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TT SWAP:CEL ON, NO POWER ECU, unable to dattalog

570 views 5 replies 2 participants last post by  stefo 
#1 ·
Hi
I have recently done a swap on my SL stealth with a twin turbo engine 92.
All has been swap: engine and all the harness around the car.

All was fine, except idle rough at cold start.

Yesterday I have worked on the TPS with my MMCD datalogger just to be sure to adjust it at the correct value.
I have tried to start the car for test and the MFI have intermittent cut enable to stay at the right RPM value because of the intermittent MFI cut and the car stal.
Now, it wont start at all, CEL is ON, dattaloger have: ECU Comm Error/No signal.it s like the ecu have no power or is enable to boot.
I have checked the fuse 20Amp under the hood and 12Amp in the fuse box they seems good.(i ll rechecked them with multimeter today).
Pin 62 ecu have power but not 12 and 25.
i have tested the Mfi as the manuel describe and it seems ok.power at the B and Red wire
i have already changed my starter relay from my SL but it s not that.
Pump doesn t start by fuel pump check connector.

i suppose that i have a short somewhere, harness had already given me a lot of troubles.

Hope ecu is not fry.

please could you help me to find the best direction where and what to search.
thanks.
 
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#6 ·
thanks for your answer :)
i have already checked the ecu and it seems OK: no leak
But i know that it can be bad without leaking visual.
Unfortunatly i don t know someone with a 1G turbo.
I ll do an another check on my side and certainly send the ecu for repair.

thks Stef.
 
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