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Strange hesitation problem

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I have recently gotten a CEL light with code 1128 only. Yesterday I received a check engine light with both codes 1128 and 1130 which many suggest may be due to a dirty MAF. The car for the most part runs pretty well once warmed up but there is a definate hesitation/stumble when the car is warming up and you apply any amount of gas. The stumbling is typically right past idle up to about 1200 rpms or so. After that it smooths out. I realized today that the stumbling is only when the clutch is pressed in. Without the clutch depressed the idle is just fine and you can gently rev the engine with no problems...press in the clutch and rev the engine and it stumbles alot. This makes backing out/pulling away initially very difficult unless the car has idled for about five minutes. Any ideas? The car is a 2000 2.7 with about 52k miles.

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