Question about 1986 Ford Ranger 2WD

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Fuel pump wireing

Not getting fuel from pump to engine

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Toyota Tacoma fuel problem


Check the following:
- Listen to the fuel pump noise under the fuel tank.
- Starter signal.
- EFI relay, under the hood fuse and relay box.
- Fuel pump operation and pressure.
- Regulating valve.
- Circuit Opening Relay (COR) under the dash.
- Check for open in harness and connector between circuit opening relay and fuel pump, and fuel pump and body ground

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Hope that works. Thank you for visiting Fixya.

Mar 18, 2014 | 1998 Toyota Tacoma

1 Answer

1986 hilux fuel pump not working


First, I'm guessing your truck is fuel injected right? If so, the first thing to do would be to check the power going to the pump. The pump is in the tank (if fuel injected) if carb engine then you have a manual pump on the engine head. Some Toyota's came both ways all the way up to '89-90 models. But, locate the wires going to the pump near the tank, the 2 biggest wires will be the power wire and ground wire to pump, with volt meter have someone spin engine over while you check both wires to see if you are getting 12 volts to 1 of them.
If you are, then you have a bad pump, if you don't have 12 volts to either wire, then you will need to identify the fuel pump relay. The relay is located in a few different locations on the older model Toyota's, I'm sorry but without seeing it myself I can't pinpoint exactly where the relay is. Have you checked the relay center under the hood? Hope this helps.

Dec 10, 2013 | Toyota Cars & Trucks

1 Answer

Dion engine


Check ignition and gas.

Listen for the fuel pump to come on for a couple of seconds with key ON. If you hear it, pump is working, check for gas at the fuel rail on top of engine. Should have gas under pressure.
If pump doesn't come on, check the fuel pump fuse, check fuel pump relay. Last, use a test light or voltmeter and check if the fuel pump wire has power to the gas tank connector when the engine is cranked over. If power there, fuel pump will need taken out and replaced. If no power at the pump, pump circuit needs checked.

Check ignition by checking for spark at a plug wire end. Pull off plug wire from spark plug, push the boot back so metal end terminal is exposed. Hold the end terminal 1/4 inch from a grounding source like a metal bracket or bolt on engine. Have a helper crank the engine over and watch for a spark-you need to see a blue snapping spark to know the ignition is good. Maybe wear gloves or use a heavy rag holding the wire-you can get shocked if not held close to a ground. Another way is to pull off the wire from plug, remove plug from engine, then re-attach plug to plug wire, and lay the plug on top of engine where the plug threads are touching metal-now the plug is grounded. You will not have to hold the wire. Have the helper crank the engine, while you watch for spark at the spark plug end. If you have a blue snapping spark, ignition is good. It is a good idea to check for spark on more than one plug wire-maybe another coil is not firing.
If your ignition is good, and you hear the pump come on, possibly a weak pump not putting out enough pressure- then check fuel pressure with a fuel pressure gauge. Fuel injection requires high pressure, so the injectors will spray fuel out.
If still no go, scan computer for trouble codes. Check if your security or theft deterrent has immobilized the car.
Good luck.

Sep 29, 2013 | Mitsubishi Cars & Trucks

1 Answer

Electrical problem for the fuel no power


A lot of newer vehicles have a fuel pump cutout switch on the engine. If the engine shuts down for any abnormal reason, it loses oil pressure and one of the things that happens is the fuel pump is cutoff. This is a safety item in case of an accident which shuts off the engine. Check for the oil pressure cutout switch on the engine, which is usually different from the oil pressure gauge or light switch. Can't say exactly where it is, sometimes on the upper rear part of the engine behind intake manifold or on lower side of engine right into the block. The fuel pump run circuit is different from the fuel gauge circuit although they usually run in the same wiring harness if the fuel pump is in the tank. If the pump is not in the tank then the fuel level sender in the tank is probably defective and should be replaced.

May 12, 2013 | 2001 GMC Savana

1 Answer

Getting fuell to carb new fuel pump and filters will start whn fuel is poured in carb


if computer command truck with an ECM replace the engine's oil pressure sensor. It has 3 wires to it and one runs to the fuel pump to prime upon starting the engine. Once oil pressure is acheived the computer switches that senors wires circuit off and turns on the fuel pump relay to take over the fuel pumps operations till you shut the engine off

Aug 07, 2011 | GMC K1500 Cars & Trucks

1 Answer

Im working on a 1986 toyota pickup 2.4l efi non turbo 4x4 i replaced the head gasket and i have a black wire coming from the intake wiring harness that has no plug on it .if i touch this wire to a hot wire...


Sounds like this wire should operate the electric fuel pump through the fuel pump relay.The fuel pump relay should start the fuel pump to maintain fuel supply to the common fuel rail and any surplus fuel will be bleed back to tank by pressure control.The injector opening sequence is contolled by computer once the engine is properly timed.
If you say the engine runs for a few seconds it would indicate fuel pump or relay is not getting power to operate or fuel pump is not delivering enough pressure to feed the injectors

Apr 29, 2011 | 1986 Toyota Pickup 4WD

2 Answers

I have a 91 s-10 that wont run...fuel pump runs and I am getting fuel to the carb all brand new plugs and wires and ignition coil and module and new cap and rotor? fires up and dies out?


The fuel pump relay is at fault. The engine will start running off the oil pressure sensor for the 3rd wire connected to the sensor feeds power to the fuel pump which makes your truck start right up. When the engine achomplish the standard oil pressure as needed the sensor shuts power off by the PCM default system and turns on the fuel pump relay to continue working the fuel pump. replace the relay and you will be driving around again

Mar 28, 2010 | 1985 Chevrolet Chevy

2 Answers

I am not getting any fuel to the engine. The fuel pump could be bad or there is not any electricity going to the fuel pump..Is there a fuse to the fuel pump on a 1978 datsun 280Z?


No dont think so as the pump is fitted to the engine isent it
if not and there is no pump on engine or on eletric one under the bonnet then it must be in the tank .
(But in 78 they were on engine)
Find pump in elect pump put feed wire to pump and it should (tick) if Man pump then take off and get recoed.

Oct 01, 2009 | Datsun 720 Cars & Trucks

1 Answer

Wont start


Where the car runs on starter cleaner, this is definitely a fuel problem...

Could be a few things:

Do you hear the fuel pump running outside the car (for a few seconds) when you turn the key on (engine off)?

If not it might be the pump or the pump relay (in the engine compartment fuse and relay box)

If so, it might be:
Clogged inline fuel filter (in the fuel line from the pump to the engine)
Bad fuel pressure regulator
Bad injectors/wiring

Did you check the fuse and wires to see if you have power (and a good ground) to your engine computer (controls fuel injectors), this could also be the culprit (without power to the computer there is no way for the engine to get fuel).

Aug 27, 2008 | 2001 Oldsmobile Alero

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