1994 Loyale ea82 spfi stumbling. I put a pressure guage in the fuel line to throttle body and am getting 18lbs.psi. It idles fine but pressure does not go higher when throttled up. Dead headed the pump and it shoots to 60 psi. I squeezed the return line from pressure regulator with vise grips to get 23-24 psi and test drove and it runs great. Vacuum to to regulator when checking with a guage at throttle body base is never present. I have 2 extra throtlle bodies and changed the fpr with no difference in symptoms. Could the problem be in the throttle body? Would I be able to re-use the base gasket if I change the throttle body and do they require some sealer?
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Guest Message by DevFuse
Fuel Pressure Regulator
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