Drivability Concern

[Steve Rinaldo]

I have a 1930 tudor and the only modification is a Brumfield head. The last few times I drove the car It seems to run fine when first driving. If I stop for 15-20 min. the car has a bad midrange miss. I've rechecked timing, point gap and even swapped carbs with no change. When it was hot I checked spark intensity with the Nu-Rex tool and have a really strong coil spark. I am running out of ideas. I was going to swap the condensor next. Any other things I should look for. Thanks, Steve

 

[Tom Wesenberg]

Ethanol in the gas causes those kind of problems.

 

[Gary WA]

Stabil makes an additive for ethanol try it. Just thinking?? or 4oz of Marvel Mystery Oil for ten gallons of fuel.

 

[Patrick L.]

Does the 'miss' stay or does it go away after awhile ??

 

[Steve Rinaldo]

It seems to stay

 

[Dave in Boise]

plugs too hot and causing predetonation once warmed up?

Just thinkin..

 

[Downeaster]

Sticking Valves, try the mystery oil in the gas.