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Re: 87 GMC 1500 runs poor
Posted to Technical Discussion Forum on 5/12/2006 1 Reply

I would like to know what the manifold vacuum is at idle, 2500, and at cruise. I would also like to know what the fuel trims both long termand short term are at the same times. On this vehicle, that will be block learn and integrator. With this data I will hav... Login to read more.

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