vtec - check engine

[billsan101]

a couple weeks ago i was cruising around, hit vtec, and when i came to a stop i notice it was idling really really rough, like the car was even shaking (I didnt notice the check engine light, but i wasnt paying attention)

the other night i investigated further, and 1 instance while i was in vtec/after for a couple seconds the check engine light started flashing, then turned off.

I couldn't reproduce the same results after a couple more tries.

Anyone have any ideas to what could be wrong? (99 civic si)

 

[Luvmycivic303]

If the check engine light was flashing, It means Catalyst Damaging Misfires. Thats when you want to turn the car off Immediately. The same thing happened to me, i went to check the code and it was a manufacturer code, something in the 1300's. I did some looking around on forums and some people told me to take a glance at the cap and rotor. There was some corrosion on the contacts but nothing too bad, i put a new cap and rotor on and everything was good for a while. The only thing is, i had my check engine light blink multiple times, thinking nothing of it, and it melted my catalytic converter. So i just cut the cat out and welded a pipe in, put in a o2 sensor cheater plug, and called it good, it runs alot better, idles great, and so far, everything is good. good luck, hope i helped.