ECU is toast???
Thread Starter
Intermediate
Joined: May 2017
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ECU is toast???
I was driving home and my car turned off on me. Battery is fine but when I looked under th hood and the plug for the MAF sensor was burnt. Does that mean I fried both the wiring harness and the ECU? Engine is a 350 GM goodwrench engine with and L98 intake...
Team Owner
Joined: Sep 2003
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Since your TPI is from an "unknown" donor maybe diagnostics are going to be difficult for starters. There's very likely information on the MAF that could help ID the year TPI used on your engine. That would maybe help determining which diagnostics scheme to use.
Look for an 8 digit GM# on the MAF. If you're familiar at all with the donor mention that. If you've ID'd the relays previously maybe post the information on the relays also and that might help the ID of the TPI donor.
Blown fuse or fusible link would be "first thoughts" for the NO CEL - how the TPI was done on your car needs to be determined. If it was done by a "specialty harness" most of those were done based on the 1227165 ECM - if you know where the ECM is and you can retrieve the label information from the ECM and maybe the PROM it might be able to help you better.
Look for an 8 digit GM# on the MAF. If you're familiar at all with the donor mention that. If you've ID'd the relays previously maybe post the information on the relays also and that might help the ID of the TPI donor.
Blown fuse or fusible link would be "first thoughts" for the NO CEL - how the TPI was done on your car needs to be determined. If it was done by a "specialty harness" most of those were done based on the 1227165 ECM - if you know where the ECM is and you can retrieve the label information from the ECM and maybe the PROM it might be able to help you better.
Last edited by WVZR-1; May 19, 2017 at 07:56 AM.
Team Owner
Joined: Sep 2003
Posts: 25,373
Likes: 2,734
Assuming that the TPI was installed using most of the original wiring. Check your fuses for maybe ECM but not knowing how it was done CHECK ALL FUSES! Even the original H - engine would have used an ECM and had a ECM fuse.
Good Luck!
Barcode on the REMAN isn't much help!!
Good Luck!
Barcode on the REMAN isn't much help!!
Last edited by WVZR-1; May 19, 2017 at 09:56 AM.
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Thread Starter
Intermediate
Joined: May 2017
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What exactly will cause the ECM to get no power? Or what would cause the wiring harness from getting no power? Assuming the fuses are good can the connection to the ECM get fried when the MAF sensor wire burned?
Last edited by CES760; May 19, 2017 at 03:37 PM.
Race Director
Joined: Apr 2002
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From: Anaheim CA
There is a splice (round black cylinder) for the fusible link to the regular wire that goes to the ECM. It's in the lower left part of the picture. The fusible link is the red wire that goes across the bottom of the picture.
Last edited by Cliff Harris; May 21, 2017 at 02:39 AM. Reason: Added more explanatory text.
Thread Starter
Intermediate
Joined: May 2017
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I actually traced some wires behind my ignition switch and found a wire that had a fuse and the fuse was blown. Replaced it and the car fired right up. I think when the MAF sensor plugged burned it burnt the fuse out...