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Old 08-30-2007, 11:17 AM   #3 (permalink)
mcbear
Mgr., Marg. Mead Taproom
 
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Date registered: Apr 2004
Vehicle: 500Es
Location: The BlueGrass State
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Hi, welcome to the board. Go ahead and fill out your profile so we can know where you are from.

Regarding you Idle question, if you are in the US and the CATS are removed it is possible that they also removed the air pump. This will cause the computer to idle very high and rich at the start of a run cycle. If that is the case you most likely are not getting great gas mileage also.

If you are not US, I agree that vacuum is a likely culprit and is faking the computer out. Also check your O2 sensor that is sending information to the computer.
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| ------ 93 500E ---- | ---- 93 500E ---- | ---- 92 500E ---- | ---- 88 560SEC AMG ------|
| --- 2000 S500 --- | --- 92 300E Sportline --- | --- 80 280SL --- | --- 68 280SE Coupe --- |

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