Hello, I have an 89 Formula. Sometimes while driving the tachometer will read high rpms such as at about 55mps - 2500 rpms and also when slowing down to a stop the rpms will dip below 500 and sometimes stall. I have new spark plugs, wires, ignition coil, distributor, O2 sensor, and TPS. I was thinking I should reset the TPS but anyother opinions on solving this problem would be appriciated.

 

Starting college soon neeeed my car =)