Need a good ECM plug wiring diagram

[larry33kc]

I need to verify that my wires are pinned correctly to my injectors.

I took out the BigStuff3 setup that was in my car for a stock style system with a SD chip and PowerLogger setup and everything it working (fuel & spark) but won't start. Eric at TT thought the BS3 changed some pins around

I am having problem finding a good diagram for the pin out to verify.

 

[ScottHeidinger]

http://www.vortexbuicks-etc.com/ecmwiring.htm


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[TurboBob]

cam sensor alignment?

 

[TurboBob]

cranking fuel is batch fire, the ECM doesn't switch to sequential until after the engine starts, so which injector is wired to which output doesn't matter

 

[larry33kc]

Ok. So what am I looking for. The car ran with the BS3. All I did was unplugged the ECM cables from the harness and plugged them into the factory ECM, and no start

 

[RmvBfrFlght]

At key-on, engine-off does the SES/CEL do a quick blink off then stay on solid? This would verify that the ECM is getting power and is actually running from the PROM.

RemoveBeforeFlight

 

[ScottHeidinger]

https://www.turbobuick.com/threads/...stuff-3-back-to-stock-ecm-now-no-fire.414303/


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[michael evans]

Here is an good one.......

 

[larry33kc]

Ok I found the wire, it is run to a NEG post on the passenger fender.
Where is the other end of this wire so I can reconnect it. I don't see it.

 

[larry33kc]

Never mind. I found it. It's way up under the harness conduit, they cut it so short I'm not sure how I can fix it.

 

[ScottHeidinger]

You should be able to just run a new wire spliced in close to the computer. Sucks that they cut your engine harness.



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[larry33kc]

I fixed it and it started right up. Now I find out someone took out the ESC module so it's throwing a code for it and the EGR I don't have.
Been all over today looking for the ESC but no luck. That's why my SES light was stuffed behind the dash I guess, it is always on.
Anyone have any ideas on how to use the SES light without a EGR?

 

[ScottHeidinger]

Eric's chips don't need the EGR but the ESC is what reads the knock sensor?


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[ScottHeidinger]

Turbo Tweek chip


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[larry33kc]

Yes I have a SD chip installed but I have a SD2 that I will put in when the gremlins are fixed.
I was putting everything in there place and now after I mounted the Scanmaster gauge it decided not to read data anymore.
This car is driving me crazy.