couple weeks ago one of my injectors messed up and started overspraying...they were the RC 310 . it mixed the gas with the oil. i took it to the shop and they told me to just change the injectors and drain the oil and the spark plugs. so i got some RC 550. and the car started up, but when i would gas it the rpm's drop a lil before raising up. and i drove it but it wouldnt get no power after 5 thousand rpm's...is it just becuase i need to retune cause of the injectors?... has anybody had this problem or know anything about it..any advise would be great..thanks guys.