Vacuum leak only when engine is “cold”?

I have a 361 with a weiand 8008 aluminum intake manifold. I have checked my brake booster for leaks, even disconnected every vacuum line from the carb and plugged them. I seem to have a vacuum leak i cannot find still but only when the engine is relatively cold.

Stone cold, start the engine, let it run for 30 seconds, put in drive theres a good chance it stalls immediately, afr goes to 20+. The warmer the engine gets the less severe the issue. Once the engine is up to temp and the...

Read more
Author: MericaMopar