Hello everyone
i have a quick question kinda a concern
i have a 97 civic coupe with an LS/Vtec Engine
it runs smoothly n what not, but when i hit vtec in fifth gear (when im in the 110mph)
my check engine light always comes on
when i turn my car off and back on it goes away, but it happens again everytime i hit vtec in fifth
it doesnt happen if i hit vtec in any other gear just 5th

so my question is why? is it bad? and how can i fix it?
thanx in advance

 

well i dont know if this will help you but i had similar problem in my 94 civic cx. with d16a vtec motor with turbo. comes on when i'm at a high rev. say example 4th,5th gear at 6000+ rpm. i once stop and check the code to see waht it is and it said it was my vtec solenoid. after checking it out everything seem fine and the code would disappear after turning off the engine and turning it back on. i was lost until one day i finally check the wiring from the solenoid to my ecu and it was a bit loose. i re wire it making sure to give it lots of slack and the problem never came back. my guess was that when i was going fast a quick bump on the road or a quick jerk from a hard shift cause the vtec wires to disconnected really quick. again. i hope this help. good luck.

 

hmm ill check that out
thanx
any other suggestions?