Hello again. Got my 1994 Mustang with a 3.8L again. as far as the random misfire, there is no code set, but you can tell there is an intermittent mis fire when you stick a piece of paper to the tail pipe and it is an uneven pulse. I have check for everything else. Fuel pressure is normal, there are no vacuum leaks, and the battery and charging systems are all good as well. I have also hooked up all of my spark wires to a PICO scope. When I did this, the secondary waveform looked very odd. So i was wondering if anybody had pictures of what the waveform is suppose to look like and if you know if it is a wast sparking and multi-stick system. I have also found when testing the wires that i had an intermittent spark on cylinder 5, replaced the wire with a different one and the idle got a little smoother. I also check all of the coil pack with a spark checker and found that it works so that is ruled out. Just thought if any of you had any thoughts and if you had any problems like this. Thanks.
Mustang Sally
Mustang Sally