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Repair bad ECU V6 MPI PCM 555

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Repair bad ECU V6 MPI PCM 555

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Old 06-27-2016, 04:01 AM
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Default Repair bad ECU V6 MPI PCM 555
Ecu from my engine is out of order. I still can read memory and fault codes , do diacom tests etc but no ignition. No spark at the plugs . I remplaced ECU from friend's engine, and it fired up right away. Can it be repaired ? Or someone has spare one?

It's a MOTOROLA ECM0402, serial 892204, 09-28-2004
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Old 06-27-2016, 05:02 AM
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Whipple can repair them depending on what's wrong with it. They fixed a broken pin in mine and it works fine now. If I remember right it was $400
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Old 06-27-2016, 06:20 AM
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the ecu needs to be opened up to see whats failed.I have a 555 that I use to rob parts out of.
can you open the ecu up and take some pics?
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Old 06-27-2016, 03:55 PM
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I already mailed dustin @ whipple twice but no response ...
Not being specialist in ECU's Not my best option to open it myself ...
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Old 06-27-2016, 07:52 PM
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+1 Whipple, they fixed my IAC chip
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Old 01-24-2017, 11:40 AM
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He fixed it again
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Old 05-01-2020, 11:00 AM
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Default Pcm 555 opening
Originally Posted by sutphen 30
the ecu needs to be opened up to see whats failed.I have a 555 that I use to rob parts out of.
can you open the ecu up and take some pics?
hello......any chance this thread is still alive?
Can you tell me how to get the pcm-555 case open?
I'm bending it all up.....
Thanks- jim
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Old 05-01-2020, 11:08 AM
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MAN THEY HATE WATER TO.
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Old 05-01-2020, 11:13 AM
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Old 05-01-2020, 11:17 AM
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they hate a big voltage spike as well.

You have little by little pry all around the case to get them to open. What are trying to do ?
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