zm engine hesitates when accelerating

[mig360m]

zm engine hesitates when accelerating in 3rd gear when its cold. when engine is warn up it stop. some info please.

[1Mazda323Fan]

Is the CEL/MIL on? Does it feel like the engine is stumbling, or more like the clutch is slipping? This only happens in 3rd?

[mig360m]

no cel. i change plugs, coilpack, spark plugs wires, cam sensor , clean EGR, MAF, TB. it only hesitates when the engine is cold

[1Mazda323Fan]

Manual or automatic? Start checking the vacuum lines under the hood, and it wouldn't hurt to make sure the IAC is clean. I doubt it's the IAC, but it never hurts to check.

[mig360m]

its a manual ,clutch 3 yrs old. will check the IAC