drtbiker4lyf

Im pretty new to the honda scene. Ive always been into imports and such but never been big into swaps and such. Well recently I picked up a 91 CRX Si with a B20b and a B16a head. DOHC Vtec. The motor and internals are in great shape. It only has about 5k on the rebuild as it sits now. But the issue im having is in lower rpms or even under steady acceleration its bogs kinda and spits and sputters. It never cuts out or dies it just kicks and spits. Under heavy acceleration it does just fine for the most part. I replaced the plugs and wires but thaat helped none. So im thinking maybee the injectors are to small? Any help would be great. Below is a list of mods to the vehicle to possibly aid?

-OBD1
-Chipped P28
-Hytech headers
-full exhaust, including hi flow cat
-Stage 2 clutch
-8LB flywheel
-Skunk2 intake manifold
-NGK plugs and wires
-stock LS tranny (not a mod but included to help possibly aid)
-Thats it that I can think of. Nothing to heavy or extensive at the moment

boredom

b20s are shitty motors in my opinion, but if you are running stock injectors, thats more than likely your problem. you should have plenty of low end tq, so your problem is going to be either fuel, spark, or air. my guess is there is a short ram on the car since there is a s2 IM. timing could be off, and you could also have a bad dizzy. b20v's need to be tuned, but anymore info about the car?

drtbiker4lyf

Right now there is no intake or even filter on for that matter. Just been kinda tinkering with it really. Im thinking its most likely my injectors but possibly afr?

boredom

what makes you consider a bad afr? still leads back to a fuel problem. who assembled the motor?

BREWSKI

if you have stock injectors yeah scrap em and upgrade to rc or even dsm ones

drtbiker4lyf

The guy I bought it from. Hes a mechanic at some auto shop. But then again you can never really fully trust someone elses work unless you know/ trust them. Overall the swap looks to be done really well and clean though. I took it to my mechanic to check it over first and he said injectors aswell. I just wanted another opinion ya know. What do you think it could be as far as fuel then? And what would the fix be?

BREWSKI

http://www.honda-tech.com/showthread.php?t=1676914


^possibly your best friend

boredom

not enough fuel going to the motor. maybe a bad fuel pump, but that should have been upgraded when the previous owner went b20v. i would look into atleast some 440-450 cc injectors, its always better to have more fuel than not enough. i mean, you could always get some 310s, but injectors will always hold you back.

BREWSKI

and obviously what ever set up you go with please tune it

TITS

change spark plugs