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Compression Test

Old Dec 28, 2011 | 05:16 PM
  #1  
mrstoks's Avatar
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From: Auckland - New Zealand
Compression Test

Hi all,

Am having huge drama's getting my Megasquirted FC started and running, have eliminated pretty much everything. Did a compression test (cold) and found both housings to have 90psi peak (non-return valve in place)
Then I taped the relief button in and saw 3 even pulses, but only around 35psi....
Is this because the tester is venting while the housing is building pressure?
Even so, 35psi seems a bit low?

The motor is freshly rebuilt with the full Atkins seal kit.

I have fuel, spark, timing correct, and engine still will not start. Lots of fuel vapour out the exhaust....

Thanks in advance for any thoughts!
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Old Dec 30, 2011 | 04:09 PM
  #2  
misterstyx69's Avatar
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From: Smiths Falls.(near Ottawa!.Mapquest IT!)
The compression numbers are fine.
There is a Megasquirt section on this forum.you may be able to get some help on your start up.
here: https://www.rx7club.com/megasquirt-forum-153/
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