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NEED HELP 95 Pstroke won't start

3K views 14 replies 7 participants last post by  cndrm 
#1 ·
I have a 95 powerstroke and the other night I drove it home, shut it off and plugged it up. Then I went out the next morning and the truck won't start. It will crank over but it won't fire. The wait to start light isn't coming on at all and the overdrive light is on. I have checked all the fuses and they are all good. I have replaced the glow plug relay, and checked the power to and from the relay and it is good. I also replaced the pcm thinking that was it, but it didn't help either. When I try to hook a code reader up to it, it tells me to check the connection to the reader's cable and verify that the key is on. But the key is on the cable is hooked up right because it lights up the code reader but it can't read any codes from the pcm. I checked the injector harness and the wires that go to the two injectors and glow plugs in the front on the passenger side of the truck were burned up, so I replaced the valve cover harness the plug to it, and the wires to the injectors. But I still haven't been able to figure out the problem. If someone can help me out I would greatly appreciate it, I am so pi**ed at it I am about to burn it to the ground. This is my only means of transportation and I love the truck but tired of not having nothing to drive. Any info will help, thanks
 
#2 ·
You say you have checked all the fuses. Does that include the fuses under the hood and in the dash? If so take them out one by one and check them and reseat them or replace if you find one that is bad. Do not rely on those silly yellow testers. Use a real multimeter set to continuity and check each one. Been there and thought they were good and one was cooked under the plastic and I had missed it. If all checks out good then you may want to look into your ignition switch mounted on the steering column under the dash. They are prone to failure and even with good fuses you may not be supplying power to the PCM. That would explain why your code reader won't communicate with the PCM.
 
#4 ·
Thanks for the help I really appreciate it. I did actually check all the fuses that are under the dash and under the hood. And I have used a multimeter to check the fuses and all are showing good. I just don't understand why I drove it home from town and didn't have any problems but when I shut it off that night now it won't start. I am starting to lean towards the ignition switch like you said. I will try and replace that today and see what happens.
 
#5 ·
The problem Ford has had with their ignition switches is that even though the starter circuit is functioning fine it is that the other ignition legs off the switch aren't getting power in order to power the PCM. See if with the ignition in the run position if all of the fuses under the dash are getting power. That is an excellent indicator of whether or not the ignition switch is putting power to the PCM.
 
#6 ·
my sons truck had this same problem. turns out it was the ts chip. we took it out and it had no problems we put it back in and the problems happened again
 
#7 ·
my 96 did that. my ts chip was bad. they checked it didnt find anything. ran for a while after I put it back in then did it again. took it out then had it reburned for my 02 X and it wouldnt let them reburn it. got a new chip and they burned it and havent had a problem
 
#8 ·
OK, today checked all and had power to ECM and PCM. took both modules out and put them into another 7.3 and it fired right up and ran great. Put them back in and my unit would not start.

Again the history, wife took it with a loaded horse trailer on a 600 mile round trip. Ran great, no problems. Stopped to top off the tanks, then when she tried to start it, no go. It is a early 95, F350, 4 x 4, 5 spd, 7.3, crewcab, 163,000 miles. Code F. When you turn it over, it sounds like it is trying to start but won't. Watching the exhaust pipe, first white smoke comes out then black then grey. We are stumped. Cannot get any codes out of it. What is the starting fuel pressure and does anyone know where I can get an online wiring diagram?

Any help would be appreciated--- Thanks for all the response
 
#9 ·
Jud,
Have you checked your fuel filter??? Cleaned the FPR screen? could it be just crappy fuel??? Could be the under valve cover wiring harness.. The HPOP must be full because you are getting smoke so the injectors are firing. This is baffeling... Fuel pressure is a good question, sorry I don't have an answer on that one. If you have a TS chip, remove it and then try it out..
 
#10 ·
Does the tach move when you crank the motor over? The CPS could have crapped out. If it died, then the motor will not start.

I'd also change out the fuel filter, and clean out the FPR screen.

mike
 
#12 ·
Attached to the fuel filter housing is the Fpr Fuel Pressure Regulator,its the big valve body on the right side.Its attached by two bolts, take them out...careful not to lose the little black o-ring, pry the fpr from the filter housing. (Dont need to un-hook all of the hoses because you only need to move it away from the filter housing about 2 1/2 inches)After doing that you should see a small screen, most likely covered by black stuff.Take a flat screw driver or something like that and easily remove the stuff.Then re-install it, and be careful of the o-ring.There is going to be some fuel leakage so have a rag or something underneath in the valley,...and take the fuel filter cover off to relieve pressure first.Good Luck...
 
#13 ·
^^ There you go. I've also heard of someone using Q-tips, a mirror, and a flashlight, and just going in through the fuel filter bowl. (I don't remember where this post was)

Either way, just clean off the screen. It certainly won't hurt anything.

mike
 
#14 ·
Pulled the screen and cleaned it, covered with black, still won't start. I believe we may have found a bad fuel pump, will replace it tomorrow or next day. will advise if that is the problem. One question, we cannot pull any codes using an OBT II reader, any clues??

Again thanks for all the help
 
#15 ·
Yep. You've got a '95 truck. You have an OBD II port, but your truck only has OBD I programming. Vehicle manufacturers were required federally to have OBD II in '96. And any vehicle that's '94 and older, only has OBD I port and programming. The '95 model year is the "tween" if you will.

I've "heard", that the PCM can be reflashed, and told that it's a '96, and it'll run OBD II programming, and allow the use of standard OBD II code readers etc. I don't know if this is true.

Also, I've "heard", that the PCM can be replaced with a '96 model year PCM, and it'll do the same as the above. It'll allow OBD II programming to run etc. Again, I don't know if this is fact or not. And I don't know if it'll work or not.

So, if anybody has any experience with the change out, please chime in.

mike
 
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