View Single Post
Old 02-27-2021, 08:23 AM   #15
JMFL36
Senior Member
 
JMFL36's Avatar
 
Join Date: Oct 2017
Location: Venice, FL
Posts: 226
Default Re: New misfire - sticky valves?

Thanks for all the advice, guys. Much appreciated. I ran several more compression tests and #7 is definitely the cause of the misfire. I got sporadic compression readings anywhere from 75 to 0 from #7, while all other cylinders reported consistently around 75. I also noticed my plugs, all of them, were somewhat black. So I am suspecting there is some carbon buildup on that exhaust valve stem. I need to lean the carb out once I get everything back together. But first my plan is to spray some brake clean through the plug holes around all the exhaust valves as wife cranks the motor. Then let it sit for a few hours and repeat until I get good compression out of #7. Then repeat one more time, but with MMO instead of brake clean this time. Sound like a reasonable plan?
__________________
Document your car with CollectorCarCompanion
JMFL36 is offline   Reply With Quote