I have a 93 lude and it had the h23a non vtec in it so I put a jdm h23 vtec swap. it has been a few months since that and am still having a few problems. I got a p28 chipped ecu in it. the first problem I am have in with the idling of the car where it keep goin up and down it not that bad but I don't want it to turn bad. and the second thing is that after I put the p28 ecu in the car fell like it got a lot of drag till it hits bout 5k rpms. me and my friends are sitting still on this. so if someone has had this problem or knows about this then please help me out

the FINAL idle problem thread!!!!!

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1995 Honda Prelude SE Turbo; 250whp, 275wtq @ 10psi Soldddd!!!
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have you gotten it tuned or just running on a chipped p28

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the guy that done it said that he was tuned for it

but the idling problem been there before I changed the ecu and I clean the IAC and that helped some so should I just get a new one?

is the coolant system properly bled ? if not the thermal valve in the tb will cause it to idle up and down ..

You need to get a tune. Every motor is different.

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If it is still have idle problems yes. Cleaning it will not always fix it, I have been through 2-3 used ones in mine lol. Also I have the same motor, same ecu from phearable ecu.net and it runs great with the basemap they provided. Not sure what your "drag problem" is but if it's a legit problem then a dyno tune will most likely not fix it.

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ill have to check on the cooling if not sure then ill bleed it. and ill check on ecu.net
so after I do them few things ill get back on and let yall know whats goin on