Dear Ron;

GM Dad is right.

Are you sure the spring is the same height & # of coils as the others?? I'm thinking it may be compressing completly "into solid"??

Your sure there NOT oversize pushrods??

Let's try switching one with another & cranking the engine W/O the plugs in.

Good luck. \:\)

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon