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04-18-2020, 11:04 AM | #1 |
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1987 tbi
Hey guys, I bought an '87 r10 without the drivetrain. I have a complete '95 tbi that I got with a bunch of other parts last year, and I want to put it in the '87. I've done a couple of searches, and I think the engines are virtually the same, but I'm wondering what I'm going to run into as far as the ecm and wiring. Since this truck doesn't have a motor, I don't have anything to go by, and it looks like part of the harness was cut... Any help would be greatly appreciated!
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04-18-2020, 11:59 AM | #2 |
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Re: 1987 tbi
Everything should transfer over as both were TBI. Don't know of any major differences
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04-18-2020, 06:50 PM | #3 |
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Re: 1987 tbi
That's what I thought, based on my search. So I guess I should look for a harness for a '95? Would they be the same?
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04-19-2020, 10:30 AM | #4 |
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Re: 1987 tbi
Can someone tell me for sure what years wiring harness will work? I think there are going to be some differences in the transmission part.
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05-06-2020, 06:22 PM | #5 |
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Re: 1987 tbi
Are you using the 4L60E tranny from the 95? If you are, you would do best to use the wiring harness and ECM from a 95. In the 95, the ECM controlled the tranny. The 4L60E in 95 has slightly different wiring than even the 93 or 94 (can't remember what year the extra wire appeared). I think there was one more wire in the 95 tranny harness.
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Bob 1967 2wd Burb, 350/TH350, 3.73 posi |
05-08-2020, 04:52 PM | #6 | |
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Re: 1987 tbi
Quote:
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05-08-2020, 11:50 PM | #7 |
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Re: 1987 tbi
I believe the 89 used the #1227747 ECM.
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Bob 1967 2wd Burb, 350/TH350, 3.73 posi |
04-19-2020, 09:15 PM | #8 |
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Re: 1987 tbi
I think you will have to do some pin out adjustments. On the 88+ trucks they changed up the wiring some a couple of times. I know the EGR changed and I think it was mostly emissions equipment. I know that they used a couple different ECMs. The 87 may have been a big cap distributer. I would get the wiring diagrams and go from there. The swap itself is straight forward.
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04-20-2020, 08:11 AM | #9 | |
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Re: 1987 tbi
Quote:
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04-20-2020, 01:59 PM | #10 |
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Re: 1987 tbi
I am sure there are a few wiring diagrams on the web but if not the factory service manual is excellent but even a Haynes manual should work.
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04-23-2020, 08:20 PM | #11 |
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Re: 1987 tbi
I was looking to do the same thing a few years back and found that the 95 used a few different plugs. If I recall, things like the TPS and maybe others as well. Not a big deal, though.
I have a 1988 GMC and a 1995 Chev wiring diagrams. PM your email and I can send them to you,
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Bob 1967 2wd Burb, 350/TH350, 3.73 posi |
04-24-2020, 05:09 PM | #12 |
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Re: 1987 tbi
PM sent, thanks for the help
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05-06-2020, 02:25 PM | #13 |
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Re: 1987 tbi
The engine I'm installing didn't have the idler pulley, so i bought one for it, but I still need the spacer and bolt. Anybody have a source, I can't find one on the web. Junkyard my best bet?
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