Random Shutdown, any ideas?
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Random Shutdown, any ideas?
Hey guys, my stock 95 started acting up on me. I was driving down the road, after pulling a chevy so the ego probably had some effect on this haha, when it just shut down like I turned the key. The check engine light came on. I pulled it home, with a chevy so it was kinda a karma thing, and thought it was the crank sensor. I replaced it, and it still didn't run. So I messed around with the relays in the PCM and when I swapped the IDM relay it ran. Problem solved right? Well I wish. I then drove it about 10 minutes up the road and it did it again. This time swapping sensors and relays did nothing. I then took the IDM out and tried it in my buddies truck and it ran. After that I put it back in my truck and it also ran. I put another IDM in my truck thinking that it was getting hot and shorting out and when it would cool off it would run but it shut off with that IDM too. It has not shown a check engine light since the first time, and im really lost. This whole electrical issues thing has me worried, but any ideas? Its full of oil, with less than a thousand miles on the change.I also replaced the lift pump this winter, and its full of fuel. Would the codes from the first light be stored on the computer after a week? Im open to any ideas at this point cause I gotta get that truck running again! Thanks a lot guys, I appreciate it!
Last edited by whitefarmboy; Jul 7, 2014 at 07:01 AM. Reason: I forgot some important info the first time
Post Fiend
Joined: Dec 2010
Posts: 10,121
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From: Orrville, Ohio
The codes should still be in the PCM, so try and get those codes pulled and post them up here. Without the codes, we're just guessing. If I had to wager a guess I would say you're seeing a sticking IPR, but that is just a guess.
Lead Driver
Joined: Oct 2003
Posts: 8,476
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From: Madison, WI
The truck has a cam sensor, not a crank sensor. What brand of CPS did you remove, and what brand did you replace it with?
When it fails, and you try to restart it, does the tach move?
Codes would indeed shed some light.
When it fails, and you try to restart it, does the tach move?
Codes would indeed shed some light.
Lead Driver
Joined: Mar 2006
Posts: 5,111
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From: western SD
I'm with Nate on this. My 96 C&C would shut down randomly, and would throw an IPR above or below the required amount code. Checked the IPR and the nut and spacer were MIA. A different IPR and all was good.
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I removed a motorcraft sensor and replaced it with a duralast, the ford garage was closed through all this so I was just trying to troubleshoot. I will get the codes read as soon as I am around the truck again and get them up here. The tach does indeed move, which leads to to think it is not the cam sensor, based on my neighbors knowledge because he knows a lot more about these engines than I do. Ive worked on a lot of diesels, but they were all farm tractors, nothing like this nightmare.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
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From: Celaya, Gto. MX
I removed a motorcraft sensor and replaced it with a duralast, the ford garage was closed through all this so I was just trying to troubleshoot. I will get the codes read as soon as I am around the truck again and get them up here. The tach does indeed move, which leads to to think it is not the cam sensor, based on my neighbors knowledge because he knows a lot more about these engines than I do. Ive worked on a lot of diesels, but they were all farm tractors, nothing like this nightmare.
The aftermaket CPS are known as they fail out of the box. Just my 0.02
Hotshot
Joined: Mar 2012
Posts: 10,590
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From: Texas
I also had this same scenario just last week. Check the wires going to he back of the IPR...or better yet...see if it will start and then touch or jiggle those wires and see if it dies. Mine had the exact same symptoms you are describing and I found the the wire insulation had disitegrated away and the wires touching each other causing the truck to die and not start. I took off the pigtail, re-insulated the wires and it has been good ever since. This is a 5 minute fix. I would try this before anything else.
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Hey guys I took a short look at my truck this evening after I got my hay all baled. I unplugged the IPR and saw that the O-ring in the end of the plug looks deteriorated. I could see no problems with the wires though. I was wondering if the IPR could have went bad from a fuel leak eating the plugs apart. I still haven't had any luck with a scanner as my neighbor that has one was away with work today.
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I did some more playing today. I found that the IPR was loose, so I tightened it down and started my truck. It ran really rough but I thought it was air in the fuel from me taking lines off to get the IPR tight. I ran it and made sure it was good and hot, and it was the longest it stayed running since the problem started. I then began investigating why it idled rough and discovered that I had unhooked the front plug from the drivers head. I plugged it in started it up and she ran like a dream, until I pushed the throttle and it then died almost immediately with no CEL. I got the code reader and all it will do is say link error. Is it possible that there could be a short in those injector wires or the valve cover wires that would cause it to randomly do this? Also is it possible that my truck is not OBDII since it is pre 96 and that's why the reader wont work? Im running out of ideas, and not having this things becoming a real inconvenience. I appreciate everything!
Laughing Gas
Joined: Feb 2010
Posts: 859
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From: Port Orchard, WA
Most OBDII scanners won't link to the powerstroke's PCM. I use the $12 bluetooth adapter with the $5 "Torque Pro" Android app with great success. See https://www.ford-trucks.com/forums/1...werstroke.html
And you are correct, your truck is not OBD-II compliant, but it does have an OBD-II plug. Rumor has it that if your truck has been dealer serviced since '96, then the PCM has probably been flashed to OBD-II compliance. I don't know, I just know that my '94 links fine.
If your ICP is low or broken, then the truck won't start. It requires like 500psi of high pressure oil to start, and it gets that information from the ICP. If you unplug the ICP, then the PCM will assume it's at 600psi, and the truck should start. Unplug the ICP and drive around, see if it ever dies on you. It's all the way forward on the driver's side head.
And you are correct, your truck is not OBD-II compliant, but it does have an OBD-II plug. Rumor has it that if your truck has been dealer serviced since '96, then the PCM has probably been flashed to OBD-II compliance. I don't know, I just know that my '94 links fine.
If your ICP is low or broken, then the truck won't start. It requires like 500psi of high pressure oil to start, and it gets that information from the ICP. If you unplug the ICP, then the PCM will assume it's at 600psi, and the truck should start. Unplug the ICP and drive around, see if it ever dies on you. It's all the way forward on the driver's side head.
Laughing Gas
Joined: Feb 2010
Posts: 859
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From: Port Orchard, WA
If the tack is moving, then your problem is most likely elsewhere.
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