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-   -   Gmc v6 ignition problem (https://67-72chevytrucks.com/vboard/showthread.php?t=750145)

Sick5 11-09-2017 10:58 AM

Gmc v6 ignition problem
 
Buddy of mine is having spark problem and im trying to fig out how to solve his issue. No spark. V6 points. I started with the coil it has 12 volts going in. I turn the truck over and no spark at the plug. Replaced the coil and still no spark. Is there amything else i sshould be Looking at.

WorkinLonghorn 11-09-2017 11:07 AM

Re: Gmc v6 ignition problem
 
Replace the points and condenser. Set the dwell to spec.

Sick5 11-09-2017 11:16 AM

Re: Gmc v6 ignition problem
 
condenser is that round thing in the cap with a wire going to the points.?

Sick5 11-09-2017 11:17 AM

Re: Gmc v6 ignition problem
 
what happens if I still don't get any spark?

Irishbleueyes 11-09-2017 11:31 AM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by Sick5 (Post 8078658)
what happens if I still don't get any spark?

There should be a ballast resistor wire that limits the voltage to about 9 volts. 12v into the coil damages the condenser and points. If there is still no spark after all parts are replaced correctly then the distributor is internally grounding somehow. Then you swap out the distributor for another. You need to get a service manual that guides you through trouble shoots. Or do more research online. There is another site you can also post for help. Jollys gmc guy site http://6066gmcclub.com/index.php

Sick5 11-09-2017 11:59 AM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by Irishbleueyes (Post 8078669)
There should be a ballast resistor wire that limits the voltage to about 9 volts. 12v into the coil damages the condenser and points. If there is still no spark after all parts are replaced correctly then the distributor is internally grounding somehow. Then you swap out the distributor for another. You need to get a service manual that guides you through trouble shoots. Or do more research online. There is another site you can also post for help. Jollys gmc guy site http://6066gmcclub.com/index.php


I checked the incoming power to the coil and that 11 to 12 volts. is their a resister on the wire from the ignition switch?

The Rocknrod 11-09-2017 12:30 PM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by Irishbleueyes (Post 8078669)
There should be a ballast resistor wire that limits the voltage to about 9 volts. 12v into the coil damages the condenser and points. If there is still no spark after all parts are replaced correctly then the distributor is internally grounding somehow. Then you swap out the distributor for another. You need to get a service manual that guides you through trouble shoots. Or do more research online. There is another site you can also post for help. Jollys gmc guy site http://6066gmcclub.com/index.php

Quote:

Originally Posted by Sick5 (Post 8078688)
I checked the incoming power to the coil and that 11 to 12 volts. is their a resister on the wire from the ignition switch?

See anything like this on the firewall?:
http://www.northernautoparts.com/Ima...s/ph_28483.jpg

jchav62 11-09-2017 12:40 PM

Re: Gmc v6 ignition problem
 
Make sure the points are adjusted correctly. Around .017", I believe?

Sick5 11-09-2017 01:10 PM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by The Rocknrod (Post 8078716)
See anything like this on the firewall?:
http://www.northernautoparts.com/Ima...s/ph_28483.jpg

this is before the coil correct and if this is damaged I wouldn't get any power to my coil?

The Rocknrod 11-09-2017 01:35 PM

Re: Gmc v6 ignition problem
 
;)

Sick5 11-09-2017 01:39 PM

Re: Gmc v6 ignition problem
 
Standard troubleshooting procedure:

Take off the distributor cap so you can see the points. Turn on the ignition switch and rotate the engine by hand until the points are open. Now use a multimeter or test lamp to check for power at both the (+) and (-) terminals of the coil. If no power on either one, you have a break somewhere between the coil and the switch. Work backward toward the switch, checking at each point where there is a terminal or connection until you find the break.

If you have power at (+) but not at (-), disconnect the lead going to the distributor. If you have power at (-) now, you have a short to ground somewhere in the distributor or the connecting wire. If you still have no power at (-) with the lead disconnected, you have an open coil primary, but this is VERY rare.

If power at both (+) and (-), turn the engine by hand until the points are closed. Now you want to see power at (+), but not at (-). If you still see power at both terminals, you have a break between the coil and the distributor, or else the points aren't making contact.

jbgroby 11-09-2017 03:08 PM

Re: Gmc v6 ignition problem
 
For about $75.00 you can change out all the internal components with Petronix Electronic Ignition, I did mine 6 years back and have not had any problems with it.

Sick5 11-09-2017 03:34 PM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by jbgroby (Post 8078835)
For about $75.00 you can change out all the internal components with Petronix Electronic Ignition, I did mine 6 years back and have not had any problems with it.

I would if it was something i get locally. I meed to get it running asap

jbgroby 11-09-2017 04:17 PM

Re: Gmc v6 ignition problem
 
call NAPA or ORielles you can go and order it from their website as well.

Sick5 11-09-2017 11:14 PM

Re: Gmc v6 ignition problem
 
Ok i pulled the dizzy out cleaned it and put it back. Started fine. Went for a ride drove a block away and shut off.. wouldnt start till 5 min of sitting

Irishbleueyes 11-09-2017 11:18 PM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by Sick5 (Post 8079087)
Ok i pulled the dizzy out cleaned it and put it back. Started fine. Went for a ride drove a block away and shut off.. wouldnt start till 5 min of sitting

Ya sounds like you need a new distributor... unless your not getting fuel.?.?.?

Sick5 11-09-2017 11:53 PM

Re: Gmc v6 ignition problem
 
Yeah im getting fuel.. what would cause that?

Sick5 11-09-2017 11:55 PM

Re: Gmc v6 ignition problem
 
Do tgis dizzy have a pick up?

Irishbleueyes 11-09-2017 11:56 PM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by Sick5 (Post 8079128)
Yeah im getting fuel.. what would cause that?

When it fails, you need to immediately check and see if you still have power to the coil. To rule out bad ignition switch. Could be broken wire inside dizzy..

Sick5 11-10-2017 12:27 AM

Re: Gmc v6 ignition problem
 
So.maybe the wire that goes from the coil to the inside of the Distributor

Irishbleueyes 11-10-2017 08:33 PM

Re: Gmc v6 ignition problem
 
Quote:

Originally Posted by Sick5 (Post 8079163)
So.maybe the wire that goes from the coil to the inside of the Distributor

Could be the condenser, even the new ones fail. Make sure its made in USA..


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