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High idle

Boxster02
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Boxster02 Member

Boxster02

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Lately my car has been idling at 1200 rpm when first started in the morning ( 40 degrees ambient temp, AC off ), it would idle at about 800 before. When warmed up, it idles fine, but I have noticed the RPM's about 200 rpm higher at given speeds. Example: At 75mph in 4th RPM would be 4K, now its 4200. Car is 02 Tip with 78K. Could oil be a factor? I know it has Mobil 1, not sure on the weight, but I know its not 0W-40 as recommended. :oops: BTW....NO CEL. Any thoughts???

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Glyn Member

Glyn

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Posted (edited)
Lately my car has been idling at 1200 rpm when first started in the morning ( 40 degrees ambient temp, AC off ), it would idle at about 800 before. When warmed up, it idles fine, but I have noticed the RPM's about 200 rpm higher at given speeds. Example: At 75mph in 4th RPM would be 4K, now its 4200. Car is 02 Tip with 78K. Could oil be a factor? I know it has Mobil 1, not sure on the weight, but I know its not 0W-40 as recommended. :oops: BTW....NO CEL. Any thoughts???

Revs cant change when in gear unless the torque converter is slipping and you would notice that,.........., therefore i suspect your tachometer is reading wrong.

Glyn

Edited by Glyn
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