Ignition skips when warmed up

[kk2tii]

I have a 72 tii. It has petronix and msd and a TEP air intake. (I added the intake because the original air cleaner was incomplete when I bought the car and it was breathing unfiltered air.) When cold the car runs great...the timing ball is right where it should be and rock steady. 3 minutes later when it's warm the car starts bucking. Get it back to the house and put the timing light on it and the ball is dancing all over the place and you can see the skipping in the timing light.

Any ideas? Thanks - J.

[c.d.iesel]

distributor cap on crooked ?

rotor fried ?

go back to points and coil and try that ?

distributor seated down fully/and tight in the drive housing ?

what was done to the car JUST BEFORE THIS STARTED ? WHAT DID YOU CHANGE ?

[kk2tii]

The change was the msd/petronix, which I haven't gotten dialed in. The fact that it runs well cold makes me think there's something I'm missing. Starting over with points etc makes sense but frustrates the heck out of me.

[nbristow01]

I had this EXACT issue last week, non Tii. I put on new Bosch plug wires and runs like a freaking dream.