YOU KNOW, I'VS BEEN HAVING THE SAME PROBLEM WITH MINE. IDLES UP AND DOWN,,REAL HIGH MOST TIMES. I'VE REBUILT IT SO THERES A NEW DIST. COIL, ETC. IT'S A 1992 STEEDA AND THERE ARE LOTS OF ADD ONS, LARGER INJECTORS, HEADS, INTAKE, MASS FLOW. SO I THOUGHT THE COMPUTER MAY NOT BE ABLE TO HANDLE THAT ( BUT I DOUBT IT). MY BIGGEST PROBLEM IT THAT THE TIMING KEEPS "WALKING OFF". THERES A SUPER CHIP ON THE A9L AND APPARENTLY ITS FOR A COUGAR,,,NOT A STANG. SO COULD THE A9L BE SCREWED UP???WHY AFTER I TUNE EVERYTHING PERFECTLY AND RESET THE TIMING DOES IT SCREW UP AGAIN?( THE IDLE AND THE TIMING. )can anyone help me? I ALREADY ADDED NEW TPS

 

TURN OFF THE CAPS LOCK...You need a dyno tune.