Thank you for a great video! I've been at my 1997 for about 2 months as well. It would die after warming up (and a new CPS didn't help). Now it cranks, bot doesn't fire and no smoke. New oil, fuel filter, and IPR valve haven't helped. I also can't communicate with the PCM with scan tools, but the Wait to Start light comes one. I'm now thinking my PCM and/or IDM is bad. Where did you get your rebuilt PCM from? I've heard good things about Diesel Technology of Chattanooga and thinking I should spend the money to have both my PCM and IDM bench tested and potentially replaced by them. Plus they can do a $150 performance flash of the PCM for some modest, safe gains.
Crank/no start and you can't communicate with the pcm makes me think it might be that. Make sure the cam sensor is working when cranking the rpms will move. I've had idms go bad too that could be it. I have 2 of the obs 7.3s so I swapped parts in and out until I figured out what was wrong. I was lucky and rock auto had the exact pcm I needed but local junk yards might have them but need the exact one for that truck. Good luck!
@@barnsandbrews Thank you! My CPS is new and working. I ended up shipping out my IDM and PCM to Chattanooga. We'll see what they find during bench testing. Fingers crossed they're not both working properly because I don't know what else it could be if it's not the electronics.
My truck started running real bad and i thought it was the valve cover gasget, after taking it a part , it wasnt the problem , a new IDM fixed it , it was basicically running on 4 cyl pesenger side , i found out by letting it warm up and the exhaust manifold on driver side stayed cold , hope this helps
So I am having a problem with mine as well it was half a tank Monday went and put some hotshot fuel treatment with filling her up ran great the whole day woke up Tuesday ran great to town got to the store heading home and shuts off didn’t want to start back up got home could have been the battery cables that was terrible replaced them then found out it wasn’t the cables so now it wasn’t getting fuel but the filter filled up so i knew it wasn’t the pump then got told the icp sensor needed to be checked if oil was on it that it was causing the fuel problem thoughts????
My 97 obs is having the same issue. One day just started running rough, then stalled out/died. It would crank but I couldn’t get it to fire back up. Did you ever figure out what the issue was?
Yeah that's what I thought too. I was running out of ideas and had a spare pcm from a different truck and it ran so I ordered the right pcm for the truck and it's been great ever since!
Hey,just viewed you video. Great content, I just got a 97 f350 and it's missing pcm and IDM that I will be purchasing. You wouldn't have a bracket for mounting a IDM for the 97?
Sometimes it’s a small thing I just put new battery cables in my truck and it runs smooth as silk now it was running really bad before i put them in chasing that for a long time cables were corroded on the inside of insulation crazy thing that I’ve never heard of before
Have i hooked up a scan tool on it, my IDM WENT BAD AND REPLACING IT FIXED IT , THE SEAL FOR THE IDM GOES BAD AFTER BEING SO OLD AND MOISTURE GETS IN , MY TRUCK WAS RUNNING ON 4 CYL ON PESSENGER SIDE AND NEW IDM FIXED IT
I have a 96 that starts easy cold and drives fine .. idle could be better.. but once it’s at operating temperature and I turn it off to go into a store or something it will not restart unless I give it some fuel into the turbo and it fires right up and drives fine again
Maybe air is getting in the fuel system. Could be many things. I'd check fuel pressure first. My truck would run for awhile fine too when warm then wouldn't be able to start it. Turned out to be pcm. Good luck!
If it starts probably not the valve cover gaskets. My guess would be start checking the sensors. Disconnect the icp see if it does the same thing. Could be ipr valve or cam shaft sensor or something else even
Hey I was wondering if you can help me, I have a 1996 ford f250 powerstroke it starts up great but not even a second later it does actually what you're does in the video but here's the kicker if I just hit the gas and riv it it goes away and runs great for a few weeks any advice?
Could be a lot of things. Mine was the pcm which would work sometimes then cut out. Could be fuel pressure if reving the truck fixes it, could be getting air in somewhere.
