1999 Ford F-150 Repair Question
Why engine does not fire?
did youcheck for fuel pressure??
Yes.There is little or no fuel pressure but there is no fire going to the fuel pump>>>There is just no fire. I have disconnected clean/sprayed the main harness on the firewall with no positive results.
when you turn the key on, it will activate the pump for only 2 seconds. after that, it will turn on when the motor starts.
check the interia switch behind the right lower kick panel especially if had it towed.
Thanks>>>Have not been towed>>>But would the fuel pump being inoperable prevent getting fire at the coil and spark wires?
which motor do you have??
did you crank it long enough with a good ground on the plug to check it.??
The vehicle has a 4.6 engine and yes to the length of cranks.
it is rare for a no spark condition on the 4.6/5.4 series.
i would verify fuel pressure first with a gauge.
But there is NO spark, so what else? Could it be the cam sensor?
yes, it could but it would throw a code if it was. is there any codes?? if not, i am still going to refer back to fuel pressure as it is the first check in a diag after compression test.
Nothing is showing up on the codemachine. However I did put a live wire from a battery directly to the fuel pump wire leading to the fuel pump and did not hear the pump engage. If the pump is working would that generate fire/spark?
But my unlining question is why isnt there's fire from the coil and leading into the coil? Even if there is fuel would the vehicle start w/o spark? I am very thankful in your help>>>>Semper FI