pHEnomIC

iTrader: (14)

Well i was driving my Z to school today on the highway, it has been in storage for most of the past few months but i drive it when i went home from school.

Im getting a high rpm miss. I used to get it once in a while but now, pretty much every time im in the high rpms it will miss like crazy.

Basically i was on the highway and decided to make up some time on an empty stretch of highway so i floored it and when it was in the high 90mph it started missing like crazy and fell on it's face, simply wouldnt accelerate anymore. Took me like 5 secs to get any acceleration past that point. I slowed down and it did the same thing.

The plugs are all ngk tr-55s, i changed em last year and they are all gapped, the wires are all replaced and they are good.

I will log it with hptuners to see if i can detect any missing through that.

do you think this is opti or maybe something else?

Ill run some injector cleaner as maybe i ggot a bad injector but im not sure.

How can i absolutely make sure it is an opti? I don't have the time to blindly replace parts.
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LT1Falcon

iTrader: (3)

optis usually do fail most at high rpms, but im not garunteeing you its the problem

pHEnomIC

iTrader: (14)

Was there a guide anywhere on how to change the opti? I think i know how but i remember seeing something...

How do i prove that it is the opti at fault?

koolaid_kid

iTrader: (21)

Try these sites:
http://shbox.com/1/4th_gen_tech2.html#opti_test
http://www.charm.net/~mchaney/optisprk/optisprk.htm
Hope this helps.

camzaro28

Could easily be the opti, but before replacing that get a fuel pressure gauge and see if your fuel is up to par.
You are describing similiar stuff to what happened when my fuel pump went out.