ok i just did a compression check on my 89 stock rx7 wit 13b engine ..... T1= 72psi ..... L1 = 75 psi ...... T2 = 15 psi .... L2 = 12 psi ........ what does that mean .. i know its supposed to be around from 105 psi to 120 psi .... please help what do i do

 

does it run?

if not, than your rear rotor is blown

if it runs fine, you might have done the test wrong...

also, you really only need to put the compression tester in the leading holes. both the leading and the trailing both go to the same combustion chamber.

 

what is the sotry with the engine? Been sitting ofr a long time?
Or is it acting funny so you decided to run a comp test?

 

what are the measurements for each face of each rotor, taken from the trailing plug hole?

 

The numbers you have provided indicate that the engine is blown. If it starts and runs on both rotors then the test was faulty,