The instructions on the compression tester say to disconnect the gas line, but I was wondering does it even matter besides the fact that you will get a lot of gasoline in the cylinders? Will it affect compression numbers like a cap of oil would on a blown ring? My guess is that it wouldn't affect it much, but was wondering what other people think/know.

 

u dont want to flood ur engine with gas, plus it will affect the comp results if ur fillig the clyinders with gas. waht you should do is pull the ecu fuse, that will keep the injectors from firing

 

Yea, i will do that next time, but do you think that gas can affect the compression numbers to like +50psi or so? It seems unlikely to me.

 

well once i put in a tiny bit too much oil into the cylinders, and i was peggin like 300psi, , go figure, hehe

 

yea, that's pretty high, but gas is so much less viscous than motor oil.

 

just pull the fuel pump fuse... its in the driverside kick panel i believe.