped, just because I wanted to know what was causing it, but opted to go a mile up the road to the auto parts store I generally use, but their scanner definitely was lacking in the diesel catagory.
David from jax

Soundguy · Dec 13, 2011

deffinately sound slike an induced limp mode...

sandman2234 · Dec 14, 2011

Soundguy said:
deffinately sounds like an induced limp mode...

What are the scenerios that would produce this "limp mode"? Just curious...
David from jax

Soundguy · Dec 14, 2011

i know if the ecu thinks something is getting too hot.. like trans, etc, it can kick into limp model. some trucks have a 'wrench' lamp that will come on which limits rpm and kicks out the turbo.. etc.

soundguy

VTFireftr · Dec 16, 2011

I had a 2001 7.3 and blew 2 CPS's. Both times the truck would not restart until the CPS was replaced. On our ambulances, same issue when the CPS goes away.

I'm guessing plugged fuel filter. Try replcing that. Pretty easy to do on the 7.3.

Could be you got some bad fuel that plugged the filter.

Again, I'm just guessing here.

Good luck.

Soundguy · Dec 16, 2011

same I've heard on the cps.. it's a stall / go / no go issue.

I keep one and a 10mm wrench in the glove box... taped together..

56FordGuy · Dec 16, 2011

Soundguy said:
same I've heard on the cps.. it's a stall / go / no go issue.

Sometimes, but not always. The CPS can create issues that seem completely unrelated to it. Keeping a spare CPS is a good idea, and it takes less than 5-10 minutes to swap it out. Wouldn't hurt to try it and just see what happens.