Join Date: Sep 2008
Location: Fruitland Park,Florida
If your unshure about opti performance of low & high resolution pulses, your only 100% way of testing them is with an oscilloscope. Luckily, you can buy a pc based scope for around $70 on ebay, amazon, etc.
Use the scope to check low & high res signals of opti for proper square wave. See if signal changes shape, degrades, or completly stops when engine acts up.
Crank pulley & damper do not affect opti performance as opti runs off of timing gears.
Msd opti has not been on recommendation list for a while. They were having reliability problems with them and I don't know if Msd has overcome this problem. Only optis to use are GM, Delco, or Delphi.
There's also the possibility that all that is needed to cure problem is cap, rotor, plugs, & wires. People forget these are regular maintenance items.
Last edited by cocobolo95; 05-17-2019 at 07:35 AM.