@@GeorgeCox-wv7rg my trucks doing the same thing I’ve replaced the idm, ipr, icp, cps, valve cover gaskets, and main wiring harness. I had my pcm repaired by someone on ebay but maybe it’s still the pcm. Any thoughts?
@@drewdeitemeyer3617 I narrowed it down to the fuel bowl harness which the ipr is a part of, or the pcm. Haven’t looked at it. Been too busy but I’m pretty sure it’s one of the 2 or both. The wiring probably got wet and shorted out under the fuel bowl. Or pcm is just old and needs to be redone by a real diesel pcm repair place. I’m 100% sure it electronic though.
i bought this obs 7.3 and it starts no problem, but sometimes it’ll start and sound like it has a lope, ive replaced the icp and dont know what else might help it, after i rev it a bit it stops and idles a bit rough.
Mine was doing that for a few months then started randomly shutting off then completely stopped running and wouldn't start, turned out to be the pcm, pulled it out and it was full of corrosion
Hey i have a 7.3L on a F350 im having hell getting it started. it will crank wont start. i replaced the IPR and the Cam Sensor. i unplugged the ICP to bypass that still didnt start. yesterday i drained the fuel bowl using the valve on the side. drained it went back to the ignite turned the key fired up INSTANTLY and died after 5 seconds. i went and got some diesel becuase i was at 1/4th a tank went to start it again FIRED right up. IDLED terrible! for like 5 minutes then the idle was fine i turned it off and started it again firing right up again running smooth. took it for a drive was perfect. came back the next day and the same thing as before cranks but wont start. ANY ideas? only has 131k miles on it
Sounds like it's either a fuel issue or something electrical. Maybe check the fuel pressure and make sure the bowl is filling up with fuel. Might be pulling air in somewhere in the fuel system. Is it an obs or newer body style 7.3? Check the clips on the valve cover gaskets too, those are what fire the injectors and maybe there's a short somewhere in the wiring. Although your issues do sound a lot like the problems I was having and my truck needed a new pcm. Good luck!
Dude I have no idea what’s wrong with my truck I just swapped a motor into my f350 it idles fine and sounds good but if I have it in neutral and rev it up to like 1500 rpm it starts to cut in and out like it’s running out of gas and when you drive it down the road it will start doing it about 2000rpm. I’ve changed so much stuff on this truck trying to fix it and still no luck. Hope it isn’t something internal. If anyone has a clue please help
Sounds like it's not getting fuel or airs getting in somewhere. One time I had something similar happen where I could drive about 50 miles then my truck would act like it ran out of fuel and wouldn't run. I'd let it sit and in about the same amount of time it would do it again. Turns out there's a screen filter in the fuel tank and that broke into a bunch of pieces so every once in awhile a piece would get stuck to the bottom of the sending unit and rob it of fuel. Hope you get it running!
My 97 obs is having the same issue. One day just started running rough, then stalled out/died. It would crank but I couldn’t get it to fire back up. Did you ever figure out what the issue was?
Glad you got her fixed,I'm chasing a miss on mine also hopefully I'll find the problem soon
It’s not fixed yet haha waiting on some parts! I will be posting videos as I chase down the issues
Hey put a Icp sensor on it that’s your problem
My 01 is doing the same what is the issue
Thank you for a great video! I've been at my 1997 for about 2 months as well. It would die after warming up (and a new CPS didn't help). Now it cranks, bot doesn't fire and no smoke. New oil, fuel filter, and IPR valve haven't helped. I also can't communicate with the PCM with scan tools, but the Wait to Start light comes one. I'm now thinking my PCM and/or IDM is bad. Where did you get your rebuilt PCM from? I've heard good things about Diesel Technology of Chattanooga and thinking I should spend the money to have both my PCM and IDM bench tested and potentially replaced by them. Plus they can do a $150 performance flash of the PCM for some modest, safe gains.
