Question about 1986 GMC S-15
Posted by Anonymous on
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.
Posted on Apr 17, 2015
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Posted on Jan 02, 2017
SOURCE: wont stay runnin
It sounds like the same problem I have on occasion with my 1994 GMC Safari van. You need to check your AIC valve ( air intake control) it may be bottomed out wich is the reason it starts but will not stay running. Now I also have another possilbe solution ckeck to see if your catlist converter is not plugged . Not shure why but these are some of the solutions that I have for what happenes to my van . Hope this info can be of some help.
Posted on May 02, 2009
Sounds like it only runs on starter fluid.sort of. Mine is an 84 with a carb. You may have a bad fuel injector or dirty at best. Have your checked for good spark or dist rotor pointing to #1 in dist cap at TDC. The timing chain may have worn and jumped a couple of teeth
Posted on Sep 26, 2009
SOURCE: firing order for a 1986 gmc s15
To avoid confusion, ALWAYS replace spark plug wires one at a time.
The most important thing to remember about the removal and installation of a distributor, cap or spark plug cable is that all wires MUST be labelled before they are disconnected. Keep in mind that these figures depict a firing order where the distributor cap terminals are relative to EACH OTHER only and they do not necessarily depict the tower positions in relation to the rest of the engine. This is true because any distributor which has been removed and reinstalled may have been installed with the No. 1 spark plug tower at any position (360 degrees) in relation to the rest of the motor, as long as the rotor aligned to the No. 1 tower when the No. 1 cylinder was at TDC of the compression stroke (valves closed, ready for the plug to fire). As long as the remaining wires were connected in the correct firing order sequence (depending on direction of distributor rotation) the engine will run. DO NOT EVER remove more than one wire from the distributor cap at a time unless you tag ALL wires and towers to assure proper installation.
Fig. 1: 1.9L engine . Firing order: 1-3-4-2 . Distributor rotation: counterclockwise
Fig. 2: 2.0L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise
Fig. 3: 2.5L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise
Fig. 4: 2.8L engine . Firing order: 1-2-3-4-5-6 . Distributor rotation: clockwise
Fig. 5: 4.3L engine. Firing order: 1-6-5-4-3-2 . Distributor rotation: clockwise
I hope help you with this (remember rated this help) Good luck.
Posted on Oct 05, 2009
You'll need a bench vice for this. A few sockets help as well. Once you get the shaft off the truck, put a smaller diameter socket on one side and a much larger diameter socket on the other and sandwich in a vice. Compress vice to drive the U-Joint through shaft (smaller socket will drive the one side through the other with the much larger socket). Installation is the reverse of removal.
Posted on Aug 02, 2010
SOURCE: 1989 gmc s15 starts then dies
you need to check the battery cables and clean them and clean them, or it could be the coil needs replaceing or there might be a fuse blowed somewhere.
Posted on Mar 17, 2012
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