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Posted on Jan 02, 2017
That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.
Posted on Jul 17, 2009
SOURCE: 2005 Ford F250 Diesal Pickup,
The primary pump is defective, it has a check valve that is bad so replace the pump it costs $0.00 compared tothe pressure pump thats $900.00 and it will be damaged if let run dry.
Posted on Sep 02, 2009
There should be enough pressure to squirt fuel if you have a test point. The injector will not spray untill it sees a pulse from the ignition module. You might have someone turn the ignition switch on while you listen at the tank, the pump should run for two seconds. If not I would start with the relay, maybe swap it with the a/c relay, should be same part #. if the pump does not run, sometimes a sharp rap to the bottom of the tank will dislodge a stuck pump(only temp. Not a solution)but will let you know if the pump is the problem. If the pump runs and you have pressure but still have no spray at the injector then you need to look at ignition module, crank sensor. Depending on if you have fire at the plugs. If you have no fire, the crank sensor is suspect. If there is fire check the ignition module. If you take the ignition module to an auto parts store(i.e. Advance, O'reilly ) they have a tester to tell you if it's bad. Hope this helps you find your problem.
Posted on Nov 17, 2009
From your description it sounds like your ECU is believing you are at Wide Open Throttle (WOT) when conditions are to the contrary.
MAP sensor is a good place to start, but their failure rate is seldom, Id be more apt to look at the Throttle Position Sensor (TPS), and while you are at it take a look at the throttle stop and AIS motor/sensor too.
When you open and close the throttle from the throttle body is there hesitation, does it open/close all the way, etc? If you answered "yes" to any of those, look at your throttle stop and kick down (if automatic)
I'd Check the injector too while I'm at it. Does it pulse constantly? There may be a ground issue. or a problem with the ECU.
Another place to look: On the smaller engines with TBIs the male connector cable likes to rock in out of the receptacle. make sure it's tight.
Hope this helps
Posted on Apr 01, 2010
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