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Posted on Dec 12, 2010
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My 1986 gmc turns over but wont start - 2003 GMC Sierra 1500

1 Answer

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  • Master 480 Answers
  • Posted on Dec 12, 2010
Anonymous
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Joined: Oct 02, 2010
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Make sure it has gas going to the carb or injecters then if you have gas check to see if you have a spark it dont matter if you check for spark at the #1 wire just as long as there is a spark.

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1answer

What is the correct amperage to ignition switch on 88 gmc k1500

Do you have 12 volts at the large post and at the small wire coming from the key switch when the starter will not turn ?
There is a neutral safety switch in the circuit that could have failed.
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Have a 1986 GMC S15 6cyl that at tmes will not do anything when I turn the key over and other times it starts right up. What could be the problem?

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.
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Hi guys i have a 1986 gmc s15 it cranks but wont start and now it **** fireing plz help

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.
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1986 C2500 GMC 6.2l diesel with dual fuel tanks wont supply fuel to the fuel filter

Can only be a couple of things. Electric fuel pump is not functioning correctly, the electric switch is stuck between tanks, or you have a blocked line.
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Firing order diagram for 1986 GMC S15 2.8L

For this models:
1986 GMC S15/T15 4WD P/U 2.8 liter V-6 VIN "R"
1986 GMC S15/T15 4WD Jimmy 2.8 liter V-6 VIN "R"
1986 GMC S15/T15 2WD P/U 2.8 liter V-6 VIN "R"
1986 GMC S15/T15 2WD Jimmy 2.8 liter V-6 VIN "R"

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Hope helped woth this. Remember rated this help. Good luck.
1helpful
1answer

When I try to start my 1986 GMC Classic Sierra 1500 the starter sometimes grinds against the teeth of the motor , I had to change last starter because its top shield was shattering. Could someone help me?

Yes your problem because you have changed the starter then you have 6 bad 1/2 worn teeth on the FLYwheel and the only way to fix your problem is to either remove the engine OR gear box and remove the flywheel and have a new starter ring fitted to flywheel and refit what was removed and away you go finished ...
THEother way to start every time till you do it is to HAND brake off put in 1st gear and turn engine over 1/2 a turn ,and then it will start every time, as the engine will stop the same place every time so thats were the 6 worn teeth are. Have a goodday
Let me know hoe you get on Ron
ARE you on Skype
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My dads 1986 Gmc Safari want start

Take off your gas cap and have someone stand there with thier ear at the hole, (no smoking), turn the key to on just before start and they should hear the fuel pump humming. if they dont then try to start. if it doesnt start turn key off and at that instant the pump should be heard again. What i think is happening is your pump is not energizing . Its supposed to energize when turning your key on and off. This can be caused by a bad fuel pump or pump relay switch. Hope this helps. please rate me
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1986 GMC Jimmy fuel problem

is the muffler sound quieter if so it is the converter stopup
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