I have three injected vehicles, a Buick, a Fiero and a GMC van. Wishing to learn more about the systems. Only the GMC is a TBI engine. The other two are V6s with port injection. The van is my main interest right now. It eats gas like there wasn't going to be any more. It does need a good basic tune before anything else. It is a '93 that had a 4L60E transmission and now has a 700R4. That has created some issues with the TCC. It has a 16168625 ECM.
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