Acts like floating points... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70Custom10Nut · 12-18-2010, 12:55 PM

Would a faltering coil cause a symtem like floating points? About ten years ago I put a Mallory Electronic conversion in my distro to replace the dual points I had. Everything worked great. (forward to present after the truck sat in storage for 5 years while I was stationed in Germany) I replaced my battery, plugs, wires, and even the Carb (just cause the ol' Carter was done). Still I get a variation when running at steady speed whether its a idle or hiway speed. It'll drop about 200 rpm just for an instant, and then run normal for about 20-30 seconds. Starting is no problem and the same with acceleration. The only two things it could be would be the coil or the distro. Anybody got any insight?

Willys47 · 12-18-2010, 01:03 PM

don't over look that it could be a fuel miss , a carb could cause a falt like this as well. good luck

12-18-2010, 12:55 PM	#1
70Custom10Nut Registered User Join Date: Sep 2007 Location: Vilseck Germany (currently) Posts: 317	Acts like floating points... Would a faltering coil cause a symtem like floating points? About ten years ago I put a Mallory Electronic conversion in my distro to replace the dual points I had. Everything worked great. (forward to present after the truck sat in storage for 5 years while I was stationed in Germany) I replaced my battery, plugs, wires, and even the Carb (just cause the ol' Carter was done). Still I get a variation when running at steady speed whether its a idle or hiway speed. It'll drop about 200 rpm just for an instant, and then run normal for about 20-30 seconds. Starting is no problem and the same with acceleration. The only two things it could be would be the coil or the distro. Anybody got any insight?

12-18-2010, 01:03 PM	#2
Willys47 Registered User Join Date: Dec 2007 Location: Nanaimo B.C. Posts: 604	Re: Acts like floating points... don't over look that it could be a fuel miss , a carb could cause a falt like this as well. good luck __________________ I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! Last edited by Willys47; 12-18-2010 at 01:03 PM.

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