Rebuilt motor not firing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

looney · 04-08-2013, 03:47 PM

Any ideas would be helpful. Rebuilt 350, set it on frame, new plugs,wires,distributor,points etc. I get 12v out of coil wire but nothing out of the plug wires so voltage seems to be getting to the points, not sure where to check now.

Tinkermc · 04-08-2013, 03:53 PM

spark, fire gas is all u need but spark is very important at spark plug

Longhorn 70 · 04-08-2013, 03:54 PM

do you get spark out of the coil when ground side is connected then disconnected?

cdowns · 04-08-2013, 04:53 PM

have you set the point gap and dwell?

**truckster** · 04-08-2013, 05:14 PM

First place to check is to make sure the points are opening. If I remember correctly (it's been a long time) the points gap should be about .019 when the top of the lobe is in contact.

That should get you in the ballpark.

PanelDeland · 04-08-2013, 09:51 PM

Check the rotor.I've forgotten it and had a day or 2 looking for a problem that I created.

luvbowties · 04-09-2013, 05:48 AM

Quote:

Originally Posted by looney

Any ideas would be helpful. Rebuilt 350, set it on frame, new plugs,wires,distributor,points etc. I get 12v out of coil wire but nothing out of the plug wires so voltage seems to be getting to the points, not sure where to check now.

Since you have points, you got a condensor too. I used to tune-up cars for a business, and ran into 3 bad condensors in all the cars I experienced. One of them was a used one. The other TWO were NEW ones! Don't overlook it! Seems like today's uni-points--points and condensor mtd. together--seem to give more problems re: quality control than they used to when individual components!
Sam

04-08-2013, 03:47 PM	#1
looney Registered User Join Date: Aug 2012 Location: Mt.Sterling Ky Posts: 31	Rebuilt motor not firing Any ideas would be helpful. Rebuilt 350, set it on frame, new plugs,wires,distributor,points etc. I get 12v out of coil wire but nothing out of the plug wires so voltage seems to be getting to the points, not sure where to check now.

04-08-2013, 03:53 PM	#2
Tinkermc Registered User Join Date: Jul 2011 Location: Farmville, Va Posts: 3,026	Re: Rebuilt motor not firing spark, fire gas is all u need but spark is very important at spark plug

04-08-2013, 03:54 PM	#3
Longhorn 70 Registered User Join Date: Dec 2012 Location: Chandler AZ Posts: 1,149	Re: Rebuilt motor not firing do you get spark out of the coil when ground side is connected then disconnected? __________________ 1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9

04-08-2013, 04:53 PM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Rebuilt motor not firing have you set the point gap and dwell? __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

04-08-2013, 05:14 PM	#5
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,882	Re: Rebuilt motor not firing First place to check is to make sure the points are opening. If I remember correctly (it's been a long time) the points gap should be about .019 when the top of the lobe is in contact. That should get you in the ballpark.

04-08-2013, 09:51 PM	#6
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Rebuilt motor not firing Check the rotor.I've forgotten it and had a day or 2 looking for a problem that I created. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"



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