Thread: 454 Missing and popping!

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Originally Posted by pat mccarthy

yep i said that on post#6 your going to want to check vacuum in gear with your foot on the brake and 1/2 of what you read on vacuum is what you want for a power valve of 4.5 that s how i done it .as for a miss could be fuel low psi or they never fail much i would be using a nother coil just to check the one you have

So i checked the power valve and it is a 4.5 and i used another coil, cap, and distributor, and changed the carb. Still the same problem, i took it to a mechanic tonight. Is 125 psi compression good for a big block with flat top pistons?

Originally Posted by 1987BBMonte

So i checked the power valve and it is a 4.5 and i used another coil, cap, and distributor, and changed the carb. Still the same problem, i took it to a mechanic tonight. Is 125 psi compression good for a big block with flat top pistons?

hey man what did u find out what problem was i am having same type of issues.