Fuel pump wiring troubleshooting help
Thread Starter
Instructor
Joined: Mar 2016
Posts: 204
Likes: 2
Fuel pump wiring troubleshooting help
So yesderday started my 82 vet cfi started fine ran good then moved it just died out i taught it was a faulty fuel pump but its not
Fuse box fuel pump fuse it self fine not cracked or poped but does not get any power to either side of terminal
Fuel pump relay the one in battey box getting power to the orange wire but the others nothing
Ecm fuse ok
Injectors getting power and fuses ok
The pump if i run power and ground i can hear it turn on but even doin the bypass still not pushing fuel
Fuse box fuel pump fuse it self fine not cracked or poped but does not get any power to either side of terminal
Fuel pump relay the one in battey box getting power to the orange wire but the others nothing
Ecm fuse ok
Injectors getting power and fuses ok
The pump if i run power and ground i can hear it turn on but even doin the bypass still not pushing fuel
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
the old 82 pumps were not very good when they were new. replace with 85-87 pump .If there is no fuel coming out at the fuel filter ,then the pump is bad or the pump sock is plugged.,
Last edited by terry82; Sep 12, 2016 at 10:03 PM.
Thread Starter
Instructor
Joined: Mar 2016
Posts: 204
Likes: 2
Put the oilpressure switch still nothing only getting power to orange wire on relay nothing else no power is there a way to test the relay also got the new 85 but didnt install yet still no power to the fuse panel
Melting Slicks
Joined: Nov 2005
Posts: 2,143
Likes: 489
From: Leonardtown Maryland
You don't say if you got any codes or not, but there are some procedures on page 6E-24 of your Service Manual you can use to troubleshoot the fuel pump relay and associated circuits. It should help find the missing 12 volts.
Last edited by Bigredwing; Sep 13, 2016 at 03:09 PM.
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Thread Starter
Instructor
Joined: Mar 2016
Posts: 204
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By doin this i have power all the way to the fuel pump and turns on but nothing comin out at tbs i didnt install the new pump yet but the old one turns on so is this relay no good
Last edited by lancer013; Sep 13, 2016 at 11:43 PM.
Thread Starter
Instructor
Joined: Mar 2016
Posts: 204
Likes: 2
If i turn key after couple second it gets power from white and tan to red so relay good then cranking engine after couple seconds the fuse panel gets power but still no fuel will install new pump and c if that makes a difference