what up ht. I have a 91 CRX Si which i finished my swap on. its an ls/v with P30 pistons and an OBD1 conversion. I have everything pretty much all set accept for VTEC and a minor problem accelerating. in any gear, which moving from a stop or changing gears 1k-3k the car will buck back and forth, I have to stay on the clutch and hold the idle past 3k to get it to drive smooth. it has a cable B16 trans not sure if it makes a differece. any suggestions???

 

just fixed my brothers b18c5 was doing same thing and idleing rough!
so we went to the junkyard and snagged a Idle air control valve off a 95 civic dx (yes itll fit) and it runs and idles like a dream.

 

thanks bro, gona have to hit the bone yard this weekend

 

best of luck

 

and also make sure you have 0 vacuum leaks and coolant level is full. free things to do before spending money on an iac

 

^agreed

soapy water fixes many problems

 

If so get a bottle of brake cleaner,carb cleaner,chocke cleaner,maf cleaner and spray it around manifold vaccum lines it idle changes were you spray it then you hae a leak but ive never seen a honda/acura with vaccum leaks causing idle surge. usually the rpms shoot up.

 

cracked vacuum hoses can do it. throws the map sensor and the iac valve off

 

Sure it can but till date i havent seen it once.

 

ive fixed it a few times on a couple differant cars, not just hondas, just figured it was a free thing to look at. but ive worked on some pretty nasty piles and seen some pretty f'd up things. best to go back to basics sometimes

but on the other had i have a pile of iac's and its only a min to change in out in a pinch to find out

 

[QUOTE=10psiLsEf2 but ive never seen a honda/acura with vaccum leaks causing idle surge. usually the rpms shoot up.[/QUOTE]

Like i said