I've notice that my RPM would jump up while i would start to accelerate and it looks like some kind of electrical problem but i don't know if it's related to the check light 67. Any help is appreciated thanks.

I just found the thread saying code 67 is the cat converter. But i'm still stumped on the reason why my rpm would jump up. It doesn't jump like an vac leak and seems more electrical.

 

67 is your cat/2nd o2 sensor. Going to have to get that replaced which is going to cost you alot cause there not cheap. Try resetting the ecu and see if it was just a fluke.