It has the 4.6 litre engine. It starts and runs fine for 30 seconds to 1 minute later suddenly loses fuel pressure, sputters and dies. I've hot wired the pump from the battery and it runs fine and continuous so its not the pump. For some reason it loses power to the pump through it's common circuit. I changed out the CCRM, containing the pump relay, with a new one next to no joy.
Also changed the crank position sensor and IAC. Does this sound approaching a faulty PCM? What tells the PCM to start or close the pump relay?
Scanner shows no codes and it passes KOEO and KOER tests beside no faults.
Live data shows Fuel Sys 1 first next to closed loop, then open loop, later closed loop continuously.
I've google the heck out of this problem with no results, so this is my last hope beforehand going to the dealer.
check your throttle positioning sensor t.p.s
Answers: is their any way, you can find the fuel pump flex to the ecm controller? if you could find the correct port, perhaps you could put a voltage meter on it, and see if the power drops out from the ecm.
check your throttle positioning sensor t.p.s
enjoy some one start the vehicle while you test the voltage at the pump. when the car stalls compare the voltage. trace wires forward until you find the problem. it could be a discouraging connection or a broken wire somewhere or a impossible ground. if you are not comfortable doing electrical work then it may be best to take to a shop... hope this help and good luck with it how about the fuel filter.
enjoy some one start the vehicle while you test the voltage at the pump. when the car stalls compare the voltage. trace wires forward until you find the problem. it could be a discouraging connection or a broken wire somewhere or a impossible ground. if you are not comfortable doing electrical work then it may be best to take to a shop... hope this help and good luck with it
Also changed the crank position sensor and IAC. Does this sound approaching a faulty PCM? What tells the PCM to start or close the pump relay?
Scanner shows no codes and it passes KOEO and KOER tests beside no faults.
Live data shows Fuel Sys 1 first next to closed loop, then open loop, later closed loop continuously.
I've google the heck out of this problem with no results, so this is my last hope beforehand going to the dealer.
Can anyone detail me how difficult a...
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check your throttle positioning sensor t.p.s
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Answers: is their any way, you can find the fuel pump flex to the ecm controller? if you could find the correct port, perhaps you could put a voltage meter on it, and see if the power drops out from the ecm.
check your throttle positioning sensor t.p.s
My vehicle is overheating, why?
enjoy some one start the vehicle while you test the voltage at the pump. when the car stalls compare the voltage. trace wires forward until you find the problem. it could be a discouraging connection or a broken wire somewhere or a impossible ground. if you are not comfortable doing electrical work then it may be best to take to a shop... hope this help and good luck with it how about the fuel filter.
enjoy some one start the vehicle while you test the voltage at the pump. when the car stalls compare the voltage. trace wires forward until you find the problem. it could be a discouraging connection or a broken wire somewhere or a impossible ground. if you are not comfortable doing electrical work then it may be best to take to a shop... hope this help and good luck with it
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