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Old 03-23-2017, 01:40 PM   #14
ChevyTech
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Join Date: May 2004
Location: Minnesota
Posts: 4,620
Re: 350 TBI Swap Hiccup :/

I doubt the ECM is bad. They don't fail very often.

If power is not getting to the injectors, then power may not be getting to all the power circuits to the ECM. There are multiple power circuits that supply the ECM.

Here is a link to a ECM connector pin out chart that should be correct for the 1990 system you have.

http://www.wedgeparts.com/images/747ecm1.jpg
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Did you give the model, year, engine, fuel system type, and transmission information?
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