I have burned up 3 cats since December. I hav changed all the o2, map and maf sensors. Plus when on a cold start the car the rpm rev to 2000 the creeps back and when i take off it boggs out until i release the gas and step back on the pedal. Also when I put the car in park the engine revs up n dwn from 1200-2000 rpms. I have a aem v2 cold air intake. any suggestions on what it could b???

 

is your check engine light on?

 

Have you changed your plugs? tune up recently?

Check your timing.

 

No check engine, change the timing belt August 2010. Can't remember the plugs and wire change. But think it was last December.

 

Even if there isn't an engine light, does not mean there is no code. Check for codes.