1990 Chevrolet Silverado Repair Question
You are using the throttle body injection correct? The regulator in the throttle body will not let the fuel pressure get higher because it is made to run on 15 psi. If you are trying to maintain the computer then you need to get in touch with Jet Electronics and get the computer redone to accept what you have done. I have done this before for a customer with a 383 stroker and it was a learning curve. The older computers do not like the bigger cams makes them over fuel and then the O2 sensor kicks in and leans it and so forth.
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