Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
It is a TBI. When I give it full throttle, you can watch the injector stream diminish as the the throttle plate opens. It will run and idle fine, and rev up with very little throttle, but if full open, it boggs out. I can manually add fuel ( with a spray bottle ) and it will rev up some more. It seems like it's starving for gas.
check the fuel presure..this must have no less the 9psi at all times...the pump may be bad even if it is new...also make sure you install a new fuel filter,it may be clogged
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NOTE: A fuel system pressure test is part of several of the Diagnostic Charts and Symptom Checks. To perform this test, follow this procedure:FUEL PRESSURE TEST