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Re: Fuel pump not working - relay location? [Re: hazy_daze] #826967 07/27/07 07:17 PM
Joined: Apr 2007
Posts: 56
I
inokiyo Offline OP
Getting the Wheeling Fever
Thanks hazy daze!

Man those tiny bolts/nuts are intimidating!

Re: Fuel pump not working - relay location? [Re: inokiyo] #826968 07/27/07 10:52 PM
Joined: May 2005
Posts: 927
8
89IsMine Offline
Rock Warrior
*****
Quote
Thanks hazy daze!

Man those tiny bolts/nuts are intimidating!


PBBlaster and lots of patience <img src="/forums/images/graemlins/kewl.gif" alt="" />

Eric W.


'89 Dodge Raider -- 3.0L V6, MT, SWB
Re: Fuel pump not working - relay location? [Re: 89IsMine] #826969 08/15/07 06:21 AM
Joined: Apr 2007
Posts: 56
I
inokiyo Offline OP
Getting the Wheeling Fever
So the tiny bolts weren't an issue. PB Blaster did it's job and they came of with patience.
The fuel hose was the criminal. I tried and tried to get it off the other end with no success. I now have bruised knuckles, oil and crud in my eye and a no start vehicle.
Well, at least I tried and was almost there with great advice from all of you! Thanks guys, really appreciate your support!!
They car was towed to a mechanic, who is expensive but one I know and trust. I guess there is a reason mechanics get paid.
Thanks again, you guys are great!
I will post results soon I hope!!
Ken

Re: Fuel pump not working - relay location? [Re: inokiyo] #826970 08/16/07 12:50 AM
Joined: Apr 2007
Posts: 56
I
inokiyo Offline OP
Getting the Wheeling Fever
Well, the mechanic replaced the fuel pump, and no go.
There is no power going to the pump at all (should have checked that myself!).
We can't find the fuse and relay location.
Would anyone know?

Re: Fuel pump not working - relay location? [Re: inokiyo] #826971 08/16/07 03:16 AM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline
Web Wheeler
*****
ecu is under dash in passenger footwell. relay is on right sidewall of passenger footwell and quite high, above bottom of glovebox opening. Nearby will be an unconnected single wire terminal taped to it's harness, probably with blue tape. Look for 12v at this terminal while cranking. If you see voltage, there is a break in the fuel pump wire. If not, suspect relay. Apply 12v to above terminal from battery and listen for fuel pump run. This confirms relay to fuel pump wiring and pump function. If the new pump won't run on this test, suspect fuel pump power and ground paths, and supply test ground and repeat test. If pump nogo, bad relay-pump wire or bad new pump. Apply 12v direct to pump - nogo pump is bad new pump. Go pump is bad relay/pump wire.

Note that relay turns on pump two ways. In ign start, relay turns pump on. In ign. on, ecu controls relay, and only turns it on when it sees a tach signal in the last 2-3 seconds. No tach signal from the coil, and the fuel pump relay is turn off by the ecu. To test just the relay, you have to isolate that coil ground wire from the relay to the ecu, and ground it temporarily, and see if the fuel pump runs in ign on. To test the relay in ign start without grinding the starter, disco the smaller solenoid wire from the starter solenoid. Probably a female plug on a spade terminal on the solenoid. Then hold the switch in start and listen for fuel pump run.

Relay is a little tight on removal. remove glovebox...

There is no fuse in the fuel pump circuit past the ign switch. If you have 12v coming out of the switch on all the right wires, you don't have a fuse problem. Remove lower half of steering column shell and test the wires on the end of the ign switch. One should have power with switch off. That one is power in. One will have power in ign on, and another will have power only in ign start. These are the power outs, and while you should only have one power in, you might have more than two power outs. If no power in, check fusible links and big amp fuses at battery.


Not responsible for advice not taken...
Re: Fuel pump not working - relay location? [Re: fasteddy] #826972 08/16/07 06:14 AM
Joined: Apr 2007
Posts: 56
I
inokiyo Offline OP
Getting the Wheeling Fever
Thanks fasteddy!!
Well, my mechanic (I trust he is not bs'ing me) says the on top of no power to the fuel pump, car has no spark, the injectors are not working when cranking. He thinks it is the pick up coil on the distributor that has gone bad, or the ECU. He says the motor is basically the same as a Dodge Caravan, and has seen this before.
He's a good mechanic, but admits he has limited experience with Montero's. I thought I had spark, he says no, I don't get paid for working on my car (probably shouldn't have done it in the first place) he does due to his expertise (and I trust him).
Would appreciate any info and feedback.
Thanks!

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