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Old 03-28-2009, 01:03 PM   #1
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85 4runner fuel pump

i can get the pump to work with the test plug but when you turn the key it dont come on. tried different ecu still nothing any suggestions.
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Old 03-28-2009, 01:32 PM   #2
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have you tried the fuel pump relay?
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Old 03-28-2009, 03:29 PM   #3
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i can get the pump to work with the test plug but when you turn the key it dont come on. tried different ecu still nothing any suggestions.
The fuel pump doesn't normally run with the key on, unless you have the test jumper installed:
- http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump

Only way it runs is if the AFM vane is held open. Test that AFM and if that is OK, then check the circuit opening relay (there is no fuel pump relay, per se).
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Old 03-28-2009, 05:39 PM   #4
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I have a COR for sale if thats your problem


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Old 03-28-2009, 07:06 PM   #5
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what is a cor. i checked relay it is efi. it dont even kick on to pressurize the system.
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Old 03-28-2009, 09:24 PM   #6
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what is a cor. i checked relay it is efi. it dont even kick on to pressurize the system.
Read the link 4Crawler posted, He knows what's up.


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The fuel pump doesn't normally run with the key on, unless you have the test jumper installed:
- http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump

Only way it runs is if the AFM vane is held open. Test that AFM and if that is OK, then check the circuit opening relay
Also,
http://www.personal.utulsa.edu/~nathan-buchanan/93fsm/
http://personal.utulsa.edu/~nathan-b...38circuito.pdf

Have you tried searching...?




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Old 03-29-2009, 12:45 PM   #7
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thanks for the help. got it figured out. feel kind of dumb didnt have tank in truck ran ground to it and started working.
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Old 03-29-2009, 12:45 PM
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22ret, 4runner, 86, 864, 87, 88, 89, efi, electric, fuel, prob, problems, pump, relay, runner

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