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Yesterday I was sitting at the light at the end of my drive when the idle pulsed from 500 RPM to 2000 RPM repeatedly. I reved it several times, but it would always pulsate when at idle. I turned the air conditioning on and it stabilized the idle, but at 2000 RPM. This occurred an hour lated when I took the car for a short drive, but I cannit get it to do it again. It seemed to have fixed itself, but I don't want it to come back. What could it have been?

99 996C2 6-speed Coupe 40K miles

Thanks for your help :renntech:

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Yesterday I was sitting at the light at the end of my drive when the idle pulsed from 500 RPM to 2000 RPM repeatedly. I reved it several times, but it would always pulsate when at idle. I turned the air conditioning on and it stabilized the idle, but at 2000 RPM. This occurred an hour lated when I took the car for a short drive, but I cannit get it to do it again. It seemed to have fixed itself, but I don't want it to come back. What could it have been?

99 996C2 6-speed Coupe 40K miles

Thanks for your help :renntech:

Try removing your idle control valve (left side of throttlebody) and clean it with carb spray.

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Yesterday I was sitting at the light at the end of my drive when the idle pulsed from 500 RPM to 2000 RPM repeatedly. I reved it several times, but it would always pulsate when at idle. I turned the air conditioning on and it stabilized the idle, but at 2000 RPM. This occurred an hour lated when I took the car for a short drive, but I cannit get it to do it again. It seemed to have fixed itself, but I don't want it to come back. What could it have been?

99 996C2 6-speed Coupe 40K miles

Thanks for your help :renntech:

Try removing your idle control valve (left side of throttlebody) and clean it with carb spray.

How do you access the idle control valve please. have the same issue after adding oil?

Thanks.

JC

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