Any way to tell if my car has had a Jet Chip used?

[57s98Camaro]

I put 92 octane in my car yesterday and it runs a whole lot better. No misses, stuttering, etc. Is there any way to check if my car has had a Jet Chip used on it that would require my car to run 91 or above octane? Also if it has been modified, will any harm come to the engine if I run 87-89 octane in it? Thanks in advance.

[speedy-v6-camaro]

Look at the PCM....if there is a big Jetchip module then you have it....if you don't see anything unusual....you don't. Thats the only possible computer tuning unless its custom done.

[pigglyroot]

there's powerprogrammers that plug into the diagnostics port too.

[57s98Camaro]

Is there some sort of cover that goes over the diagnostic port? Cause I just see the port exposed. That's what made me think someone used that kind of tuner.

[pigglyroot]

mine's exposed

[AllTheGoodNamesAreGone]

nope, there are no covers on camaro/firebird obdii ports

~Billy