Not Getting Enough Voltage - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BiltByMe · 06-22-2018, 01:19 AM

I've run into a problem on my '70 GMC k2500 that is really boggling me. I swapped out the original 350 with points style distributor to a brand new crate motor modeled after a '78 with the HEI distributor. I currently have the Holley Msd Street fire distributor in it and I have bypassed the original ballast wire that was factory on the '70 trucks. I have a miss that is really only noticeable at around 2500 rpm that is random in how it misses. I also have a new alternator, new battery, and new voltage regulator but I'm only getting 12.5 volts at the battery when the truck is running. Everything under the hood is pretty much new so I'm confused as to why it's running so poorly. Any suggestions?

06-22-2018, 01:19 AM	#1
BiltByMe Registered User Join Date: Aug 2016 Location: Kansas City, Kansas Posts: 15	Not Getting Enough Voltage I've run into a problem on my '70 GMC k2500 that is really boggling me. I swapped out the original 350 with points style distributor to a brand new crate motor modeled after a '78 with the HEI distributor. I currently have the Holley Msd Street fire distributor in it and I have bypassed the original ballast wire that was factory on the '70 trucks. I have a miss that is really only noticeable at around 2500 rpm that is random in how it misses. I also have a new alternator, new battery, and new voltage regulator but I'm only getting 12.5 volts at the battery when the truck is running. Everything under the hood is pretty much new so I'm confused as to why it's running so poorly. Any suggestions?



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