We recently swapped a 98 gsr motor with a b16 head (w/gsr cams & throttle body) into my 92 cx hatch. Everythng is fine but everytime I hit vtec the check engine light comes on....it's code 21 which is vtec spool solenoid i believe. Well we're still using the obd1 p-72 and we looked in the haynes manual and it says " code 21 vtec spool solenoid (gsr only) So im guessing since i put the b16 head on it it's just not there...and the ECU isnt getting any signal. Anyway is this something I should fix or is it alright. Once the car is cut off and i restart the CEL isnt on until i hit v-tec...i could drive all day and shift at like 4 grand and the CEL never come on. Anyway we also changed vtec solenoid to make sure it wasnt that. Thanks for any help.


Drew

 

the 12:57pm bump