sometimes my fuel pump does not connect when I rotate the key. When it does the starts fine and also never stalls or runs rough. There room no trouble codes. I have already checked the relay. What could be causing it to occupational sporadically.

I need to know what engine dimension you have in van to look end the appropriate wiring diagram so i can shot to assist with what might be going on.


Ok next time the won"t start I would like you to inspect the inertia switch. That is ~ above the ideal side (passenger) under the dash, check out pic below. Once you find it simply push the white or red button on it and also see if it starts. Otherwise ns would have to say we need to check the wiring come the pump or check for power to and also from the relay through a digital multi meter. Allow me recognize what girlfriend find and we will certainly take it from there.

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I have checked the Inertia switch, the is fine. I have learned something that might help you. I can keep turning the an essential from the turn off to run till I hear the pump run, climate it starts. Occasionally it takes number of times, but once ns hear it run it starts right up.

have you watched the PCM strength relay? This is the switched power source for the fuel pump relay. This is in the junction crate under the dash. If you have actually a digital multi meter then inspect if term 86 or the white wire through the light blue strip is gaining power together you turn the vital on.
now the pump will certainly not connect at all. I will test the wire you told me around tomorrow. Is the AC or DC?
I confirm the relay, it is getting power. I have the right to feel it clicking when the engine is turned over. I will check the wire going come the fuel pump. Will it be the white wire through the blue stripe? where in line would be the best place to accessibility it? give thanks to you for her patience, i will include some an ext money come the forum for you.
It shows the wire to be pink v black stripe the powers the fuel pump. Permit me recognize what girlfriend find and we will certainly go native there.
The Fuel pump is certainly getting power. Mine meter reads the pink through black stripped wire as gaining power and also I deserve to hear that click once the key is turned yet it does no run.
yes so when it won"t start does the pump obtain power? have you changed anything? have you confirm for spark?
I have actually a 2002 ford expedition, 4.6 v8, pulling up in my driveway and the van went dead. Castle told me it was the fuel. Therefore I changed the fuel pump and the filter, yet it keep blowing the fuse under the hood
as soon as I try to start my exploration it will certainly crank but it won't start. Ns have figured out that that is a fuel problem since there isn't any type of fuel in ~ the rail. I have replaced the fuel filter, fuel pump, fuel pump driver module, crank place sensor, and both electronic came position sensors. I have likewise pulled the central junction box and checked the built in fuel pump relay to view if it to be bad and it wasn't. What else should I it is in doing to obtain fuel come the engine
The an initial thing you should be act is using a fuel push gauge to understand for sure what the pump is or isn't doing. Inspect the Inertia switch to see if it has actually been tripped.
I checked the inertia switch and it wasn't tripped. I also checked to watch if ns was getting any voltage come the inertia switch and I to be not. As much as the fuel pressure, as soon as I traction the key fuel line off of the rail and also cycled the pump number of times, there to be not any fuel coming v the a in line. The only reason ns pulled the key line is because I can't it seems to be ~ to be able to find the Schrader valve anywhere on the fuel rail.
i don't know exactly how you deserve to know an internal relay is good or not. You're simply going to need to track that down through the wiring diagram.
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I have the diagrams and also I tried bypassing the fuel relay to watch if that worked and it didn't. This is what leader me to think it is miscellaneous else.
That simply makes no feeling at all. You say you have actually no strength at the Inertia switch and also that comes directly from the relay and you speak you jumped that the end which would have actually put power directly to the Inertia switch. You're act something not correct here. The fuel pump relay is not even accessible.
This is what I offered as a guideline. I understand that the fuel relay is not obtainable that is why ns tried to run the wires the come from the relay.
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