So I've been throwing some preventive maintenance parts at my PSD for a couple months now without much success, so I'm going to put my tail between my legs and ask for some help. I'll try to summarize what I've done so far in hopes somebody thinks of something I haven't thought of yet.
My truck is a 1996 Powerstroke, totally stock except for a TW Performance 6 position chip (I installed this to make the shift points nicer and I've never had it on anything but "stock" or "+40HP" position) and the big open air filter modification. The truck has a tick over 100K on it, and other than the trans being a little soft for the last 10K miles I've owned it, it's a pretty decent dually.
Over the last six months, it smoked heavily during cold starts, cleared up and ran fine when warm. It got worse and worse starting as the winter temps got colder, so around Christmas I decided that I'd swap to thinner oil to make it easier on my starter, and it smoked more on startup but seemed to run about the same. I stopped driving it as I try to keep the salt off of it over the winter months as much as possible, and I figured I'd put a set of injector orings in it to see if this helped the smokey cold starts. I used Alliant parts as it seemed like these were the best replacements. The old ones were a little hardened, I changed them all out, but didn't help much, and I parked it for about a month as it got cold and I got busy with the holidays. The next time I started it, I let it get warmed up and when I shut it off, it would start and run for about a second, and then shut off, like you turned the key off. If would do this as many times as you restarted it.
I figured maybe it was a bad IPR that was bleeding off too much pressure to fire the injectors when warm, so I rebuilt the IPR. It didn't look terrible (it was interesting that it didn't have a split backup ring on it, but it does now, again I used Alliant repair kit parts) but it didn't change anything and the warm engine shut off continued.
Then I figured I'd bite the bullet and buy a blue tooth adapter and take a look at the electronic data via Forscan. Nothing appears out of range, it never throws any codes, but the problem persists.
Last week I was convinced that maybe I had a bad TS Performance Chip, so I uninstalled it. No change, still shuts off when warmed up, no codes, etc.
If I had to guess, I'd say that maybe I have a bad ECU, but I'm getting tired of throwing parts at it so I figured I'd get some additional eyes and thoughts as I'm pretty used up and in reality there's way more diesel experience and insight on this forum than I have in my mushy brain.
All I know is that the engine starts cold, seems to run ok in the cold start "mechanical" start up mode, but something is killing it when it gets up to temperature. Something that doesn't give me any codes.
Let the input begin. I'm all ears at this point and I've got plenty of humble pie to serve myself for not figuring this out on my own, but I'll take any help I can get.
Thanks in advance for any help or insight
My truck is a 1996 Powerstroke, totally stock except for a TW Performance 6 position chip (I installed this to make the shift points nicer and I've never had it on anything but "stock" or "+40HP" position) and the big open air filter modification. The truck has a tick over 100K on it, and other than the trans being a little soft for the last 10K miles I've owned it, it's a pretty decent dually.
Over the last six months, it smoked heavily during cold starts, cleared up and ran fine when warm. It got worse and worse starting as the winter temps got colder, so around Christmas I decided that I'd swap to thinner oil to make it easier on my starter, and it smoked more on startup but seemed to run about the same. I stopped driving it as I try to keep the salt off of it over the winter months as much as possible, and I figured I'd put a set of injector orings in it to see if this helped the smokey cold starts. I used Alliant parts as it seemed like these were the best replacements. The old ones were a little hardened, I changed them all out, but didn't help much, and I parked it for about a month as it got cold and I got busy with the holidays. The next time I started it, I let it get warmed up and when I shut it off, it would start and run for about a second, and then shut off, like you turned the key off. If would do this as many times as you restarted it.
I figured maybe it was a bad IPR that was bleeding off too much pressure to fire the injectors when warm, so I rebuilt the IPR. It didn't look terrible (it was interesting that it didn't have a split backup ring on it, but it does now, again I used Alliant repair kit parts) but it didn't change anything and the warm engine shut off continued.
Then I figured I'd bite the bullet and buy a blue tooth adapter and take a look at the electronic data via Forscan. Nothing appears out of range, it never throws any codes, but the problem persists.
Last week I was convinced that maybe I had a bad TS Performance Chip, so I uninstalled it. No change, still shuts off when warmed up, no codes, etc.
If I had to guess, I'd say that maybe I have a bad ECU, but I'm getting tired of throwing parts at it so I figured I'd get some additional eyes and thoughts as I'm pretty used up and in reality there's way more diesel experience and insight on this forum than I have in my mushy brain.
All I know is that the engine starts cold, seems to run ok in the cold start "mechanical" start up mode, but something is killing it when it gets up to temperature. Something that doesn't give me any codes.
Let the input begin. I'm all ears at this point and I've got plenty of humble pie to serve myself for not figuring this out on my own, but I'll take any help I can get.
Thanks in advance for any help or insight
