Compression test using a piston engine tester :

1) note battery strength. A weak battery will yield low compression results.

2) Remove both lower plugs and wires.

3) remove EGI fuse from engine fusebox.

4) have a friend floor the accelerator pedal, opening the throttle for more airflow

5) insert your tester into the leading hole

6) hold the valve on the side of the tester open

7) have your friend crank the car over for 5+ seconds.

8) observe the needle bounces. You should see 3 in succession without skips, even bounces, in roughly the 30-35psi range.

9) let out on the valve now, and let the tester reach an overall compression value for all 3 faces(highest of 3 will be displayed). 115+ is like new, 100-115 is healthy, 90-100 is getting weak(1 year or less in most cases) below 90 could blow at any moment.

10) repeat for opposite rotor. Note difference in overall compression between rotors, which should be no more than 20psi max.


copyed from rotary resurrection web page.

 

http://media.putfile.com/rev-up-rx7

here's a video of idle/ revving.

 

thats a fuel problem. It should not drop like a piano.

Mine sounds like it starts to stall but I can still catch it. Even when I first start it up.

 

really? but a fuel problem can be an air problem too

 

but does it sound like a blown seal?

 

really all I wanted to know with this was whether it sounded like a blown apex seal or not

 

uhh, I see a weak spot in the compression. I see two large puffs of smoke and one weak one. I would suppose that means a weak seal. Same thing with the compression test.

I think you have a failing seal if all else fails. Thats my opinion.

Remember, if "All else fails". and that is my "Opinion not a fact".

-nick-

 

After going through all of your vids, seals sound reasonably good. More than likely from my view atm is that you have a vacuum leak. It's either between the afm and tb, or in the vac lines somewhere.

If it was a fuel problem, it would not rev so easily and quickly, nor as high.

 

For a minute, I had a flash back of Led Zeppelin. Dazed and Confused.

 

thanks guys. vacuum leak finding time