posted in the LT1 Tech..but need someone around that might have a garage and or know what to track down in the Z's problem area..just hit 80K...and now at WOT it missfires and very slightly idles rough..need some help and more than anything warm place to figure this out..I have a place if its needed but no tools or diagnostic equipment..
thanks guys!

 

Sounds to me like your Opti is taking a crap on you

LOL

 

Opti sounds like a logical start...have you replace anything ignition related lately ?

Marc

P.S. You might want to check out Ted's post about sig length

 

Sounds like opti. Try NE dyno tuning. I am sure they can help you out.

 

yup have to say opti mine was doin the same thing changed the opti all better.

 

Without a formal diagnosis, I would change out the coil and coil wire long before the opti. Stock coils typically only last 60-80,000 before they go bad and they are pretty cheap and quick to replace compared to the opti.

 

Yup, do the free/cheap/easy stuff first. Check the plug wires for wear too.

 

should I get a MSD blaster coil just for the upgrade to them and going to be adding the other stuff soon..or should I wait?

 

I really don't think it makes much difference. coil doesn't really help performance until you start pushing some serious horsepower. However, if you are going with an aftermarket ignition, I would normally recommend staying with the same brand for all of the components. It makes troubleshooting and support much easier that way.

Everybody has a favorite, MSD, Crane, whoever... I happen to have a MSD coil and a MSD 6AL. It has worked flawlessly for two years. I can't say it has done anything for me performance wise however.

 

You might as well, it doesn't sound like a bad idea.

Like Tnthub said, stick with the same brand for ignition components. For instance I have all MSD stuff on my car and I'm pretty happy with it.

Good luck

 

check out my 260+ post thread in LT1 tech, plenty of things it could be....
brian

 

I would have dean and Rob at NE Dyno convert your car to LS1 coil packs, they love to do that stuff cause its so easy