RPM's Going Haywire + Power Loss - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 06-16-2007, 02:11 PM   #1 (permalink)
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RPM's Going Haywire + Power Loss

Hey all,

Long time lurker here (as guest). Wanted to share a problem I'm having and get some opinions. Searched the forums up and down and believe this may be related to the several 'power surge' topics but here I go anyway.

I've got an '05 F-350 6.0, all stock. 26,000+ miles

I recently have been experiencing problems while sitting at stop lights and such where the RPM's start fluctuating between 500 - 1500 (the truck wants to GO when they fluctuate upwards, similar to the other power surge threads I've read). Yesterday this started happening again. When the light turned green, I hit the accelerator and NOTHING happened. I had to idle drive through the light (how embarrassing) and was able to pull over and after a minute or two the problem cleared and I was able to zoom away. It was as if something wasn't telling the engine to fire diesel into the cylinders or something. The worse part is this is an intermittent problem. Drove fine last night.

I've already had it at the dealer once and they cleaned the turbocharger (I was doubtful about that solution and now I know it didn't fix it). I also had them do my 30k maintenance to make sure it wasn't a fuel filter or something.

So I'm bringing it back into the dealer on Monday (assuming I don't stall out). The dealership seems reputable but this seems like looking for a needle in a haystack.

Any suggestions I can give to the mechanic

Thanks,
Mike
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Old 06-16-2007, 02:14 PM   #2 (permalink)
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Re: RPM's Going Haywire + Power Loss

ICP sensor perhaps...mine did the same thing, and thats what they found.
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Old 06-17-2007, 05:01 PM   #3 (permalink)
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Re: RPM's Going Haywire + Power Loss

Thanks! That is what I was thinking based upon what I've read in the forums (and trust me I've read all the way to the end trying to get info).

Mike
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Old 06-17-2007, 08:53 PM   #4 (permalink)
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Re: RPM's Going Haywire + Power Loss

I Concur with the ICP being your problem. Though not as much a problem with 2005 model year engines, the sensors can still fail, and do! I repaired one last Friday for an intermittent surge complaint. I also had a 2003 last week that kept the idle at 950 RPM and did a few other strange things that threw me off.
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Old 06-18-2007, 11:52 PM   #5 (permalink)
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Re: RPM's Going Haywire + Power Loss

Thanks again. I tell ya I love this truck, but getting nervous now. Supposed to be hauling my 5th wheel to Kentucky Lake this Friday for some vacation time (week and a half) with the family and if this happens while I'm hauling I'm in big trouble.

We'll see what the service department comes up with. Of course, it didn't happen today while I was driving it to the dealership. I swear it only happens when its really hot out (wasn't too hot today) but I think people think I'm crazy on that one. lol

Thanks,
Mike
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Old 06-19-2007, 09:59 AM   #6 (permalink)
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Re: RPM's Going Haywire + Power Loss

My ICP just got replaced, same symptoms, should throw a p2285 code. They cleaned the turbo and did a flash. Running better than new now.


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Old 06-19-2007, 11:28 AM   #7 (permalink)
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Re: RPM's Going Haywire + Power Loss

Hmmm, just called the dealer to give them some "back seat mechanic" advise about the ICP and was told it is fixed after replacing the VGT solenoid.

We'll see.

Thanks all
Mike
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Old 06-19-2007, 07:16 PM   #8 (permalink)
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Re: RPM's Going Haywire + Power Loss

Nope not fixed. Stalled out on the way home from work. Let my foot off the throttle because I was going downhill, RPM's started fluctating between 500 - 1500. Dropped to 250 and stalled. Able to start it back up, rough idle at about 500 RPM's, put it in drive and just sat there. Pressed the pedal...nothing...

Finally after about 15 minutes the RPM's climbed to normal and was able to go although it just didn't feel right after that escapade.

I think my vacation is going to go bye-bye

Mike
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Old 06-20-2007, 09:41 AM   #9 (permalink)
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Re: RPM's Going Haywire + Power Loss

KroolDeath

Maybe you should just purchase an ICP sensor and install it yourself to see if it solves your problem.

Yeah, I know, why should you spend your own money to fix your vehicle if it is under warranty. Just a thought.
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Old 06-20-2007, 11:16 AM   #10 (permalink)
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Re: RPM's Going Haywire + Power Loss

Lol, that never occured to me to replace it myself.

Well back at the dealer this morning. These guys have opened up their schedule to get me back in so I really appreciate it so kudos to the dearlership (now if they can just fix it).

I got lucky today, right when I pulled into the dealership it started happening. Ran in there, got a mechanic and showed the problem to him. So he saw it firsthand. Questioned him about the ICP sensor. He acknowledged that could be the source.

Mike
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Old 06-21-2007, 10:01 PM   #11 (permalink)
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Re: RPM's Going Haywire + Power Loss

Well folks, they replaced the ICP sensor. The problem actually started happening while they were examining it, they yanked the ICP and the RPM's settled. Replaced it and all seems fine. Crossing fingers of course as it was intermittent.

However, I'd like to thank everyone for their assistance. Everyone was saying ICP sensor and that it was it appears to be. I also have to give kudo's to the dealer. Now some may say it took them three tries, but damn, it was a needle in a haystack trying to find.

So thanks all!

Mike
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