Toyota Corolla

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Originally Posted by ambition

My falcon had a problem exactly as you describe.

What was happening was the MAP sensor was not functioning and the engine was thinking that the car was running too lean so it would tip in more fuel, then the o2 sensor was saying it was running too rich so it'd back off on the fuel after a couple of seconds.

Maybe I have it the other way around, but you get the point. Two components with differing opinions about the fuel air mix. One was wrong.

Check if you have a vacuum hose loose as well.

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Thanks mate, i will check the hoses. Did a new map sensor sort the Falcon? Is it an easy job to replace one?