I have alot of questions so this is one of many I have a 1989 crx si with a b20z2 motor and a b16 tranny the motor while idling revs up and down it pulls it air in the intake while it does this any knowledge on why it does this?

Asked by Apr 15, 2013 at 12:08 AM about the 1989 Honda Civic CRX 2 Dr Si Hatchback

Question type: Maintenance & Repair

2 Answers

Yes. Check ALL your smog devices. One of them is not behaving properly.

1 of 1 people found this helpful.

idle air control valve is dirty or the coolant lines in ur throttle body are clogged

2 of 2 people found this helpful.

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