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I have a v6 1985 gmc s15 sierra it turns over strong but wont crank

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  • Dylan Young
    Dylan Young Dec 21, 2016

    Today it fired right up with no problems

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Fuel pump problems

Posted on Dec 21, 2016

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I'm a little confused when you say "it doesn't crank" do you mean it cranks but won't start? If so check you ignition system... spark plug wires, distributor, or relay for spark. If that is sparking then it's a fuel problem. Check your carb or fuel injector whichever applies. Being a older vehicle fuel pump could be the culprit.

Posted on Dec 21, 2016

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  • GMC Master
  • 11,086 Answers

No, it cranks over strong but won't start an run is the right way to state that. Now then , did you check for spark , fuel pressure ? No Start Diagnostic Basics EricTheCarGuy

Posted on Dec 21, 2016

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: spinning will not crank

It's fairly common for the pickups in distributors to go bad.

Posted on Jul 03, 2009

  • 16 Answers

SOURCE: 1998 GMC SIErra

Check your transmission. Look underneath the truck and see if you see moisture around the transmission pan. If you see any indication of that, you may have a huge issue on your hands. Your reverse gear is seized to the Drive Gear. However hopefully it's something like needing a new clutch or a clutch adjustment

Posted on Aug 23, 2009

  • 811 Answers

SOURCE: my 2000 gmc just shut off while driving

check fuel pump relay, is fuel present at motor 

Posted on Sep 15, 2009

ZJLimited
  • 17970 Answers

SOURCE: firing order for a 1986 gmc s15

FIRING ORDERS

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.

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Fig. 1: 1.9L engine . Firing order: 1-3-4-2 . Distributor rotation: counterclockwise

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Fig. 2: 2.0L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise

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Fig. 3: 2.5L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise

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Fig. 4: 2.8L engine . Firing order: 1-2-3-4-5-6 . Distributor rotation: clockwise

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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

  • 1 Answer

SOURCE: 2006 gmc sierra 1500 stalled and will not start.

i have a 06 sierra that done the same thing and it was the distributer gear stripped

Posted on Dec 08, 2009

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