Crank/no start and you can't communicate with the pcm makes me think it might be that. Make sure the cam sensor is working when cranking the rpms will move. I've had idms go bad too that could be it. I have 2 of the obs 7.3s so I swapped parts in and out until I figured out what was wrong. I was lucky and rock auto had the exact pcm I needed but local junk yards might have them but need the exact one for that truck. Good luck!
@@barnsandbrews Thank you! My CPS is new and working. I ended up shipping out my IDM and PCM to Chattanooga. We'll see what they find during bench testing. Fingers crossed they're not both working properly because I don't know what else it could be if it's not the electronics.
My truck started running real bad and i thought it was the valve cover gasget, after taking it a part , it wasnt the problem , a new IDM fixed it , it was basicically running on 4 cyl pesenger side , i found out by letting it warm up and the exhaust manifold on driver side stayed cold , hope this helps
You should make more content you do a great job
So I am having a problem with mine as well it was half a tank Monday went and put some hotshot fuel treatment with filling her up ran great the whole day woke up Tuesday ran great to town got to the store heading home and shuts off didn’t want to start back up got home could have been the battery cables that was terrible replaced them then found out it wasn’t the cables so now it wasn’t getting fuel but the filter filled up so i knew it wasn’t the pump then got told the icp sensor needed to be checked if oil was on it that it was causing the fuel problem thoughts????
My 97 obs is having the same issue. One day just started running rough, then stalled out/died. It would crank but I couldn’t get it to fire back up. Did you ever figure out what the issue was?
It was his pcm, did you ever get it figuredout?
I would have guessed it was the IDM over the ECM. Especially since it appeared to be a whole bank misfiring.
i would have bet on IDM or valve cover gasket problems. good work fixing it. was PCM a guess?
Yeah that's what I thought too. I was running out of ideas and had a spare pcm from a different truck and it ran so I ordered the right pcm for the truck and it's been great ever since!
Hey,just viewed you video. Great content, I just got a 97 f350 and it's missing pcm and IDM that I will be purchasing. You wouldn't have a bracket for mounting a IDM for the 97?
Where did you get your pcm
Sometimes it’s a small thing I just put new battery cables in my truck and it runs smooth as silk now it was running really bad before i put them in chasing that for a long time cables were corroded on the inside of insulation crazy thing that I’ve never heard of before
Great job buddy 🙌
Have i hooked up a scan tool on it, my IDM WENT BAD AND REPLACING IT FIXED IT , THE SEAL FOR THE IDM GOES BAD AFTER BEING SO OLD AND MOISTURE GETS IN , MY TRUCK WAS RUNNING ON 4 CYL ON PESSENGER SIDE AND NEW IDM FIXED IT
Check the neutral safety switch.
No neutral safety switch on a manual 😅
@@themechanicman3865yes there is.
I have a 96 that starts easy cold and drives fine .. idle could be better.. but once it’s at operating temperature and I turn it off to go into a store or something it will not restart unless I give it some fuel into the turbo and it fires right up and drives fine again
Maybe air is getting in the fuel system. Could be many things. I'd check fuel pressure first. My truck would run for awhile fine too when warm then wouldn't be able to start it. Turned out to be pcm. Good luck!
@@barnsandbrews it would make sense about the pcm because most electrical issues get worse with heat
My truck also sounds like that but it starts up good do u think I should change the valve cover gasket or what else could it be?
If it starts probably not the valve cover gaskets. My guess would be start checking the sensors. Disconnect the icp see if it does the same thing. Could be ipr valve or cam shaft sensor or something else even
Hey I was wondering if you can help me, I have a 1996 ford f250 powerstroke it starts up great but not even a second later it does actually what you're does in the video but here's the kicker if I just hit the gas and riv it it goes away and runs great for a few weeks any advice?
Could be a lot of things. Mine was the pcm which would work sometimes then cut out. Could be fuel pressure if reving the truck fixes it, could be getting air in somewhere.
