Originally Posted by moe7404

if the cap has a vent hole. plug the vent with JB-weld. trust me. been doing for 3 years.

Originally Posted by h3lzsn1p3r

there cant be any moisture in the cap or it wont fire

Originally Posted by moe7404

the vent lets moisture into the cap. it took me 5 years to figure this out. the moisture gets inside just like it gets on your grass over nite when the air temps go up and down. i have been plugging this hole for only 3-4 years with no trouble in some climates its not a problem, but in Wichita KS it is. i think on dodge trucks with a small block having the cap next to the fire wall makes the trouble worse. or parking next to a house makes it worse. note you have more moisture next your house than in the middle if the driveway, in some cases. yes you can have
SOME moisture in the cap and it will run, but not very well.