Last year, I spent a lot of time cleaning up my engine bay in my 1993 LT1 Camaro. Part of the process was to relocate my Crane ignition box to the interior on the firewall. I also cut off the plug that leads to the Opti-Spark and hard-wired the wires together (to get rid of the big plug). Not the plug that goes into the Opti-Spark but the quick disconnect that is on the passenger side of the intake manifold. Before I did all of this, the car ran very good. Now, after everything was done, it has a bad misfire only around 5,800 rpm. The car pulls very hard up to the RPM.

I don't know if it is the Optispark, but I would like to examine all other issues first.

I did try to replace the coil, but it was fine. I also looked at the plug wires and put in frest plugs, and the problem is still there.

Here is how I wired up my ignition box in the interior. I took the white wire that comes out of the tach filter and the white wire that comes out of the ignition coil module, and hooked it up to the white wire on the Crane box. I then took the the pink wires and hooked them up to the red wire on the Crane box. I then ran a heavy gauge wire from the Crane orange and black to the coil.

Do you think that my problem could be in either the wiring that I did for the ignition or the opti spark? I did add length to the igntion wire but not a lot and I increased the gauge size.

Is there a way to test the voltage to both components?

Does either the ignition coil or opti look for resistance and did I change the resistance?

Any help would be appreciated.

I would try to replace the opti but I am also planning on doing a cam swap and I am going to have the car dyno tuned by Pcmforless in April. Because of the cam swap, I won't be able to drive the car hard to see if I solved the problem because the car will need tuned. Then, I don't want to be at the dyno tune to find out that the opti wasn't the problem because this is probably the only time that pcmforless will be in my area to tune.

 

Probably a better question for our LT1 section

 

Does your Crane ignition has any type of rev limiter? Could it be the factory rev limiter programmed in the stock PCM?

 

unless you have raised you rev limiter, then you need to start shifting a little sooner.

 

Thanks guys. I have programmed the factory rev limiter t over 7,000 rpm so I can rely on the Crane rev limiter which I have set at 6,400 rpm. Everything worked perfect before.

Does anyone know if the ignition module or optispark look for resistance or voltage?

Thanks,
Jeff