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I have a big question? i have a 91 chevy s-10 blazer 4.3 liter. i need to know where the fuel pump relay fuse is and i cant find it.. however, i also need to know if it has two fuel filters..
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What is liter size of engine? Engine cranking do you have spark at the plugs? I'm just trying to figure if you have more than one problem? If your missing spark--fuel pump--fuel injector pulse, I'd have to check for rpm signal.
The picture is for a v6. You can see the fuse, check it, if you haven't already. You can unplug fuel pump relay, use jumper wire between terminals 3 and 5, the load side of relay. Hopefully the pump will run. If it runs with jumper but not w/o, the problem is on control side of relay. The control side needs voltage and ground. The ground is a chassis ground. voltage for control side comes from computer.
The fuel pump assembly consists of fuel pump relay,fuel sensor,the fuel pump controlling fuse,its ECM B fuse.
The fuel pump and oil pressure switch.
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For its wiring diagram, click the link below and refer the diagram:---
http://technoanswers.blogspot.com/2011/10/fuel-pump-wiring-diagram-for-1998-chevy.html
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This should help.Thanks.Helpmech.
The fuel pump relay in my blazer is located in the rear of the glove box which means you have to clean out all of the maps and other junk to get to it. There is a plastic cover that has to be removed to expose the relay which is the right side of the two present.
You can tell if it is operating when you turn the ignition key to "ON", the relay will click and you should hear a humming sound as the fuel pump energizes.
ok, well as for the relay, yes there is one in your under hood fuse box....or inside the drivers door...but if you don't hear the pump, fear the worst, it may be dead.....happens ALOT.....check and change the relay, about $10, then if nothing, time for a new pump.
DID YOU CHECK THE FUEL PUMP FUSE AND RELAY.AND THE FUEL INJECTOR FUSE.SOUNDS LIKE FUEL PUMP NOT WORKING.YOU ARE NOT GETTING FUEL TO THE LINE.NOW IF FUEL PUMP IS RUNNING.THEN THE LINE COULD BE PLUGGED.
FUSE SHOULD BE UNDER THE DASHBOARD ON THE DRIVERS' SIDE. WHEN YOU CHANGED THE PUMP, YOU NEED TO CHANGE THE FUEL FILTER AS WELL TO MAINTAIN THE WARANTY. I WOULD CHANGE THE FUSE AND FILTER. HOPE THIS HELPS. LET ME KNOW HOW YOUR DOING. BEST OF LUCK
The fuel pump relay is only for the fuel pump priming when you turn on the key. After the vehicle starts the oil pressure switch takes over and runs the pump. If the pump is shutting off after the motor is running the oil pressure swith is probably bad. Let me know if i can help you further.
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