just bought this car and first of all i have swapped out IAC and that other valve next to IAC i have also done a coolant flush and bled it it out. on a cold start car will idle fine.. after it gets to operating temp im getting the dreaded 1-2k rpm fluxuations. i have a bad coolant sensor that i know of, not sure if that could be causing it. my intake gaskets are good. whats teh fix for this issue? today the idle issue seems to have fixed itself for a few hours than came back on my way home from work. i bought this car as a DD only... its completely stock other than open cone slapped on TB and an obnoxiosly loud fart cannon thats gotta go bye bye. i despise fart cans. what other things should i be lookin at to cause my probs. thanks in advance.

 

also.. im looking for the introduction thread and dont seem to have one here.. if there is can someone plz link me. thanks.

 

check out this thread

https://honda-tech.com/forums/honda-prelude-4/end-all-idle-surge-bounce-etc-problems-thread-1979500/

 

thanks for the link man, sorry i didnt read around first and find that but i was in a hurry... i did a smoke test on it today and saw smoke coming from FITV.. rtv'd that beeeotch and it helped a lil.. so a buddy of mine "ASE" messed with the timing and got it to idle at 1100ish.. ill still probably replace IAC and FITV soon... but im happy for now with 1100 rpm idle. surging is GONE. still cant find intro section. do u guys have one here.. this setup is totally different than my grand prix site.