Hey guys! my first post so here it goes. I have a 1995 punto and i am having problems with my engine at somepoints when the engine is at sertane tempature i think it starts to rev it self when im not doing anything. it goes up to and jumps from 2000-2500 for some time before going back down. is there possible to code read my car and where is the plug. and also what do you think the problem is, could this be bad lamdba sensor? Thanks.