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Mazda RX-8 won’t accelerate

Posted: February 26th, 2026, 10:40 am
by johnn
Hi all! I recently rebuilt the engine, ported the housings, and slightly upgraded the apex seals because I’m planning to install a turbo in the future. But back to the issue. I put everything back together, and now the engine runs rough at idle, the idle is unstable, it is stuttering when I get to 5 Rpm and higher and it keeps cutting off on me.
by the way my spark plugs is new, battery is new, alternator is new, coil pack is in great condition.