Sporadic compression test results

[Jake_ak_cent]

So I just performed a compression test on my engine, and the results have me a little baffled.
Cyl 1 107
Cyl 2 200
Cyl 3 89
Cyl 4 92
Cyl 5 410
Cyl 6 N/A couldn't get a reading

What the heck is goin on here? Is my tester bad? Cyl 6 the engine wouldn't crank it would just whir so I decided to stop cause I must've been doing something wrong. And holy mother of god cyl 5...:aigo:

Any input guys?
90 Supra Turbo.

 

[IJ.]

Throttle held open?

410 leads me to believe it's broken..

 

[Jake_ak_cent]

Throttle was indeed held open.

 

[hvyman]

Sounds like bad gauge.

 

[Jake_ak_cent]

Hahaha guess that's what I get for buying a cheap compression tester. Now I gotta call up my buddy and borrow his.

 

[Nick M]

Improper usage of the test guage is also a choice.

 

[Backlash2032]

Lol... I remember when I was baffled at how low my compression was... I only tested one cause I was bored.. But it was 135.

I had the throttle closed lol