crx si zc poping when press on gas

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dmok

New Member
The crx pop when I press on the gas pedal a little hard but it do not pop when i slightly the gas pedal. Will as it rev up from 1000 to 3000 u hear pop noise continous but once over 4000 it stop. I have no idea wat it is but I'm thing vaccum or running ot rich.
 
is the ZC SOHC or DOHC?
is this a new swap or has the engine been running o.k. and then just started to act up?
 
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