Got a friend's pickup at my place trying to get it going again. It's a 95 F250 with e-fuel, Farmer's Diesel injectors (somewhere around 300cc w/100% nozzles I believe), Terminator dual HPOPs, Tyrant tunes, S468 turbo, etc. When I picked the truck up the problem was it wouldn't crank... when you hit the key the starter relay on the fender would smoke. That problem has been resolved, but now the truck won't run. It has run twice for about 3 minutes, but the majority of the time it will crank and crank and crank but NO smoke from the exhaust, no cough, no sputter, no anything. Here's what I have done so far:

Checked all fuses (ad nauseum)
Swapped PCM relay
Swapped CPS (3 different sensors, multiple swaps)
Tried starting with and without ICP plugged in
Checked UVCH's, replaced passenger side due to burned UVCH/gasket
No fuel in coolant
No fuel in oil
HPO reservoir is full
Oil pan is full
Fuel is full
Fuel PSI is 65-67
Tried starting with and without chip installed
Cleaned IPR
Swapped IPR
Checked voltage at IPR plug

My truck starts and runs fine with his PCM, IDM and his IPR harness in my truck so those 3 things are good. Since this is a 95 AutoEnginuity has major heart burn trying to talk to the PCM, I have not been able to get AE to connect, even after calling AE and trying different settings and such with them on the phone while I was in the truck.

WHEN it runs, it runs fine, but only for 3-4 minutes then dies like the key has been shut off. I did ohm test the injectors and they ohmed out high, but they all ohmed out high and the readings between injectors were similar so I'm thinking my multimeter must have been having a bad moment or something. I'm at a loss for what to look for or try next. Suggestions would be highly appreciated!

 

Hi Chase, without a scanner it's going to be difficult. Does it have e-fuel or OEM mechanical pump? If it was me, think I would put your PCM in his truck long enough to get some data from AE.

 

You trying to start it with our without tunes?

Scangauge would be good here if you had one. They don't fuss trying to check things with the older trucks.

I'd check the map sensor too just for luck.

Only other thing I can think of is the magnet for the IPR failing.
At least that's easy to pull and swap to check.

 

Last link in my signature might help. Battery voltage at least 10.5? Starter cranks at least 100 RPM?

The OBDII standard was implemented in 1996/1997 - after the truck was manufactured.

Just dropping by for my $0.02.

 

It has e fuel, pump runs and makes good psi, no air in the fuel lines as best I can tell.

Did you read my post at all? I've tried with and without the chip installed, and with 2 different IPR's. How would a bad MAP sensor cause a no start?

Yes and yes.

 

I missed it, no need to be a dick.

Go ask your buddies over at FDP if you wanna act that way.

 

If you think that is me being a dick... boy do you have a lot to learn! Reading your response it seemed like you skimmed my original post, at best and in true Talyn fashion threw out something random like checking a MAP sensor for a no-start issue...

 

copy that on Rich w/ the OBDII..and as far as swapping parts, its more prudent to take the suspected bad part and put it a good, working vehicle to see if it works instead of blowing out the good part in a bad car that might have other issues to blow out the good part. You seem to have covered most bases but more info is needed.

 

I'm aware that OBD2 wasn't implemented until 96. MY95 owners were supposed to get a PCM re-flash that would allow the PCM to communicate via the OBD2 port... either this truck didn't get that flash or it's just being a stubborn POS. I got AE to connect once and show me ICP and IPR DC% but since then I haven't had any luck at all.
And you are 100% spot on about putting good parts in a suspected bad rig, which is why I haven't put my PCM in his truck... if there is a wiring issue somewhere under the hood I don't want to fry my PCM and have my truck dead in the water. That's why I installed his PCM, IDM, and IPR harness in my truck to see if it would still run.
At this point it's pretty much narrowed down to a HPO issue (not likely since the HPO system seems to be functioning properly) or an injector issue.

 

Just for kicks, try swapping the GPR.

 

Sorry 'bout that, I'll back off on the beers...bad day w/ my 250 today.

 

Try his PCM in your truck again, and try the AE on it, just to confirm that the comm issue is with the '95 PCM.

If the '95 PCM runs in your truck, it's probably not fried, thus you're _probably_ safe with your PCM in his truck. Still your call.....

 

Is it possible to swap the whole under hood wiring harness, or is his changed up with his upgrades? Then maybe try your pcm too if that doesn't work, then hook up AE again? Isn't there an idm relay too? Just some thoughts.

 

I could swap the entire harness, but that's a fair bit of work when I could just as easily unplug it at the 42 pin connector and do a continuity test on the wiring for the injectors and IDM.
IDM relay is a possibility, I think that's one of the 5 in the under hood fuse box. Can't hurt to try at this point...

Usaman- no worries man!

madpogue- The PCM can't be fried, my truck fired right up and idled/revved up fine. It wouldn't clean up at WOT but I have stage 1's and I didn't have my chip plugged in. I could try his PCM in my truck with AE, but he has had problems in the past getting AE to play nice on that pickup, its not a new issue. It's a 95 thing.

 

Chase I just taking a guess here since you've tried everything I can think of but have you checked the CPS wiring ?