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PCM stops working... works when re-connected

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Old May 2, 2008 | 12:36 AM
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Default PCM stops working... works when re-connected

I keep getting a problem that requires me to re-connect the PCM in order to get it working again, has anyone ever heard of this/know a way to fix it?

thanks ,Andrew
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Old May 2, 2008 | 06:55 AM
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Originally Posted by nofxrxmxpx
I keep getting a problem that requires me to re-connect the PCM in order to get it working again, has anyone ever heard of this/know a way to fix it?

thanks ,Andrew
Can you give some more details, like decribe the problem that goes away when you RnR the PCM?
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Old May 2, 2008 | 09:36 AM
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well i go to start it, and there is no signal to the pumps, no spark, and if i try and hook up a logger it acts like the PCM is off. I re-connect, and it is very hard to start, but once started it runs fine... 2-3 more starts down the road and it does the same thing again
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Old May 2, 2008 | 03:34 PM
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The car is throwing a P1683 which equals check/reprogram/replace the PCM

The car has gotten worse, as the fuel pumps are loosing voltage while driving and the car has to be throttled over 1k rpm to keep the car from stalling.

I plan to replace the PCM but I want to know what would cause this, is it a problem inside the PCM caused by a bad board part, or is it because a wiring issue in the car fried the PCM. This is what I need to know before putting another PCM in the car.

I have read that long term water damage inside the PCM could cause this code. I dont have the tools to take the PCM case off so I can't check.
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Old May 3, 2008 | 04:56 PM
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the only tool you need is a 7mm socket and 1/4" ratchet
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Old May 4, 2008 | 05:43 AM
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nof - There are many reasons a PCM can go bad, but, without knowing any more about your situation, I would suspect old age as the culprit. Unless you're aware of some details you haven't shared, I'd say replace the PCM and call it a day.
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Old May 11, 2008 | 04:40 PM
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i cracked open the PCM...and it looks old. and looks to may have some water damage, i have a new PCM here with my VIN and tune flashed onto it, we'll see next weekend if it solves the problem.
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Old May 12, 2008 | 11:39 AM
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We have lots in stock if you need one.
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Old May 13, 2008 | 01:50 PM
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lol... i ordered one from you last week... remember, i am Andrew from v8rx7forum


Thanks for the GREAT deal, and helpful service, +1 for wait4me performance
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