I checked my codes before going to the track and the car started to act funny and came up with code 33. Should I just replace the EGR valve or can it be cleaned. The car is stumbling sometimes at idle and even loose's power not at wide open throttle but cruising. Should I just
replace it and the cap and wire's and see how it does I just put new plugs in it recently and it doesn't do it all the time but it does do it.... I'm probably going to go ahead and clean the mass air sensor too with some cleaner and a Q-tip from what I can gather from doing some research on this CODE and the issure's I'm having....RIGHT??

 

33 is a hard code to diagnose online. You're gonna need to check the vacuum connections going to the EVR and the EGR, test whether or not the EVR is working, test whether or not the EGR position sensor is working, test EGR function.