Can you keep making videos. I just found out my truck is 7.3 and I'm trying to get it running
What you need to no I work on the old truck for a living I got a 96 f250 7.3
@@GeorgeCox-wv7rg my trucks doing the same thing I’ve replaced the idm, ipr, icp, cps, valve cover gaskets, and main wiring harness. I had my pcm repaired by someone on ebay but maybe it’s still the pcm. Any thoughts?
@@ShakeJuntJr did you ever get it figured out?
@@drewdeitemeyer3617 I narrowed it down to the fuel bowl harness which the ipr is a part of, or the pcm. Haven’t looked at it. Been too busy but I’m pretty sure it’s one of the 2 or both. The wiring probably got wet and shorted out under the fuel bowl. Or pcm is just old and needs to be redone by a real diesel pcm repair place. I’m 100% sure it electronic though.
@@ShakeJuntJr okay thank you
Icp man it controls your feel pressure
i bought this obs 7.3 and it starts no problem, but sometimes it’ll start and sound like it has a lope, ive replaced the icp and dont know what else might help it, after i rev it a bit it stops and idles a bit rough.
I would have guessed icp too. Could be the cam position sensor or ipr valve. Although tough to say could be a lot of things
my 03 7.3 sounded just like that but cant hear my fuel pump prime any thoughts?
Does it not run or just run rough? Check your fuel bowl see if it's filling up with fuel. Could be a number of things.
Mine was doing that for a few months then started randomly shutting off then completely stopped running and wouldn't start, turned out to be the pcm, pulled it out and it was full of corrosion
Exactly what happened with mine. Pcm was full of corrosion
Hey i have a 7.3L on a F350 im having hell getting it started. it will crank wont start. i replaced the IPR and the Cam Sensor. i unplugged the ICP to bypass that still didnt start. yesterday i drained the fuel bowl using the valve on the side. drained it went back to the ignite turned the key fired up INSTANTLY and died after 5 seconds. i went and got some diesel becuase i was at 1/4th a tank went to start it again FIRED right up. IDLED terrible! for like 5 minutes then the idle was fine i turned it off and started it again firing right up again running smooth. took it for a drive was perfect. came back the next day and the same thing as before cranks but wont start. ANY ideas? only has 131k miles on it
Sounds like it's either a fuel issue or something electrical. Maybe check the fuel pressure and make sure the bowl is filling up with fuel. Might be pulling air in somewhere in the fuel system. Is it an obs or newer body style 7.3? Check the clips on the valve cover gaskets too, those are what fire the injectors and maybe there's a short somewhere in the wiring. Although your issues do sound a lot like the problems I was having and my truck needed a new pcm. Good luck!
Could be a failed crush washer on a injector.
Could be a failed crush washer on a injector.
Dude I have no idea what’s wrong with my truck I just swapped a motor into my f350 it idles fine and sounds good but if I have it in neutral and rev it up to like 1500 rpm it starts to cut in and out like it’s running out of gas and when you drive it down the road it will start doing it about 2000rpm. I’ve changed so much stuff on this truck trying to fix it and still no luck. Hope it isn’t something internal. If anyone has a clue please help
Sounds like it's not getting fuel or airs getting in somewhere. One time I had something similar happen where I could drive about 50 miles then my truck would act like it ran out of fuel and wouldn't run. I'd let it sit and in about the same amount of time it would do it again. Turns out there's a screen filter in the fuel tank and that broke into a bunch of pieces so every once in awhile a piece would get stuck to the bottom of the sending unit and rob it of fuel. Hope you get it running!
I got a 99 it acts like one whole side aint firing at all
That was my problem and turned out to be the PCM
My 97 obs is having the same issue. One day just started running rough, then stalled out/died. It would crank but I couldn’t get it to fire back up. Did you ever figure out what the issue was?
He said it was the computer at the very end, I already replaced mine and I'm still having this problem so let me know if you figured it out please