So I just installed poncams from tomie which are a drop in with stock valve train also put on motordyne art pipes and gotta catback exhaust looking to put on headers and tune but after turning on car I noticed I was idling at 1000rpm (after tps and cams) I never had this issue before replaced spark plugs checked coils checked compression everything is good I've been looking at forums but nothing is really helping can you guys help tryna avoid taking to dealer and paying 80$ for a stupid scan I already did I'm only getting p0300 random misfire code also seen online it could be MAF sensors or 02 sensor plz help guys much appreciated by the way it's a HR 07 350z mods- catback exhaust,stillen gen 3 intakes, motordyne art pipes, tomei poncams.

 

If it happened right after you installed the cams and TPS then occam's razor says that it most likely has something to do with that. Did you make sure that the engine was still properly timed? Possibly a faulty TPS?

 

you prob need a tune