Top 20 1986 GMC S-15 Questions & Answers

at school and learning about vehicles good move ---now the next good move is to get a workshop manual for the vehicle and read it thoroughly as a working knowledge of vehicles is only learnt from trial and error after reading it from a book you first lesson is learning what firing order is and seeing that the cap is on correctly and the wires are going to the correct plugs

My first guess would be a very bad vacuum leak, second guess would be fuel starvation. Check hoses for cracking ,breakage, check fuel filters from tank to engine. GOOD LUCK FRIEND.

hi, If the radio is an after market there may be an inline fuse plus the one in the fuse panel. check for power at the radio with a test light also check the ground. Don

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radio doesn't work. she got out of the car, the quit she got back in and the radio was dead. fuse 56 a 20 amp fuse is good, 6 a 5 amp fuse is good. 20 is a 10 amp fuse is dead with the fuse is good. could the door switch has somthing to do with it.

The pump uses a relay and a fuse. The relay should be near the brake booster and the fuse should be in the fuse box.

check for blown fuses

Things you need to check:1. is there enough fuel in tank?2. You can hear fuel pump motor running? If your car has electronic fuel pump then most of the time these pumps are the main culprit. Its fitted inside the tank and you can hear its sound when you switch on the ignition key. Open the fuel filler cap and try to hear from there. If you cannot hear, check for fuel pump fuse under the hood. There should be a fuse box with diagram showing which fuse is of what thing in car. If nothing works, you probably need to replace the pump.3. If your car has manual pump (not electronic) then you should see a roundish thing under the hood connected to engine in which fuel line is coming from tank and then going to carb. Pull out the outlet pipe and crank the car for 10 sec. and see if you get any fuel. If not then this manual pump should be replaced.

Do you get dash warning lights when you turn the key and no crank ?One possibility is the ignition switch, another is the starter. If it has an automatic trans, there is a neutral safety switch to keep you from starting the engine in gear.

most people find this out after they put their boat in water. good time to service the rear brakes seeing it all has to come apart to change the cables. chances if the cables are siezed the rear adjusters are too!!!!!!!!!

Hi,my name brad, check for vaccum leaks,on the engine.

it sounds like a tire that has a shifted belt in it. I would have the tires checked

It sounds like you have rod knock in your engine. Stop driving your Jimmy and have a mechanic look at the engine immediately. You may have already damaged your block by having a rod poke through it.

I am only guessing at this since you did lose power. The rod closest to your flywheel might have broken or bent, causing a loss of power under load.

Sorry for your conundrum, and I hope this helped.

i would check to see if you are getting fire from the coil, if not, i would have the coil checked out , and if bad , replace it, "if you are still having problems with it not starting, then i would check the fuel pressure.

Turn the distributor to where it fires the best, snug it down slightly then remove the cap. look inside the cap and check for cracks and debris or a damaged rotor, Could be the module or the wires to it are the culpret, or the timing chain or belt has slipped, if so it may not start. Next try to safely turn the engine to where the pointer on the front behind the lowest pulley lines up with a line on the balancer, preferably at the 0 degree mark, look at the rotor position, maybe put a mark on the housing, set the cap back on and see if the rotor is inline with a plug wire, if not rotate the distributor to the point of alignment, the shaft should not turn but the housing will turn around it. This only a crude quick check but might get you going.

hi sorry for the info you got, sounds like there could be a few things i would check before the advice given. change fuel filter, a partially clogged filter will not allow enough gas through, also if air filter is dirty or mass air flow sensor is dirty this can happen as well, a clogged exhaust whether muffler or cat convertor can cause issues as well. spark plug wires that are old break down under load as well. timing could be off a bit due to a worn belt/chain usually belt.. also bad gas with low octane can cause lack of power.. just some ideas i hope help you out....good luck...

Hi, The spacer you are calling the pivot bar ,is to make it have a tight fit if you have all the bolts out get a big screw driver or pry bar and pry alternator away form bracket. To make it easyer to put new one on tap the spacer back in some and install the bolt that goes thru it will tighten it down. If i can help you any more just re post. thank

Hi!!Replace fuel pump relay ASAP, it is stuck open and the pump will be damaged. It is located on the engine compartment fuse box. Disconnect negative cable from battery in the mean time.
Good Luck!!

test fuse if fuse is good check wires if all wires are good may be internal inside of radio

check fuse inspect wires if fuse is good