Pcm problem?
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Joined: Oct 2006
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Pcm problem?
Every once and a while my truck will lose power after I have been driving around for a while. The power level is similar to stock when the truck is tuned. The truck still builds boost presure, and everything seems and sounds normal, also no DTC's. When I shut the truck down and restart it the problem goes away? I dont think this is a tuning problem because this issue happens on every custom tune I have, even stock. What could this be?
Postmaster
Joined: Sep 2005
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From: Florence,SC
i would set it back to stock long enough to drive it for a while to make sure its not the tuner. i see its a 03 in your gallery. these are sensitive trucks exspecially when they are tuned with out of date tuners. see if there is a update for your tuner.
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Joined: Jul 2004
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From: Ohio
Welcome to FTE Heat
Read First: https://www.ford-trucks.com/guidelines.html
When did you take the truck in for the last reflash and what tuner are you using?
Read First: https://www.ford-trucks.com/guidelines.html
When did you take the truck in for the last reflash and what tuner are you using?
Postmaster
Joined: Feb 2006
Posts: 3,201
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From: waynesville, mo.
I have run into this once before. It was on an older 7.3. Driveability problems would go away after shutdown then restart. It was actually an incomplete program in the pcm. Almost like the pcm only took a portion of a flash. Have your dealer reprogram the pcm using "as built" data. If this doesnt fix the trouble, pcm replacement might be in the works. Now remember, this is comparing my incident with yours, complete diagnostics are necessary.
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I have the most recent reflash- ebp turned off and the injector cycle after shut down. I run sct with great result for over 40,000 mi. When I had the truck reflashed for the ebp recall the problems started, but my sct also got damaged around the same time. after reading vloney's post it makes my wonder about the condition of my sct, the cord was nearly pulled out.
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I pulled the stock flash with the sct and replaced it with race tunes. So if my sct is damaged I just screwed up my stock calibration, not being able to reload it correctly. could this sound right? Also is ford able to reflash the pcm completly with the same flash?
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From: waynesville, mo.
I'm not a proponent of tuners. With the invasiveness of the tuners, any trouble with them, especially when hooked up, greatly increases the chances of driveability issues. To repair this one, you have to go back to square one (initial programming)
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Joined: Jul 2004
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From: Ohio
Heat I don't know what you are talking about with the cord but here it goes. Your engine has a strategy, If you received the latest flash, you have to contact whoever you bought your tuner from to correctly match the new calibrations.
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I know that! I just think my sct's cord is not connected to the tuner because it was pulled on very hard and some of the cable are no longer connected. So my pcm problem might be due to improper program loading. My programs are the correct program for my strategy. I appreciate everyone responce on this.