need some help with a couple of things firt of my car is a escort 1.6 16v 1998 was having problems with my revs sometimes thay sit about 2000 rpm then drop to idle,other times they drop to abuot 500 rpm causing the car to nearly cut out ,was told it was my throttle body replaced this with a new one but problem still there, also about to fit a sports cat any thing i can use to clean the lambada sensor with and should i reset my ecu