Need some help on a engine problem
#1- Opti
2- Ignition coil
3- Spark plug wires
4- EGR Valve
5- Collapsed Lifer- (driver side does tick)
6- valves need adjusting
7- Fuel pump
8- Fuel filter
9- Bad Gas
10- Dirty Manifold
11- What other optons you can come up with...
Agree with Gangly, try the easy and cheap stuff first but sooner or later you better plan on replacing the Optispark....sorry to be the bearer of bad news
Optispark 
