Ford Repair Questions? Ask a Mechanic for Answers ASAP
Hello, Eddie here and I will do my best to help. You can usually hear the fuel pump cycle for a couple of seconds when you turn the key ON, Do you hear the pump run now? and is it starting now or is it in it's no start condition currently? Have you replaced this suspect relay yet? Let us know, Thank you.
Alright, Do you currently have a fuel pressure gauge on the fuel rail now where we can check it? Also, try this, if you cycle the key about 3 or 4 times, does it start easier then?
That's correct, cycling the key to ON, back to OFF again, 3 or 4 times, within a couple of seconds, then you attempt to start it.
So does it start everytime correctly when you do that? What that does is work the fuel pump more before attempting to start. The fuel pump runs about 2-3 seconds when you first turn the key to the ON or START position,
Alright, I follow you, What I can only suggest is getting a fuel pressure gauge on the fuel rail and making sure pressure is 55-65 psi when it does NOT start. If your fuel pressure is 55-65 when it doesn't start, then we know the pump, relay, filter, everything in the fuel delivery system is fine. I don't think your starting problem is anything else other than a fuel issue, but I can't be 100% sure, it could be something else. So we want to see if the pressure goes up to 55-65 psi everytime you turn the key on. It should. If it doesn't come up to 55-65 and doesn't start, then we have correlated low fuel pressure with the starting issue.It could be some crud in the lines, it could be the inertia switch, or the PCM itself as the PCM grounds the fuel pump relay. But until you can get a fuel pressure gauge on it and it's in it's "broken state" it will be impossible to know with absolutely certainty what is at fault. But I believe it is going to be one of the things I've mentioned. Let me know if you have any further questions. Thank you.
The PCM is called the Powertrain Control Module. Hopefully you want need that though. Seafoam should have helped. but depending on how bad it was maybe some still in the lines possibly, but, overtime if you treat it once a month or so, it would clean the lines and injectors out overtime. I would keep cycling if it seems to help. Also, when you first turn the key on, get in a habit of listening for the fuel pump, You should hear a fight buzz from the back for 2-3 seconds then it quits, that is the fuel pump cycling, try to correlate a no start with not hearing that pump cycle. If it won't start also you could try spraying some starting fluid directly into the air intake. If it fires up then and that helps. That would also point to a fuel delivery problem.