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Compression

877 views 1 reply 2 participants last post by  Jayare 
#1 ·
my lowest compression is 11.5 bar (166.8 psi) for cylinder #5 and highest is 12.8 bar (185.6 psi) for cylinder #3 .


right bank:
1= 12,2 bar
2=12,6 bar
3=12,8 bar
4=12,6 bar

left bank:
5=11,5 bar
6=11,8 bar
7=11,6 bar
8=12,1 bar

the difference between lowest and highest is more than 11% which is 1.3 bar. Alldata.diy says that everything under 1.5 bar is ok but some sources say that everything above 10% is not ok.

So, can this be a reason for rough idle/low rpm ?

P.S.: three weakest cylinders are together (#5,6,7).
 
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