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I have a 2004 ford f150 5.4 triton. the truck stalled out while driving will not start replaced all the plugs the fuel pressure sensor an fuel pump. yet still no fuel pressure
Re: truck stalled out while driving will not start
Not sure about your truck older Fords have 2 fuel pumps 1 in the tank & 1 under cab drivers side. Anytime you change a pump you must change your filter. also check your fuel line if it has been pinched or has a leak pressure will drop
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Fuel pump driver module . The fuel pump is controlled by the computers . Fuel rail pressure sensor is an input to the PCM - engine computer , the PCM sends message to the fuel pump driver module , the FPDM controls the fuel pump by PWM - pulse width modulation . Ford Electronic Returnless Fuel System Diagnosis Part 1 Ford
Taking your vehicle to a qualified repair shop ,dealer .
Kind of open territory, but check fuel pressure at the rail, check for spark (does tach move when you crank it?)-check the fuel regulator for gas inside the vacuum hose, and make sure things are hooked up like the Mass Air Flow harness, throttle position sensor, even the IAC. Harness to the ECM should be looked at to see if it is plugged in tightly-non-starts can also be found on Fords often be just unplugging and plugging the crank sensor.
Low fuel pressure or clogged catalytic converter. Temporarily remove one of the O2 sensors and take it for a test drive. If the engine accelerates better then the exhaust is plugged (removing the sensor leaves a hole for the exhaust to escape) . Have the fuel pressure tested if it's not a plugged cat.. It could be a weak fuel pump.
AM temp 55 car started but stalled out after starting. Attempted to restart and did not hear fuel pump. Tried again and then fuel pump kicked in. Checking fuel pump inertial switch and fuel pump electrical supply.
make sure to have a fuel pressure test done to it, it must to have a least 35 psi of pressure, also see if car is equiped with map sensor if it does unplug sensor and try to start the car, if start replace map sensor
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