Question about 1984 Ford LTD
It usually starta right up the first time, but if you turn it off you have to shoot starter fluid in it to get it to start again. it is fuel injected
check to see that you have fuel all the way to the engine.to do this: pull the fuel pump fuse and, crank the engine a few times to releive pressure then open the fuel line, cover it with a rag for safety then: replace the fuse and, crank the engine just for a second or, two if no fuel comes out it's another fuel filter probably on the truck frame rail that is the problem or, low pressure from the fuel pump
Posted on Apr 21, 2009
Not likely. I believe the injectors have 12 volts going to them all the time. The PCM then grounds them so they operate when the crankshaft or camshaft sensor tell the PCM when the cylinder is on compression stroke.
I would check for an injector fuse first (see owner manual), and then check to see if you have a bad crank or camshaft sensor.
The PCM very rarely fails.
Section 03-14: Engine Controls, Electronic 1994 All Aerostar, Ranger, and Explorer Vehicles Workshop Manual
DESCRIPTION AND OPERATION Powertrain Control Module (PCM) The center of the EEC-IV system is a microprocessor called the powertrain control module . It receives data from various sensors:
Posted on Aug 27, 2009
SOURCE: 1991 Ford E-250 5.8L
Hello! The Throttle Positioning Sensor (TPS) is defective...It is bolted to the throttle body...It is a round black device about the size of a 1/2 dollar, with a mounting hole on each side...It has a 3 wire connector...Wire colors are...Gray/White...Gray/Red...And Brown/White...Cost $55...Use 2 safety pins...Push the pointed end into the rear of the connector on the Gray/White wire and the other on the Gray/Red wire...Do not disconnect the connector...Set a volt meter to read a maximum of 5 volts...Place the + probe on the Gray/White wire...The - probe on the Gray/Red...Turn the key to on...Voltage must be less then 1 volt (.85)...If not TPS is defective...
Do not move probes...Start the engine (if you can)...Watch the meter...Slowly increase the throttle...Voltage must rise to 4 volts (wide open throttle)...As voltage rises...If the voltage skips, jumps, or acts erratic the TPS is defective...
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Posted on Jul 15, 2010
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The computer controls the injection of the fuel. If you look at the wiring diagram you will note the bottom 4 pins that are the negative and positive to the left and right injection. Atleast on my 1991 it is .Could be the ecm or computer is sending a false signal or not sending one at all. A sign of this is the fuel pump in the gas tank can be heard and will continue to run as if pressure in the fuel system is not building. Tthe truck want crank as if no fuel. When starter fluid is injected into the Throttle body the egine will start and run untill fluid is used up. It will keep running as long as fluid is added.
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