Stalling issues--how meny bad CPS can one get? - Ford Powerstroke Diesel Forum
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Old 06-19-2009, 09:06 AM
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Stalling issues--how meny bad CPS can one get?

Sorry if this gets a little long winded, but I just want to lay out all the details for the rest of you, and hope for some input...

Installed the DP Tuner about a year ago... maybe a little less, and the truck ran great with it untill about Feburary. Prior to the DP, the factory CPS recall was done. Feburary, start getting an interminant 'hic-up', and once in a while, a stall. (Around the same time, the tork converter goes out, and is replaced by the same guy that built the trans about 25K ago, he did a complete check of the trans said it looked like he put it together yesterday) I replaced the CPS with an AutoZone unit around March/April, same symtoms. About 2 months goes by, replace it with one from Advance, same symtoms within 10 miles driving.

Doesn't seem to matter if it's wet or dry, day or night, wipers on or off, head lights on or off, absolutly no ryme or reason to when this issue comes up. It will hic-up a few times, some times sets the SES light, some times not. I've had the codes read and cleared mulitple times. I get these codes:
-Air intake heater (been removed for boost fitting, no worries)
-Exhaust back pressure (decell tune on DP Tuner likely the cause of this one)
-Upper and/or Lower Alt interminant fault (both have been replaced, could this be an indicator of something related to my problem?)
-CPS interminant

I have no idea... might run great for a few days or even weeks. Might happen every few minutes up to 10 times a day. I can't imagine getting that meny instantly bad CPS... could there be any relation to the DP Tuner? I have talked to Jody when this first started happening, and he offered to re-burn the chip with some newer, updated tunes. I have not done this yet, mostly because I don't look forward to driving my truck for a week or 2 with out the DP Tuner! I have tried all settings and get the same problem, stock, tow and econo, I've run each one untill I get a hic-up... My next step is to remove the tuner to have it re-burned, but... I'd hate to think that something as awesome as my DP is causing this problem.

Does anyone have any idea? Could the interminant alternator faults be causing something? Every time I have the codes read (by a quality scanner at my buddies' garage) they have been cleared. I'll try to stop in today and write down the actual code numbers.

Esteemed powerstroke gurus, please help... I love my truck, but this stalling/hic-up issue is driving me nuts. I think the surge/instant on/off is what killed my tork converter. That kind of jolt on the whole drive train isn't good....
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Old 06-19-2009, 09:24 AM
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Maybe pull the chip for a few days and see if it occurs. I know driving without tunes sucks but it's worth a shot.
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Old 06-19-2009, 10:55 AM
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Yup, I'm gonna pull the chip, and while it's out, send it to Jody for the re-burn he offered. Just haven't done it yet... I'm bad about procrastinateing... but it's almost got me driven nuts enough to do it really soon...
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Old 06-19-2009, 12:35 PM
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This may sound silly, but check your main ground wire, and I mean CHECK IT. There have been times that a wire will fray enough or have the sleeve rubbed off enough to cause this kind of symptom. Check the connections, check the continuity, check the wire itself physically, ect.
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Old 06-22-2009, 09:43 AM
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Quote:
Originally Posted by Sleeperstroke View Post
This may sound silly, but check your main ground wire, and I mean CHECK IT. There have been times that a wire will fray enough or have the sleeve rubbed off enough to cause this kind of symptom. Check the connections, check the continuity, check the wire itself physically, ect.
Are you refering to the grounds on the batteries, or at the motor block, or???
Obviosly checking all of them would be a good idea, but the ones at the batteries should be good, I've replaced the batteries, around the time of the lower alt... I guess I forgot to add that to the time line, I think it was last fall some time, after the chip, but months before the problem started. Anti-oxident paste was used on the connections... but I'll check them all...
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