high idle

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10-05-2009, 04:29 PM

4uzindian

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high idle

1988 blazer 2.8L engine . 22o TBI carburator. it idle's at 1100 rpm. new air cleaner gasket. could it be the TPS? any advice on how to lower it would be appreciated.

10-05-2009, 08:23 PM

swartlkk

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Location: Waterloo, NY

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Replace your throttle body base gasket. These are known to go bad. While you have the throttle body loose, clean it up.

10-06-2009, 02:09 PM

4uzindian

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thank's for answer. is that where carb attaches to manifold?

10-06-2009, 05:05 PM

swartlkk

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Yes. Technically it is not a carb though.

10-07-2009, 02:19 PM

4uzindian

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thank's for answer. also can the ignition timing be adjusted on this engine or is it factory set. 2.8L - 220 TBI injector unit?

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