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| Engineering/Technical Ask technical questions about cars. Do you know how a car engine works? |
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07-26-2007, 05:08 AM
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#1 | |
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AF Newbie
Join Date: Jul 2007
Location: Tamuning
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correct ECU for 92 GM TBI with D1 hot
I purchased a16146299 ECU for a 92 GMC truck/van to replace one that was missing. I don't know what number the original ECU was. When I installed the ECU it didn't activate the fuel pump and the case had positive (12v.) power to it. I read an article on the internet that this ECU and the 1227747 were interchangable however the article stated that terminal D1 was to ground and the diagram (747) showed it to be a black/white wire. My van diagram shows D1 as hot all times and an orange wire. My van has an orange wire on D1. When I checked continuity on 4 other similar ECU's and this one they all showed continuity between D1, D2, and the case. Since D2 is supposed to be ground on my vehicle I conclude that GM made different ECU's possibly with the same numbers that plug into the same harness connection; one having D1 hot and the other D1 ground.
Can anyone confirm this and suggest how to specify the correct ECU having D1 hot (orange wire on harness)? |
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07-31-2007, 08:44 AM
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#2 | |
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AF Regular
 Join Date: Jul 2003
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Re: correct ECU for 92 GM TBI with D1 hot
LOL, oh man I just had this exact same problem. I bought an ECU for my 00 impala. Funny thing is, I got the HDWV number off AllData and it turned out to be the wrong part. There goes $40 down the drain... It plugs in and everything, but I don't get a reading from the fuel guage, and the fuel pump fails to engage.
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