surging

Any one ever have a problem with a 97 es300 surging at idle? A foul odor from the exhaust tipped me it was running rich. With a snap-on scanner hooked up the mass air flow sencor was reading higher voltage than at normal idle, while the 02 sencor was reading lower. first thought was an inaccorate

02 sencor but the dealer insisted they have had alot of problems with iac motors, but after I replaced it the car still acted up. The problem only happens after extened criusing. Any help would be appreciated. Ken
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Ken
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I have a 92 ES300 that does this. It must be the computer trying to ensure the engine doesn't stall, or something. When I first got the car, it used to catch me off guard. Now I've gotten into the habit of keeping my foot on the brake pedal a little harder.

CB

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Cloud Burst

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