Question about 1991 Oldsmobile Cutlass Supreme

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There is a wire hanging from my fuel pump relay does it need to be plugged in somewhere if so where and is this why my car will not start every day. 1991 olds cutlass supreme

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Yes

Posted on Jul 21, 2009

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My 2002 chevy tahoe has a gremlin. it wouldn't start last week. I checked the fuel pump relay and when I plugged it back in the tahoe started. now when it won't start I unplug the relay and plug it ba


Tell a repair shop that knows the answer to
your relay removal routine

If you had a wiring diagram, you could see what
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There is a switch in the airflow meter that keeps the fuel pump relay closed as long as there is airflow. With the meter unplugged, the pump should not run except when the key is turned to start. It would seem to me that you have a wiring issue. Try jumping the fuel pump relay so the pump runs whenever the key is on. (Remove the relay and jump the pump wire to the accessory wire--see top left diagram.) This defeats the safety feature but will keep the pump running.

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I have a 98 cadillac deville & after all this cold weather in atlanta the car wouldnt start i was told it was the fuel pump & i also change the relay. It work well for one whole day & once i...


he was hooking a hot wire to the fuel pump. hes right your loosing power somewhere in the power supply to the fuel pump. it needs to be traced down to see where the power loss is. the short or loss of power could be anywhere in the line. hope this helps

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I have a 92 240 that blew fuse to fuel pump.Replaced fuse,drove 2 days and since then will not start.Fuel pump tested good,can not locate fuel relay.


new fuel filter when replaced the pump? might have a bare wire somewhere causing the fuse to blow usually the relay is under hood with main fusses and secondary being under dash or in glove box.

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1 Answer

Fuel Pump wiring


If I understand right, I would say the normal ground for the pump is bad.
"I am guessing the pump uses a ground source to start." well, just the normal ground like for any motor, you have the power wire (gray) to the pump, then the ground wire for pump, does it branch off near the tank and find a ground? Or does it go into the tank connector and then routed back somewhere through the wiring harness? Anyway, it has to go to ground somewhere. You have the wiring right it sounds,. just make a good ground source, or find the original ground and repair it.

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First thing I would do is change your fuel filter. Check all vacuum lines and all your wire connections. Also check fuel pump relay to see if it is faulty or if there is shorted wires under the relay or fuse blocks.

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replace the fuel pump relay. in the underhood fuse/relay box in front of the master cylinder.

May 06, 2009 | 1998 GMC Sonoma

1 Answer

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if you have a 1.8-2.7- or 1.2 engine change the distributor cap and plugs and wires check timing also .it could be problems with the led photodiode in distributor. for the 2.2 and 3.3 it distributorless they have crank sensor and cam sensor. you will need a scanner to check those sensors. check to see which one of theses engines your vechicle have. go from there . your fuel pump relay should be in the engine compartment.

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I think you have a bad fuel pump relay. The contacts on the relay have burned. thats why you have 13 volts when check it with a meter, but no pump. when you put a load on the circuit you have a voltage drop because the contacts in the fuel pump relay won't let enough current flow. Either that or you have a bad ground to your fuel pump. Alldata.com has all the wiring diagrams you need to diagnose this problem. good luck

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1 Answer

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There is probably a fuel relay somewhere in that circuit to, that may be faulty. Check your front drivers side inner fender by shock tower for 3 relays. It should be the middle one.

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