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.

1985 GMC S-15 | Answered on Sep 11, 2017

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

1985 GMC S-15 | Answered on Feb 11, 2016

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

1985 GMC S-15 | Answered on Dec 24, 2014

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.

1985 GMC S-15 | Answered on Dec 24, 2014


1985 GMC S-15 | Answered on Sep 02, 2014

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.

1985 GMC S-15 | Answered on Apr 19, 2014

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.

1985 GMC S-15 | Answered on Jan 23, 2014

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.

1985 GMC S-15 | Answered on Jan 23, 2014

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

1985 GMC S-15 | Answered on Jan 23, 2014

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

1985 GMC S-15 | Answered on Jan 23, 2014

right side at oil pan where transmission connects to block

1985 GMC S-15 | Answered on Oct 21, 2013

Sound like the engine jumped time.

1985 GMC S-15 | Answered on Aug 15, 2013

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