Ford Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I’m Chris. Welcome and thanks for asking your question!
You need to know where the fuel pump relay is, correct?
You are sure there is no fuel pressure and this is the reason for not starting, correct?
He has fuel pressure. He feels that this is an electrical problem. And, yes, he can not find the fuel pump relay. He has also considered this to be a bad computer, since no codes are coming up.
Do you know what the fuel pressure psi is with the key on?
When attempting to start is there fuel injector pulse and ignition spark, or does he not know how to check these, if so I can help?
Is the check engine light on or off while cranking the engine?
pump runs fine.....somewhere there is a relay thats bad - or the computer has a bad contact - when it runs it's just fine - it just won't stay running - the key turns on the pump runs but when you shut it off it wont engage the fuel pump - he feels the fuel pump relay is bad.....fuel pressure is fine - he feels that it is somewhere before the inertia switch and the battery to the module
the computer, #40 fuse, which he has pulled a dozen times and is fine, or the fuel pump relay....which he can't find....fuel pump relay is what he cant find - was told to the right of the steering column behind the radio - there is a 2 spot hole, but the one is empty and the other is for the turn signal......but he still can't find it....help!
Thanks for the update, since he has narrowed it down to a fuel pump relay concern then we will stay on that. The fuel pump relay is built into the fuse box under the dash called the CJB central junction box. it is not serviceable. If the vehicle will not start and there is no power getting to the inertia switch within the first 3 seconds of the key being turned on then he needs to check all wire coming in to the fuse box that control the relay. If all signals are good then a new fuse box is needed.
See page 6 in the above wire diagram from Ford. If there is good ground to the relay and power from fuse 40 and power from the PCM relay at the time there is no power at the inertia switch and no pressure then the concern is a new fuse box needed.
Glad I could help, if you need anything else, please do not hesitate to ask.
There is a lawsuit being filed that is for 6.0 diesel - however, they are thinking that maybe the 05 f250 5.4 will be included - see where I underlined - do you think this is in any way related? Also, after this problem started, he could see that the box had been fixed from a different recall (on the passenger side toward the door) - it had a black zip tie around it - and he feels that this was NOT factory done.
The 6.0L Power Stroke diesel engine equipped vehicles are plagued with potentially faulty engines. Ford has admitted that it does not know what percentage of the 275,000 vehicles may be affected with the known defects.
Ford is still investigating “engine performance issues” with the same diesel engine model in its 2003 truck line.
The Federal Government reports that this recall will involve the 2005 Ford F-250, F-350, F-450, and F-550 Super Duty Pick-Up Trucks that are equipped with the 5.4 or 6.8 liter gasoline engines.
Ford admitted that it started receiving complaints back in 2004 shortly after the 6.0 diesel engine starting being shipped with the new vehicles.
Ford started an investigation into the stalling problem at that time, and the Federal Government started its own investigation in October 2004.
Ford has reported that their investigation “has demonstrated that the reported stalling incidents in the affected vehicles do not present an unreasonable risk to safety”. Ford has advised the Federal Government that the company plans to make no announcement to the media about the recall.
No I do not think the concern you have and this message are related.