I have a 1991 chevy suburban r1500 suburban that will not crank and the fuel pump will not kick on when turning the key, I checked my battery and its good, I checked my starter which was good and used my warranty to get a new one anyways, checked my fuse box and I was thinking the dealership fuse labled crank was the right one. I pulled the fuse and tested a few on the pin slots at 12v. But since there are 6 prongs for this one fuse and slot im not sure it as the right one. I also replaced the ignition switch. So im trying to figure out why when I turn the key over the truck will not crank and the fuel pump will not run. All lights and radio work however. I tried starting the truck in neutral but the key wont turn all the way over unless in park. Hoping I dont have to take the cilumn apart. I have a steel collar around it that I dont want to grind off. This is already a nightmare
1991 r1500 chevy suburban engine wont turn on and fuel pump does not kick on either
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zora
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it would help if you could find a wiring diagram, do you have a Hanes or Chilton manual? Concerning trying to start in neutral, cannt you turn the key while in park to the run position to release the shifter and then move it to neutral. You could have a bad neutral safety switch which could be jumped. The other thought is there may be a relay in the circuit which is bad.
I dont have a manual for this truck, up untill now I havent needed one, its been the easist vehicle to work on, now anyways I can move the shifter to neutral without the key in the ignition and with them in the ignition with the key forward, however the key will not turn all the way forward unless in the park position
I'm not sure on a 91 model, but in earlier year model vehicles, you could always run a wire from the hot post on the battery to the positive side of the coil and jump the starter solenoid to start one. If it starts that way, then you've eliminated a fuel problem and will know there's a short in the starting circuit. Give that a shot and post back.
Well that sounds more reasonable. Ill try that this weekend, so basically the simplest way I can say this is im looking for a problem in what causes both the fuel pump to run and the truck to turn over? Maybe on the same circuit somewhere? Im not sure, ive heard to check my starter and similar issues, but if it were the starter the fueL pump would at least kick on when I turned the key over. Then I heard well check your fuel pump, and once again, when I turned the key with a bad fuel pump i would have at least had a cold start the first time or two. A fuel pump relay switch wouldnt cause it to not turn over at least once when I tried to start it. I was told to try to start the truck in neutral and if it turned over then i had a bad neutral safety switch, but the key wouldnt even turn past the accessory position so I guess the neutral safety switch is okay too, anymore advice I can try on friday?
I'm going back through your post and wondering if there's a fuse for the fuel pump? If so, maybe that's blown and all that's wrong with it. Perhaps we're all over looking the obvious problem? IDK where your fuse box is and if you have one under the hood and under the dash or not. I'm not very familiar with Chevy's. Been a Mopar man all of my life. I have my last GM product sitting in the drive way now, just waiting for cooler weather so I can check the purge canister and purge solenoid to get rid of the gas smell. I'm thinking the sorry SOB at the stealership may have unplugged one or the other.
90AZBurban
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I had a fuel issue on my 90 Burban that was finally resolved by replacing the computer. There is a red wire going to the relays that allows you to bypass the computer and turn on the fuel pump by jumping it with 12V. If you are not getting it to crank over though, it sounds like the ignition switch (not the key ignition) down on the column.
Well I replaced the ignition switch on the top of the column. Had to drop the column to get to it. Was a pain in the ass. Anything besides that that could be we wrong? That would control the crank and the fuel pump.
I gotta get me a manuel soon. I followed the fuel pump wiring back and it goes to a box on the wall that has for wire harness conectors to it that im guessing goes to the fuse box, but I dont know which fuse controls the fuel pump, I found three
labled ignition, crank, and power. Any idea what fuse it may be?
labled ignition, crank, and power. Any idea what fuse it may be?
So after doing more research and attempts I found out what I was trying to figure out, the ignition coil is what sends a signal to kick the starter and fuel pump on, but when I checked the voltage of the main wiring to the ignition coil I picked up no voltage, now im trying to figure out where the wiring goes and the next step to take, so I have no power to my ignition coil