The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Engine cuts out after driving 20 min, ideas?

**CC69Rat** · 05-03-2021, 04:50 AM

The module in the distributor is going bad. (Circled in blue) common problem with these distributors. Summit carries a replacement for it.

See where it says "Unilite" on the tag (red) ?

99% sure that's your problem. I would also look at the coul to see if its touching the intake on the bottom edge, it may be getting hot and cutting out. Or, the ballast resistor may be getting hot after 20 min and cutting out, causing further drop in voltage to the coil and explaining the cutting in / out or loss of spark completely.

After it cools off for a few min, does it start back up ?

05-03-2021, 04:50 AM	#23
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,205	Re: Engine cuts out after driving 20 min, ideas? The module in the distributor is going bad. (Circled in blue) common problem with these distributors. Summit carries a replacement for it. See where it says "Unilite" on the tag (red) ? 99% sure that's your problem. I would also look at the coul to see if its touching the intake on the bottom edge, it may be getting hot and cutting out. Or, the ballast resistor may be getting hot after 20 min and cutting out, causing further drop in voltage to the coil and explaining the cutting in / out or loss of spark completely. After it cools off for a few min, does it start back up ? Attached Images __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) Last edited by CC69Rat; 05-03-2021 at 05:10 AM.