Originally Posted by second 70
With it being both cars I'd guess gas. All gas even race gas can go bad.
Yes, the race gas is a few years old, but it's strange that a different ballast resistor will allow them to run... I'll put in fresh race fuel after removing the gas in them ....next spring. Plus, other cars I have still run fine on the same race gas...strange...maybe it's just a matter of time before it effects them also. I'll try fresh fuel, and new resistors.

Last edited by BH27G1B; 10/16/21 11:37 AM.