starts runs a min. if u give it gas it goes dead

Question

Got fuel pump new fuel pres. at 40psi new intake gasket

Answer 1

P0101 MAF (mass airflow )circuit  / range performance problem

P0171 Fuel trim lean bank 1

Look at the 8th vin if the 8th vin is a L the fuel specification are 41- 47 psi, If the 8th vin is a K the fuel specification is 48-55psi.So the fuel pressure is below specification, since we are in a real world being 10 psi will not cause it to stumble it will set a lean bank code. Tap on the MAF (not hard) if it stumbles a MAF is required. Disconnect the fuel pressure regulator plug off the vacuum hose so there is no vacuum leak at the regulator vacuum port, fuel pressure should go up. test the vehicle if it stumbles a MAF is required.