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1990 idleing problems

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Old 03-11-11, 12:41 PM
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CT 1990 idleing problems
i have a 1990 gtu n/a and when i turn it on it starts right up but the rpms rise and fall from 1 to 2500 rpms like im reving it but i dont. someone told me it was the ecu?
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Old 03-11-11, 04:58 PM
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What do you mean? It's supposed to rev up to around 3000 for a bit and then fall around 1500 until it's warmed...
Are the revs oscillating?
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Old 03-11-11, 07:40 PM
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Sounds like a air leak somewhere.

Does it do this when the car is hot? or does it do it when the car is cold? or both cases?
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Old 03-11-11, 07:44 PM
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at all times
Its always doing it until it gets hot
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Old 03-11-11, 08:52 PM
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yes it revs up and down and up and down. is that normal for the rx7's?
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Old 03-12-11, 04:23 AM
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Yeha, I'd want to check to make sure all my grounds as well as my vacuum hoses... Possibly could be out of tune as well...
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