wvfarmboy Posted July 29, 2021 Share Posted July 29, 2021 bought a not bad looking truck cheep, i think everyone has worked on it at some point, turn key on i here fuel pump run, it dont ever shut off, i would think the fuel would just go back to the tank and the only way fuel gets in motor is through injectors am i thinking right?/ and is there 2 fuel pump relays?? have one under hood and anouther under eec hanging there might be wired in big question do i need to replace the eec and injectors then deal with relays or what else can make it get to much gas, any ideasbefore i put a carb and intake on it thanks for any in put Link to comment Share on other sites More sharing options...
FuzzFace2 Posted July 30, 2021 Share Posted July 30, 2021 How do you know its flooding with gas, what signs tell you this? How old / miles on the injectors? I see it as they either leak, worn out or the eec it telling then to stay open I can't see any other way. Maybe pressure regulator? Dave ---- Link to comment Share on other sites More sharing options...
wvfarmboy Posted July 30, 2021 Author Share Posted July 30, 2021 How do you know its flooding with gas, what signs tell you this? How old / miles on the injectors? I see it as they either leak, worn out or the eec it telling then to stay open I can't see any other way. Maybe pressure regulator? Dave ---- black smoke , faling spark plugs, and oil has a lot to much gas in it, smells gasie so its floding, showing 9800 miles mighta turned over a few times so plenty of miles i thought i would replace fuel regulator first and go from there, kinda thinking injectors aswell and go from there, just looking to talk to someone who has been through this. Link to comment Share on other sites More sharing options...
85lebaront2 Posted July 30, 2021 Share Posted July 30, 2021 black smoke , faling spark plugs, and oil has a lot to much gas in it, smells gasie so its floding, showing 9800 miles mighta turned over a few times so plenty of miles i thought i would replace fuel regulator first and go from there, kinda thinking injectors aswell and go from there, just looking to talk to someone who has been through this. If it seems to be pig rich, check the collection of solenoid valves behind the battery. One of the items in there is the MAP (Manifold Absolute Pressure) sensor. It needs to have a good vacuum signal from the intake, any cracks or leaks in the line from the fitting on the upper plenum to that will make the system think you are at wide open throttle and go full rich. The other item is grounds, on the 1985-86 5.0L EFI the entire system grounds to the battery negative post. Wiring on these is also a problem, I have seen a number of these where the insulation has crumbled. The injectors are set up as two groups of four, four end (1458) and four center (2367), if only four of the plugs (one of the two groups) are badly fouled, one of two things, a grounded control circuit for the injectors or a bad computer. Link to comment Share on other sites More sharing options...
wvfarmboy Posted July 30, 2021 Author Share Posted July 30, 2021 If it seems to be pig rich, check the collection of solenoid valves behind the battery. One of the items in there is the MAP (Manifold Absolute Pressure) sensor. It needs to have a good vacuum signal from the intake, any cracks or leaks in the line from the fitting on the upper plenum to that will make the system think you are at wide open throttle and go full rich. The other item is grounds, on the 1985-86 5.0L EFI the entire system grounds to the battery negative post. Wiring on these is also a problem, I have seen a number of these where the insulation has crumbled. The injectors are set up as two groups of four, four end (1458) and four center (2367), if only four of the plugs (one of the two groups) are badly fouled, one of two things, a grounded control circuit for the injectors or a bad computer. thanks will look tomorow Link to comment Share on other sites More sharing options...
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