Another fuel pump problem, need help
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Another fuel pump problem, need help
1987,F250, 5.0 with dual tanks. Not getting power to the electric high press. pump. No power at the inertia switch.
There is power at the fuel pump relay. (replaced)
Is there a wiring diagram available?
Larry M
There is power at the fuel pump relay. (replaced)
Is there a wiring diagram available?
Larry M
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From: Easton,Ks
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From: Easton,Ks
Note that the fuel pumps only will run with the engine cranking or running other than for one second when you first turn on the key.
The EEC computer must receive a pulse train from the Ignition system to turn on the fuel pumps other than the one-second initially.
The EEC computer must receive a pulse train from the Ignition system to turn on the fuel pumps other than the one-second initially.
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From: st.thomas
There is two sensers for the pumps mounted on fender well, my 89 had duel tanks and thats what went wrong, there was power to the pump but the senser completes the circuit, two minutes to change it, 10 hours to find it....
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From: Easton,Ks
Originally Posted by garywh
There is two sensers for the pumps mounted on fender well, my 89 had duel tanks and thats what went wrong, there was power to the pump but the senser completes the circuit, two minutes to change it, 10 hours to find it....
Do you mean the EEC Power relay and the Fuel Pump relay?
Let’s not confuse Larry M.
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From: st.thomas
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Hey guys, thanks for all the help. Problem solved. It was a relay.
Point of interest for the future; This truck has three relays side by side. In color they are gray, green and brown. One is for the electric fuel pump, the brown one and last replaced. I believe the gray one is for the EEC. Not sure about the green one.
Bill K you are the man. Many thanks.
Larry M
Point of interest for the future; This truck has three relays side by side. In color they are gray, green and brown. One is for the electric fuel pump, the brown one and last replaced. I believe the gray one is for the EEC. Not sure about the green one.
Bill K you are the man. Many thanks.
Larry M
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From: Easton,Ks
Originally Posted by Larry Murray
Hey guys, thanks for all the help. Problem solved. It was a relay.
Point of interest for the future; This truck has three relays side by side. In color they are gray, green and brown. One is for the electric fuel pump, the brown one and last replaced. I believe the gray one is for the EEC. Not sure about the green one.
Bill K you are the man. Many thanks.
Larry M
Point of interest for the future; This truck has three relays side by side. In color they are gray, green and brown. One is for the electric fuel pump, the brown one and last replaced. I believe the gray one is for the EEC. Not sure about the green one.
Bill K you are the man. Many thanks.
Larry M
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Thanks for the information.
One last question regarding the relays. As I understand it the green one is for the fuel pump, the brown one for the EEC. How about the gray one. What does it control?
Larry M.
One last question regarding the relays. As I understand it the green one is for the fuel pump, the brown one for the EEC. How about the gray one. What does it control?
Larry M.