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06-16-2013, 12:06 AM
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#1 |
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Registered User
Join Date: Jan 2012
Location: Amish Country
Posts: 138
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Ground to pcm makes it run right?
What do I have wrong if my pcm needs a ground wire? Yes, the actual pcm! Once this is grounded all is well and it runs great. I came upon this with a LOT of trial and error!
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72 C10 - Multicolor, 4.8 ls, NV3500. Sold 72 K5 - Under Construction |
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06-16-2013, 03:47 AM
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#2 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: Ground to pcm makes it run right?
Runn a wire?
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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06-16-2013, 04:30 AM
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#3 |
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Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: Ground to pcm makes it run right?
I have heard of similar happenings if you accidentally overload and burn out the internal ground on an Allison TCM by boosting through the TCM's cooling fins by accident. I suppose it is possible the same thing could happen to a PCM, but I have not heard of it before.
As suggested just above me, folks who have accidentally fried their TCM's internal ground are able to get it to work fine by running a ground strap from the TCM's cooling fins to chassis ground. Its kind of a hokey way of doing things, but it'll do until you decide to buy a new PCM... BTW, I have EFI Live and I can download the software on your PCM and transfer it to a new PCM for the cost of a license if you want. It's something like 120 to 130 bucks for a license.
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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06-16-2013, 08:03 AM
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#4 |
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Registered User
Join Date: Jan 2012
Location: Amish Country
Posts: 138
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Re: Ground to pcm makes it run right?
Ok I mean I have a wire on it, it just didn't seem right so I thought I would ask.
Posted via Mobile Device
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72 C10 - Multicolor, 4.8 ls, NV3500. Sold 72 K5 - Under Construction |
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