G.M. TBI ?

[W Vaughan]

Anyone have a real good wiring diagram for 88-90 G.M. TBI. I'm trying to retrofit into an earlier model car using the factory harness. I know painless makes a harness but I can't afford it. The wiring diagram I have has some things screwed up. I've figured pretty much everything out except the power to the ECM.

Thanks
Will Vaughan

[W Vaughan]

Come on now I know someone here has tried this.

Thanks
Will Vaughan

[DrJ]

V6 or V8?
I have factory manuals on the 88 Astro Van 4.3L V6.

[Paul]

I have a shop manual for the '90 454SS truck,

I can look if that'll help

Paul

[W Vaughan]

It's a 5.7 V8.

Thanks
Will Vaughan

[Paul]

[ QUOTE ]
It's a 5.7 V8.


[/ QUOTE ]

is that like a 7.4?

[W Vaughan]

I think they were about the same. The diagram I have is showing two B3 terminals in the Ecm Conector and that is not right.

Thanks
Will Vaughan

[Paul]

of course now I can't find the stinkin' book but I did find a couple basic Chiltons,

it also appears to show two B3 connections at the Engine Control Module..?

[W Vaughan]

Thats the same diagram I have. It shows two B3 connections, but there is only one. I think one of them is supposed to be a B2. What I'm trying to do is wire the harness to stand alone from the rest of the factory harness. I have all the sensors and the injectors figured out but I need to figure out the power to the ECM.

Thanks
Will Vaughan

[grtpmkn]

Ok i will help I put a TBI in my 41using a stock harness, give me a couple days and i will look and tell you what goes where on the wires, whats your email.?

Matt