Project Dumpy - '88 chassis cab dump truck (2 Viewers)

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OK, so after driving 30+ min and sufficiently warm I looked at the fuel trim - I got 5V
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which according to the pages posted (thanks!) seem to indicate the ECU is seen a long term lean condition and is enriching the fuel mixture to the highest step.

also, while idling, I am able to pull and hold a vacuum on the E port - which is supposed to just go through to the throttle plate - I think I may have gotten it clogged when I installed the throttle body - I may have to go back and check to see where it is plugged up.

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