Question about 1996 GMC Yukon

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I have a 98 gmc sierra with 5.7 it has gas pressure the coil is working but there is no spark after the distributor what should i chek

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  • Master
  • 1,198 Answers

First I would check the plug wire from the coil to the distributor. Distributor rotors can fail, some have a resistor. Does it have breaker points? Most motors use electronic sensors, which can fail, too.

Posted on Nov 27, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: I HAVE A 1991 GMC

If you are getting spark then it may be a fuel pump problem or fuel pump relay or inline fuse. Always start Fuel system troubleshooting by replacing the fuel filter or filters! You may be able to apply 12 volts from the battery (use a fused line) directly to the 12 volt side of the fuel pump and listen to see if the pump runs. Also may need to check that it is getting a good ground to the fuel pump. Then if the fuel pump does not run independently, replace the fuel pump. The fuel pump relay is computer controlled and several other things give the computer inputs which then controls the voltage to the fuel pump relay.

Posted on Jan 17, 2009

csmock132
  • 4669 Answers

SOURCE: 1997 gmc sierra 1500 5.7 vortec got spark got fuel

You said you have fuel pressure but what is it? It has to be 55 psi or it won't even try.

Posted on Mar 15, 2009

  • 1 Answer

SOURCE: 97 gmc sierra no fuel no spark replaced ign module

1996 GMC 1500 Pickup.
Replaced Coil, Dist cap/Rotor, Ign Mod & pick-up.
All showed to be bad with OHM meter.

20A ECM-B fuse keeps blowing out and I'm afraid to burn these new parts up....

ANY IDEAS OUT THERE???

Posted on May 19, 2009

Molson02536
  • 3854 Answers

SOURCE: 2004 GMC Sierra 4dr truck. the fan does not work

The switch or the wire harness at the blower motor has gone bad. The highest setting 5 has no resistor, so the blower runs on high but the high current flow ends up burning up the switch's contact on that setting or the resistor wire harness at the blower motor has gone bad. Common would be the switch it self, if the switch is good. Then it's going to be the wire leads at the speed resistor by the blower motor under the glove box by the passenger leg compartment. Keep me posted, be glad to help you get your Sierra running 100% again soon.

Posted on Jan 06, 2010

fixitriteman
  • 431 Answers

SOURCE: LOW OIL PRESSURE ON 2007 GMC SIERRA 1500. CHANGED

have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Posted on Mar 11, 2010

Testimonial: "thanks alot.truck is not making a rattling noise.we did check it with a manual gauge.it read about 10 at idol. press. gets better as you incr speed"

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My 2000 gmc sierra has no spark


you need to change the point distributor , but before that check the cable from coil to your distributor .

Apr 10, 2014 | 2005 GMC Sierra

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My 98 gmc 1500 V8 5.0l won't start. Has good spark


Spray starting fluid into the air intake of the engine, if it starts and you have fuel pressure you have no injection or injector pulse as we call it. Check ECM fuse one and two for continuity if it starts with fluid..

May 25, 2012 | 1998 GMC Sierra

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1994 gmc pickup turns over wont start fuel pump replaced 1yr ago plugs,rotor cap,distributor cap and plug wires replaced yesterday still wont start


Do you have a little screw driver? there is a fuel pressure test port take the cap out now be carefull when you do this crank it and at the same time press the shrader does gas come out like alotnot just a little but alot if it does then the fuel pump works now if it dribbles then your fuel pump failed,Okay if the fuel pump works the only thing that is left is the coil and ignition control module, before you decide to do the module or the coil the number on reason for it not to start is connection to the coil I see this all the time go to the coil connection and have some one crank it while you wiggle it and see if it start then.now if it still doesnt start youll just have to test for spark and if there is no spark your best solution is to replace the whole distributor why because there is a relector that has always failed even when it gives spark. and fuel because as a timed unit it gave fuel and spark at the wrong time here use the picture included in #1 wiggle connection #2 check for sparkcansmo_0.png

Apr 24, 2011 | 1994 GMC Sierra

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I changed my spark plug wires and possibly have them connected wrong. Is there a schematic that I might follow in order to ensure they are connected correctly?


FIRING ORDERS NOTE: To avoid confusion, remove and tag the spark plug wires one at a time, for replacement. If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your book to reflect how your engine is wired. Fig. 1: 1988-95 4.3L Engines Firing Order: 1-6-5-4-3-2 Distributor Rotation: Clockwise 91022g01.gif
Fig. 2: 1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2 Distributor Rotation: Clockwise 91022g02.gif
Fig. 3: 1988-95 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2 Distributor Rotation: Clockwise 91022g03.gif
Fig. 3: 1996-98 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2 Distributor Rotation: Clockwise 91022g04.gif
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Sep 18, 2010 | 1991 GMC Sierra

2 Answers

OK 1997 gmc sierra 5.7liter 4x4 replaced coil and


Doesnt this engine use a crank position sensor? mounted on timing chain cover.I would check that first

Oct 17, 2009 | 1997 GMC Sierra

1 Answer

Have a 1993 gmc sierra. runs fine most of the time . but will just kill sometimes out of the blue. does not matter if it is warmed up or cold. when it dies will just turn over but not start. replaced spark...


When this truck dies,does it have spark,or fuel pressure?Check it for no spark,if it has no spark,replace the ignition module.These gm year models are bad to go out ,and the distributor pick up coil also.Replace the module first,if this does not help,replace the pick up coil.NOW ON A FUEL RELATED PROBLEMit could be fuel pump,fuel pump relay,or the pick up coil.The pick up coil pulses the injectors,and the spark.I hope this helps,if not let me know.

Sep 20, 2009 | 1993 GMC Sierra

2 Answers

It cranks but doent start


ignitioin module inside the distributor.

Jun 27, 2009 | 1995 GMC Sierra C1500

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In what order do yu arrange the plug wires on the distributor cap or a 1990 gmc 350


1-8-4-3-6-5-7-2 Distributor turns clockwise Number one should be in the 5 oclock position. You should be able to draw an imaginary straight line between the coil tower and number one tower on the cap and the number one spark plug.

May 15, 2009 | 1990 GMC Sierra

1 Answer

1996 gmc sierra not firing when weather is damp replaced distributor and cap rotorbutton


try changing the spark plugs and spark plug wires that may help...but first to be sure try following the ignition system from top to bottom...first try holding a spark plug wire half an inch away from your engine block and let somebody else try cranking the engine if you can't see a spark then try that with the wire connecting the coil with the distributor if there is still no spark than the coil needs to be changed

Apr 03, 2009 | 1996 GMC Sierra

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