Recently my brother in laws ranger suddenly shut offf on him, he said he was driving up hill and was running fine then sputtered quick and shut off. a friend told him it wasd the fuel pump, we replaced the pump and filter and the pump is turning on and fuel is going through the lines but still wont start. If I keep hitting the throttle i can keep it running a little bit and my scan tool reads a lean fuel trim. no dtcs are being set. if trying to start without hitting throttle can hear a lot of air being sucked in through the intake almost seems like too much for idle. any ideas? stuck open egr? bad idle air control motor? bad throttle position sensor? not sure ifs a 3.0 or 4.0 but can find out if needed.

 

vac leak?

 

Start looking for disconnected lines.

 

Mine was having similar issuses check the fuel pump shut off switch mine shorted out. Ford replaced it under warranty

 

youre talking about the inertia switch right? im going to check that tomorrow. as for vacuum leaks and disconnected lines cant find any

 

Yeah the inertia switch

 

checked the inertia switch and all is good also i have power at the fuel pump upon initial key om, i talked to tech at ford and they saidit was probably the IAC motor so we replaced that and no difference. I called my other friend at ford and he said it could be the fuel pump driver module however i cannot find where this is or how to test it nor can I find it in a wiring diagram. any help finding or diagnosing this would be great, wiring diagrams are helpful as well as alternate names. pictures welcome also

thanks

 

Have you checked PSI at the fuel rail? Fuel filter plugged>?

 

didnt check the psi at the rail however filter is brand new and flowing freely

 

check the vac hose elbow under the throttle body...they are very prone to cracking...had to replace mine around 55K

 

Check it anyway, eliminate one thing at a time