engine help

[rotary_rx4]

i made a compression test with the original mazda tester. and it showed.
 
FROND 7.3 7.2 7.3  REAR 0.00 0.00 0.00  OUHH?? what does that meen ??
 
help please

[Brett]

Hi,

Assuming you had the plug in correctly and the o-ring has sealed then it would it suggest you have lost a couple of seals in the rear rotor.  IF this is the case you will need to strip the engine and replace the damaged items.

Which engine/car is this test from?

:wave

[rotary_rx4]

thanks mate for replying
 
is from my rx7 fd.. it still starts but sound like a tractor.. is it possible to cracked all the seals and show 0000 readings? it shoulndt at least show somethin more than the 0 ?

[ad4m1]

Mazda testers will read zero values below a threshold. Usually this is 3.9 bar so any Reading under 3.9 will show as 0

[Aubec]

Also remember two knackered seals will show low compression on all three faces, one seal gone will show low compression on two cylinders, since each seal is the edge of two chambers.

[m1tch]

Fronts good, rear has blown, time for bigger ports