Hello folks
The truck is a 3500 4x4 and can run a 100 mph in the quarter mile.
It has beaten a ford lightng in a drag strip race a couple of times.
The transmission is a Goeran/DTT hybrid I have a different turbo and a few other things to make it pull a fifth wheel camper and run the race track well.

Now the bad news.
Recently on a return trip to WI from Fl we where pulling a 26 ft goose neck with a Farmall SMTA on the trailer and the truck started acting up.
It would cut off and then refire and take off like nothing happened. I have gages in the truck so I was seeing 22 psi fuel pressure ( MADUSA after market fuel pump)

How can I tell if I have bad Fuel injector/s on this engine??
I would rather not get a set of new injectors to find that that was not the problem.
Thanks for any and all help figuring out this problem.
See Ya
Chris

 

Pull the codes on it via the key on and off trick. This does not sound like bad injectors. If you had bad injectors you would either have fuel in your oil or a dead miss. There is a wire that can ground out cutting out the Camshaft position sensor signal. It's the wire going pass the A/C compressor lines just above the compressor, can't miss it. It will chaff and cause this issue. Put some plastic wire loom around it after you electrical tape the bare wire. Hope this helps.

 

I had a similar issue with mine not to long ago. Mine would stumble at idle and then pick back up again like nothing had happened. I have a MITUSA pump running at 16 psi. It would not set any codes and only do it after 30 minutes of driving in 90+ degree heat. I was suspecting a sticking FCA so I installed the Arson III kit and it hasn't happened since. Hope you get out cheap and don't have to bite the bullet for injectors. Good luck.

 

Thanks
I will check those ideas out. I sure hope that is all it is. It makes sense with everything computerized.

6.6IEATER I had the name wrong for the fuel pump mine is also the MadeInTheUSA (MITUSA) fuel pump.

I got to find time to get back on this site more.
See Ya
Chris

 

It that dosen't fix it then it is a possible FCA issue on the CP3.

 

Update
I looked at the wires didn't see any bare spots, but I did move them from where they were to the other side of the AC compressor and took her for a 30 mile test drive.
I did not hear or feel the problem.
Tomorrow night I will have my wife drive the truck to Lake City Fl for some Sonney's BBQ and see if she hears or feels anything. It's about 45 min away and that will be a good test.
I will then look the wires over closely and let you know if I do have a bad spot. Friday night I will be getting her ready to pull that SMTA up to a tractor show in Lake Park Ga. bright and early sat morning.

What puzzles me is what does the wires going to the AC compressor have to do with the Cam shaft position sensors?

THANKS AGAIN for the help on this issue
See Ya
Chris

 

Dumb question
What is the FCA?
Thanks
Chris

 

FCA- fuel control actuator. Its the 2 wire solenoid looking thing on the back side of your cp3/ injection pump.

 

From a different thread

 

The same 5 Volts that the wire supplies to the A/C is also used for the Cam position sensor. If it gets grounded, both go dead. It should kick a code out though. Tape the wire in the daylight, the sheathing will have some slight wear on it where it has been rubbing.

 

My money's on the FCA - especially if no other codes are generated... fairly common to pass minute detritus through it's "valve" (like after running bio or dirty fuel).

FCA issues can be intermittent as well - moisture in the bus connector (pressure washing engine deep-water fjords monsoon driving) can make it run weird 'til it drys out.

 

Happy Camper again
We ran the truck for just under 200 miles yesterday and all is fine.

I will get under her today and get a good look at those wires. I have some plastic wire loom left over from something, I might just slip that on and call it job complete.

This truck is not a victim of being overly washed and as far fording water, we haven't had to do that ether.

Now I guess I will put new injector back on the want list.

Thanks again for the help.
See Ya
Chris