I have been on several fourms trying to find the answer to my problem with no luck thus far.. I was just refered to this site by somone on another.
So this is what I have, and what I have done as far as diagnostics.
98 F150, 185k miles, 4.2L, 4x4 (broken but there), XL trim
15 minutes after driving over a large curb (decent amount of shock through the vehicle), while running the engine under normal conditions 1800rpm? ~30mph i experienced a total, and instantanious power loss. It was so fast I assume it was ignition related. Everything in the cab of the vehicle seems normal, gauge cluster, radio, heater fan yada yada yada.. (by power loss i ONLY mean drivetrain)
NO Check Engine light, Engine Turns over just fine, No Spark, No Power to the Fuel Pump
Fuel Pump rollover switch is NOT tripped, I checked the button, and then also wired around it with a paper clip just to check. Now its put back togeather.
I have switched all 3 of the under-hood relays around with absolutely no change in the symptoms when i turn the engine over. (turns over effortlessly, does not kick at all, even with starting fluid)
I have installed a new fuel pump, and then put the old one back in after realizing that was not the problem (I did this first, which was certianly dumb..)
I have checked EVERY Fuse in the vehicle (maybe 4 fuse boxes total?) There all good...
I have tried jumping it with another vehicle, as well as ensuring good connections to the battery.
When I turn the ignition from off to on (NOT Start..), The check engine light does NOT come on momentarily like it used to, and should.
So thats all I can think of that would be relevant, If anyone has any other ideas for me before getting this thing towed to a shop I would REALLY appreciate it. I'm a well past broke college kid..
Thank you for taking the time to read this!
Rob
So this is what I have, and what I have done as far as diagnostics.
98 F150, 185k miles, 4.2L, 4x4 (broken but there), XL trim
15 minutes after driving over a large curb (decent amount of shock through the vehicle), while running the engine under normal conditions 1800rpm? ~30mph i experienced a total, and instantanious power loss. It was so fast I assume it was ignition related. Everything in the cab of the vehicle seems normal, gauge cluster, radio, heater fan yada yada yada.. (by power loss i ONLY mean drivetrain)
NO Check Engine light, Engine Turns over just fine, No Spark, No Power to the Fuel Pump
Fuel Pump rollover switch is NOT tripped, I checked the button, and then also wired around it with a paper clip just to check. Now its put back togeather.
I have switched all 3 of the under-hood relays around with absolutely no change in the symptoms when i turn the engine over. (turns over effortlessly, does not kick at all, even with starting fluid)
I have installed a new fuel pump, and then put the old one back in after realizing that was not the problem (I did this first, which was certianly dumb..)
I have checked EVERY Fuse in the vehicle (maybe 4 fuse boxes total?) There all good...
I have tried jumping it with another vehicle, as well as ensuring good connections to the battery.
When I turn the ignition from off to on (NOT Start..), The check engine light does NOT come on momentarily like it used to, and should.
So thats all I can think of that would be relevant, If anyone has any other ideas for me before getting this thing towed to a shop I would REALLY appreciate it. I'm a well past broke college kid..
Thank you for taking the time to read this!
Rob
Jan 22, 2008 at 10:09 PM