I recently did a h22 swap on my 93 prelude the h22 that i purchesed was obd2 and my chasie was obd1 so after some converting its all obd1... now for the problem when i start it starts right up but the rpms bunce and fluctuate between 800-1200 at idle and when i put it in gear and give it gas they do it all the way till the rpms get in the 2-3k range. its throwing check engines for my map and iavc so i changed my map sensor and cleaned the iavc and im still having the same problem... anyone know what the problem could be?? anything helps im out of ideas

 

did you check all your vaccum lines on the intak manifold???

 

im pretty shure they are all correct i looked online and in the stickys but my maniold dosent look like the normal h22a one ill put pics on later to show you what im talking about

 

I had a simialar problem some idle control sensor possibly

 

It could be the fast idle valve coming unscrewed. It's attached to the bottom of the throttle body