No fuel issue
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8th Gear
Joined: Jun 2022
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No fuel issue
My 94 f150 5.8 went for a swim a few months ago. I drained the tanks, filled with fresh premium gas, new fuel filter, plugs, oil/filter. Computer got toasted so I’ve replaced it with an exact match. I can only get it to run if I dump gas down the intake. I have a pressure gauge on the rail and I’m running good pressure koeo and while running. Runs pretty decent when it’s running but will die out as soon as the gas from the intake is gone. What are good areas to check?
Last edited by Troylj; Jun 18, 2022 at 03:21 PM.
Tuned
Joined: Jan 2021
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What would good pressure be? Does it drop off as the engine is running or stay constant? Are the injectors firing? There is very little between the rail and the injectors that could restrict fuel flow except non-firing injectors.
Tuned
Joined: Jan 2021
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8th Gear
Joined: Jun 2022
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It is the exact match ecu and not a used one. I could check those sensors. Just an ohm test for resistance? Would that let the truck run fine while dumping fuel down the intake though?
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Tuned
Joined: Jan 2021
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Be careful with "Exact Match" and "Not Used" unless somebody had one sitting on a shelf somewhere, it's at the very least remand.
As for testing the sensors, you would have do to some research. I am just tossing out other options. The ECU is the final step in when/if they fire based on several other factors.
As for testing the sensors, you would have do to some research. I am just tossing out other options. The ECU is the final step in when/if they fire based on several other factors.
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Cargo Master
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I honestly don't, but EEC-IV is pretty simple. I imagine it wants to see a tach signal (maybe I'm wrong) but yeah ECM tells injectors to fire. It's just batch fire so one side then the other.
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8th Gear
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Still confused. I thought maybe it was the pip in the distributor. I took the distributor out and connected a ground clamp to it. While I turned the distributor gear I could definitely hear the injectors opening and fuel pump sending more fuel. Still won’t run with out fueling manually though
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