I've got a '95 Z28 that constantly refuses to start when it's wet. I've replaced the coil wire and even replaced a battery. I'm getting loads of current from the coil when I twist the key. What else could it be?
Pretty common in these for the distributor to go bad. This is the optispark unit behind the water pump. IF your car has over 75K miles on it you might look in that direction. Excellent article on the 95 optispark unit at www.charm.net/~mchaney/optisprk/optisprk.htm
if the site is still active.
If the coil's sparking,has to have a bad cap or coil.I've seen the cap with a big burn hole in them. Not a cheap cap and rotor,I know neihoff makes them aftermarket.I priced a GM one a year or so ago,seems like 300+$.
This is just a thought. Didn't those 93-95 Lt1's have a problem with water in the cap? I have a 1996 Chevy Camaro and just changed my cap and rotor. My 96 has two openings in the cap that are connected to hoses that run up to my air intake. I beleive they are there to dry out the cap. A friend of mine was having a similar problem with his 94 Z28 so he put the cap for a 1996 on it and just ran the hoses to the air intake. It has been running fine ever since. Hope that helps.
it is a Optispark module.except its in the front of the engine right in front of the waterpump. and the rotor and cap are very thin , or low profile should i say..but I too am learning about these Optispark engines, do they have a shaft like that of the regular cars that turn the rotor for spark , or is that controlled electronically by the photostatic relay inside the assembly housing...?