Slightly Erratic Idle upon Cold Start

_rgk

Member
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01 Mazda Protege
Hi all.

01 Protege LX 2.0 used to rev right up to 2000 rpm on a cold start, then slowly, smoothly, and surely idle down to 750 as the car warmed up.

Recently, however, the idle has been a bit erratic. Going to 2000, then 1000, then 1500, and not very smooth. It's not terribly rough, and doesn't happen every time, but it is a change I noticed.

Should I be looking out for anything?

Warm idle is perfect at 650-750 rpm. Coil packs and wires were changed a few months ago.

Thanks!
 
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