KTuner.com

So vtec issue was fixed, turned out to be vtc solenoid. There is still an issue with idle being too rich. I have 1700cc Bosch injectors, it’s been tuned and they can’t get AFR to stabilize only in idle, driving it it’s fine.

Replaced the vvt solenoid and vvt switch. Pops p2646 code. Still doing same thing.

Also there’s no codes popping

My mechanic says “It works, and then sometimes it doesn't and after it doesn't, you have to reset the ecu and then it works again....until it doesn't.”

Replaced o2 sensor and had knock code coming up, knock sensor wiring was ripped out so that’s probably what was causing it.

Thanks! I’ll have to wait for my shop to respond after they get into it.

I have a 2005 k24a2(2005 tsx) turbo Acura RSX type s. It’s not popping any engine codes but the vtec isn’t working. I have the in ecu ktuner chip. The car runs nice other than no vtec.