Already changed the ECM, IAC, throttle position sensor, battery, alternator, crankshaft sensor, MAF, plugs and wires, coil pack, fuel pump and filter, fuel pressure switch, EGR valve, checked for manifold leak with ether, temperature sensor, fuel relay, jump wired the inertia switch to check it, replaced any fuses that were bad, and checked fuel pressure. The new fuel pump runs at about 26 psi, unless I remove the vacuum line from the new pressure regular. Thought may have had bad pump or regulator, so the ones on it now are a second set that I got. First fuel pump was Airtek. Was told they were know for problems. So exchanged it and bought another pressure regulator that was better name brand. With vacuum line off it runs at 32 psi, but still dies after a few minutes. Truck has no tachometer on it, but it's an obd2, so I put my meter on it and set for rpm. It starts high, around 1500-1600. Then drops to around a 1,000 and bob's back and forth to 900 or less, then just drops and dies. The ECM was programmed by the company I got it from. Had to send them my VIN number. All grounds that I see look fine. My problem is that it cranks fine, runs a few minutes and just straight up dies. No codes.I can stand by hood and keep revving it up to keep it running but doesn't idle right and still try's to die. Also tried to straight wire the fuel pump. But it still does the same thing. Would do a load test, but I don't have a tester. So. Do you have a answer that I missed? Thanks
Wednesday, May 13th, 2020 AT 7:08 PM
