I have had a bad miss in my 95 ta.Iput a timing light on each plug wire.One of them is dead.Befor that i changed all plugs and wires,so im guessing opti.If the opti is going out could only one wirebe dead?Also i put the laptop on it today and the side with the dead wire is reading bad with o2.And it gave me a bad MAF code.Is the opti bad or what!!!!!!! Any ideas? Thanks ahead for any help.

 

I'm not sure whether or not you are already aware of this, but I've read many articles and postings in the past pertaining to the opti-spark systems, especially in the 1995 model year. Apparently, once the car reaches higher mileages (70,000+), the opti causes the engine to stutter and miss, etc. due to the build up of moisture inside the opti unit over the years. GM attempted to fix this prob by adding a vacuum line to the opti in '96-'97 to help suck out any moisture.

 

Well maybe if your car wasn't slow you wouldn't have that problem oh and let it warm up before you rev it your valvesprings are still cold and prone to break and hurry up and fix that thing so when i get my cam I can bust ya

 

Here's a shout out to the NC TA crew!

The '95 cars should have the vented opti, but not the OBDII crank poisition sensor. Usually when opti's go there is failure at a certain RPM range in random cylinders. Is this the case? If you have a consistent miss, it will cause the O2 sensor on that bank to read a rich condition, and will lean out the other cylinders to compensate. I have a feeling that they may never really be able to fully 'compensate' for the richness caused by the misfiring cylinder. Just for the record, a lot of people (myelf included) have replaced their opti unnecessarily and it didn't fix the problem. So you might want to check out a few other (cheaper easier) things first.

Hope this helps.