01 PSD acting funny
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01 PSD acting funny
After driving my truck for at least a half hour it the idle goes to about 900 rpms and back down to 600 rpms which is what it normally idles at. When it starts doing this the truck starts shaking kinda like a 5.6K mod idle. If I put it in nutral it smoothes out. Now once you start driving it feels like the throttle isn't consistant. If you press it down a certain amount one time than you press it down again it may not be the same. It's an 01 with Tymar, Jody's 80hp tune and BTM. Personally I think it may have something to do with the PCM but what do you guys think? Thanks, Damon
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Ok now it's gotton worse. What it's doing is when decelerating the injectors are kicking on but not all of them or on and off. I don't know for sure. I do know when I got the PCM from Jody I noticed when decelerating the injectors didn't kick right on like they did with the stock PCM. They always made a noise like they were going on and off then they would stay on. I don't know if my description is right because I don't know for sure if the pcm can turn injectors on and off. What I do know for sure is that if you are decelerating you don't hear injector noise until you hit the throttle or reach 30 mph. I'm gonna call Jody today to see what he thinks. By the way the truck just turned 67000 miles. I think it has the original CPS.
Last edited by No2Oil; Oct 10, 2005 at 05:21 AM.
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From: Darrington, WA
Have you checked the wire bundle for the injectors under the valve covers. The plug backs off making the engine run rough. Ford has a replacement plug and it's an expensive bill if the stealer R&R's it. Good luck
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From: Cabot, Arkansas
Originally Posted by No2Oil
Ok now it's gotton worse. What it's doing is when decelerating the injectors are kicking on but not all of them or on and off. I don't know for sure. I do know when I got the PCM from Jody I noticed when decelerating the injectors didn't kick right on like they did with the stock PCM. They always made a noise like they were going on and off then they would stay on. I don't know if my description is right because I don't know for sure if the pcm can turn injectors on and off. What I do know for sure is that if you are decelerating you don't hear injector noise until you hit the throttle or reach 30 mph. I'm gonna call Jody today to see what he thinks. By the way the truck just turned 67000 miles. I think it has the original CPS.
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From: Saratoga Springs, UT
So what ended up being the problem here. This sounds like exactly what my Excursion does. When I let off the accelerator while coming over a hill to a decline, my Excursion just starts to idol really rough and I have no power at all until I shut the engine off and restart it, then it's fine again. It's going to the dealership today, so any input would be helpful.
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Post Fiend
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Take that truck to Autozone or another store that pulls codes for free as a start, just to see, at no cost. Then take it from there. That's what I would do before opening my wallet. Then I might look at my tranny situation if all checks out.
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From: Saratoga Springs, UT
Originally Posted by Tenn01PSD350
Take that truck to Autozone or another store that pulls codes for free as a start, just to see, at no cost. Then take it from there. That's what I would do before opening my wallet. Then I might look at my tranny situation if all checks out.
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From: Saratoga Springs, UT
I forgot to mention also that I took it to a tranny shop and had them service it and they said that it didn't sound like a tranny problem, then they serviced it and said everything looked great, so he didn't think it was related. I have 129k miles on it.
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From: Saratoga Springs, UT
For those interested. I took my Excursion in today and they called me this afternoon and said they were able to get it to duplicate the problem. The code reader said cylinder 4 misfire, but what's happening is the whole side is shutting down, so they think there may be a short or something in it. They didn't give me any more details than that and they said hopefully they can pinpoint it tomorrow morning, so we'll see what happens.
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Excursion Bucking
My O4 started bucking at highway speeds and surges of air is heard in the engine compartment. Took it at the Dealer Friday and they wound up replacing the $1000 turbo assembly. (under warranty of course) They keep the turbos in stock because it is a common problem with the 04' power strokes and older. 
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From: Saratoga Springs, UT
Originally Posted by woody_f250
For those interested. I took my Excursion in today and they called me this afternoon and said they were able to get it to duplicate the problem. The code reader said cylinder 4 misfire, but what's happening is the whole side is shutting down, so they think there may be a short or something in it. They didn't give me any more details than that and they said hopefully they can pinpoint it tomorrow morning, so we'll see what happens.
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