boging @4000rpm

man-of-war

Petty Officer 2nd Class
Joined
Apr 23, 2004
Messages
175
hi all my 454 gm1975 7.5l bogs @4000rpm then snaps out of it the boging last for around 2 seconds then it's fine.is this a gas or an electrical problem?how do i check the sparkplug wires [the safe way] for a spark?
 
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