ignition
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Joined: May 2003
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ignition
have a 5.0 fuel inj "91" f 150 can keep my trk runin w/the key but when i let off the key it dies. i can get it to run though by applyin the fuel. then it will start every time but let it sit over night same thing, just had probs w/the ignition mod changed that and coil but ended up with this prob
can you help
can you help
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Joined: Jan 2001
Posts: 56,973
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From: Virginia
ignition
I would check the wiring and plug to the ignition module.
When you start the truck, the switch sends power directly to the fuel pump relay.
After it starts, the ignition module sends pulses from the distributor to the computer. This tells the computer the engine is running, so the computer sends a signal to the fuel pump relay to keep it energized. If the computer doesn't see the pulses from the distributor, it assumes the engine is not running, and does not turn on the fuel pump relay.
When you start the truck, the switch sends power directly to the fuel pump relay.
After it starts, the ignition module sends pulses from the distributor to the computer. This tells the computer the engine is running, so the computer sends a signal to the fuel pump relay to keep it energized. If the computer doesn't see the pulses from the distributor, it assumes the engine is not running, and does not turn on the fuel pump relay.
Thread Starter
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New User
Joined: May 2003
Posts: 4
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ignition
i've check the plug and all seems to be ok there is however what seems to be a removeable fuse link could that need to be replaced.
There is a capacitor mounted on my coil.
Should I replace that as well?
Could either of these items have play in my prob ?
I've replaced everything else: cap , rotor, coil, ingntion mod, plugs and wires.
Maybe my fuel relay is going bad?
There is a capacitor mounted on my coil.
Should I replace that as well?
Could either of these items have play in my prob ?
I've replaced everything else: cap , rotor, coil, ingntion mod, plugs and wires.
Maybe my fuel relay is going bad?
