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I bought a 1992 f150 xlt not too long ago. It has a 5.0 302 in it. So far I’ve done the basic tune up things. Plugs and wires and such. We got it started up for the first time and it loves to flood and soak the plugs. Thought it was a leaky injector so we changed all 8 of them figuring they were just old anyways. Still likes to flood. I’ve changed the MAP sensor, changed the TPS sensor, cleaned the IAC, replaced ignition control module. I’ve made sure the fuel pressure regulator is good and it is. Engine still floods. The only way I get it to crank is if I take the plugs out and dry and clean them and leave them out overnight. But after I let it sit and get cold again it won’t start just floods out. When i can get it cranked it runs really rich but idles fine. I’m super stumped and don’t know really where to go with it anymore. Please help me out.
Did some research and my truck does not have a Crank position sensor. The computer relies on the pickup coil for that. Could a faulty coolant temperature sensor cause this issue?
No, if you get a coolant temp reading on your cluster, no reason to replace it. I would take the computer out and examine the board. These trucks always blow a couple capacitors which causes similar problems.
When you replaced the TPS was it properly adjusted to 0.5 to 1.0 volts?
Make sure your not getting fuel in the vacuum line of the pressure regulator. I have never see one fail on a Ford but I had one on a Toyota fail once and it was sucking raw fuel through the vacuum connection to the fuel pressure regulator.
Yes I adjusted the TPS correctly and I made sure the fuel regulator was not sucking raw fuel. I’ve been stumped on what it could be. Taking the computer out today to check it out.
The Engine Coolant Temperature (ECT) sensor and the temperature sending unit are two different things.
The ECT sends a signal to the computer.
The sending unit operates the temperature gauge.
When you cycle the key to the run position, the fuel pump should come on for about two seconds, then shut back off. If you do this with the hood up, you should be able to hear the fuel pump relay click on, then click off.
Pull engine codes, with the engine up to operating temperature. The codes will point you in the right direction.
Engine keeps flooding
