20 Most Recent 1985 GMC S-15 Questions & Answers

. No they are not . It indicates that the distributor shaft is either bent or loose on the drive shaft. allowing the rotor button to touch the pins in the cap. It may also indicate that the mechanical advance is failing.

My GMC S15 idles high and when you put it in drive it jump's forwards?

Replace both the front brake hoses, as these can perish and collaps on the interior allowing high pressure to go through but not allowing pressure to return and so the brakes lock up

check for a faulty / blocked accelerator pump /circuit as this fits the lack of fuel squirt on acceleration description. Also check the timing of the ignition.

I TINK IS AT THE FIRE WALL ON DRIVER SIDE NEAR BOOSTER

Water pump is, going or gone out. Best make sure the water is replaced daily if your going to drive it. Or the headgaskets next, & the trucks done. Make sure the water is IN THE RADIATOR" not just the overflow or reservoir container. Ive only had 1 stop leak, help get me {in emergency} from point A to B, but it didnt last long. Thats the powdered aluminum silicate? in a small 3- 4 inch tube. $1.99? You add it to hot water, & add to radiator.

Check possible ignition coil arcing to ground or possible distributor pickup coil or module.

This sounds like an ignition problem. Check the ignition coil. Low spark voltage can cause this. As well, the amplifier module in the HEI distributer could be at fault.

You might have some compression issues from bad piston rings or worn valves. Could have a leaky vacuum hose or intake. Throttle body or carburetor may be dirty as well. Check the Map sensor. Hope this gives you some good ideas.

Check the ground wire that comes off the negative terminal that hooks to the core support right by the front headlight and battery. mine did something similar

I just had to do this. The filter is inside the fuel inlet on the carb. the steel line comes up alongside the block to the back of the carb. unscrew it and the filter is right there. hope this helped

Clutch Plate Installed Backward , Or The Slave Cylinder Not Working

right side at oil pan where transmission connects to block

Sound like the engine jumped time.