I had some trouble with my '00 7.3l Powerstroke on a recent trip from MI to WY. It did this twice on the trip and did the same thing both times. It was also a cold snowy day both times. It would run, but would not build RPMs or spool the turbo up. The first time, top speed was about 30mph. I jumped off the throttle and poked it again and it went after that. The second time, it just kept slowing down no matter what I did to the throttle until it finally just quit moving. It happened to be in 4x4 then, so I put it in 4x2 which allowed the back tires to spin. Once it got them rolling over a bit, it moved it's self into a parking lot. I shut it down, restarted and then all was well after that. It's running fine now after the 1500 mile trip home, but I'm curious what it was and if it will do it again since I'm taking the kids to Florida in it in 3 weeks. Any ideas?

It's been suggested that my intermitant vacuum pump failure might
cause it, but I didn't think the pump ran anything on the motor, only
the HVAC and 4x4. Does this sound like the crank or cam position sensor that I've heard was a problem with these motors? I had a fresh bottle of an anit-gelling additive in it, so I would hope that gelling wasn't my problem.

 

I would wonder about the CPS in early stages of dying as a possibility.

 

yeah the reset upon startup makes me think something electronic. I'd check sensors and connections before going CPS though. Couldn't hurt to poke around and make sure that everything is in order, unless you don't have a garage that is; frostbite can be prety nasty.

 

Exhaust back pressure valve is sticking closed.

 

You sound like you are having similar problems as me. https://www.ford-trucks.com/forums/s...d.php?t=459041. Have you pulled you codes. I hope we both figure it out soon. I will let you know.

 

I'll have it in a friends barn this weekend and start poking around. Thanks for the ideas.... The back pressure valve is for sure something I wouldn't have thought to check.....

Thanks....

 

Nope, haven't pulled any codes yet. I don't have access to a reader and was less than excited about running to the dealer. I probably should go buy one or take it in.

ZX250 - I did see your posts and tried to send you a message to see if you got anywhere, but I'm too new so I dont have rights to send a private message.

 

I haven't had any more problems, I also haven't gotten any more post as to what the problem may be. If you have an autozone near they will pull your codes for free. Don't pay the stealer ship if you don't have to. Just curios if yours is reading the same.

 

kwickordead is ueually right on the money with diesels, at least in the posts I've read. After pulling the codes, which is a good idea anyway, I'd start with his recommendation.

 

if you are looking for a code scanner i would reccommend the auto enginuity. it the best code scanner for our trucks in my opinion.

 

Had the same happen to me and I had a check engine light on. Read the code and it ended up being a Low voltage error across the Oil Pressure sensor on the high pressure side of the oil system. I forget the sensor was called though. I do remember it cost 180$ from the deal though.

 

Classic symptoms of a failing TPS (throttle position switch). Disconnect the plug on your accelerator pedal assy, blow/clean it out, both connectors. Check for burnt contacts (doubtful). Gets pretty gunky around down there sometimes.

$100 will get you a new one.

 

My truck (2001 PSD, bone stock except for 6637 air filter) did the same thing once last winter and once this winter. Problem fixed by shutting off the engine and re-starting it.
I figured that Ford's CPU must have had a bit of Microsoft code running in it ;^) otherwise I would have posted the same question myself!

 

Last week while driving my truck, it did the same thing. It wouldn't build rpm or boost, and would barely drive, and would drive fine if I shut it off and restart. My fix was the IPR (injector pressure regulator). I had replaced my high pressure oil pump, and neglected to make sure the IPR wasn't gunked, (as I pulled the pump off a newer truck). I pulled the IPR and sure enough, gunked up. So, cleaned it and reinstalled, and no more problems. Possible it may be the exhaust backpressure valve like Kwik said as well.

 

SledHauler,

Did you ever figure out what was going on? I am not having any luck with mine. I can't get it to do it again. Run greats now. Can't even get it to throw any codes. Maybe next time!