[Centerline]

I have a problem with hard/no starting after the engine has been run for about 30 minutes and has come up to temperature. This motor doesn't run hot and stays around 180-185 degrees even on hot days.

I originally thought it was a vapor lock problem but I checked the carbs (dual Carter AFB's) and they are spraying fuel. Then I hooked up a timing light and cranked the motor. There was no spark so obviously it's an ignition problem. I'm just not sure if it's the coil or distributor. I’m running a Mallory Unilite vacuum advance distributor and a normal high performance conventional coil.

Has anyone ever had the electronic module in a Unilight refuse to work when hot? I'm thinking that's the real problem and since I don't race this big block and it never sees 5 grand on the tack, I'm thinking of switching to a dual point setup that won't be bothered by the heat.

Any suggestions?

[Tom]

try a different coil,sometimes a coil will go out after it's run awhile,then start again after it cools.I have run the unilite a few times and found no problems. what you have described to me sounds like the coil

[FASTFORD]

i agree with Tom.i run a unilite also.i had 1 problem and had to replace the module inside the distributor.usually,when the module goes bad,it does not work at all. i strongly urge you install the power filter to avoid ruining the module. let us know what fixes your problem,good luck.