It's a 22r.... carbie, we bumped the timing up a bit and the truck ran alot better. havent done the e-test since doing that. Can timing effect HC?
Also, there is no o2 sensor, there is a pipe welded in place of where the o2 sensor is in a normal truck, still havent found the wiring for it.....
oh also a full tuneup was just done on the truck...
I will get some more info later in the day, it's a friends truck...

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim