1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

85 gsl fuel problem

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Old 07-28-11, 05:47 PM
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85 gsl fuel problem

Alright... Ive done searching and cant really find any answers so here goes... I've been working on the 7 to get it back on the road and I had it running good but just the other day it won't stay running for more than a minute, idle or foot on the pedal. I put clear fuel lines on it to see if I was getting fuel. I start it, the lines fill up and it runs fine but then air bubbles start coming from the carb in the inlet line until its empty and dies... Then itll fill up again and start right up, then do the same again. Fp is good anId working as I can hear it running. I tested voltage at the fuel cut relay and I get power to all 4 wires but the black wire seems weak and clicks when I touch the test light to it... Maybe a bad relay??? Sorry for the long, drawn out post but I didnt want to leave anything out...oh its all stock fuel system to my knowledge and I have changed my filter as well... Anything is appreciated
Old 07-28-11, 08:10 PM
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Fuel pump cut relay has a Black/yellow stripe wire, a Blue/white wire and 2 Black/white wires. The Blue/white wire goes to + side of fuel pump. The Black/white wires are both 12v from the ignition switch. Black/yellow comes from the ECU. When the car is running there should be 12V in the Blue/white wire and the Black/yellow wire should be grounded. Anytime the ignition is on the Black/white wires should have 12v. To test the relay, disconnect the plug and install a jumper wire between the Blue/white wire and either of the Black/white wires. With this jumper in place the fuel pump should get 12v whenever the ignition is on.
Old 07-28-11, 08:18 PM
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Ok and this will bypass the relay? Thanks for the fast response ill give that a go!
Old 07-28-11, 09:33 PM
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You sir... Are my hero lol fashioned me a jumper and its up and going good, thanks a million!!!
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