compression test...

[speedjunkie]

Did you warm up the car first? It's supposed to be done on a warm engine.

For the record though, I've never had any luck with a normal compression tester either lol. Although I don't remember if the engine was warm when I did it either, because the only reason I did it was because the car wouldn't start lol.

[RETed]

Tell the store the gauge is broken.
Even worst case, it'll still do around 50psi - 80psi on a running engine.

Actually, a cold engine will register higher numbers on compression.
Cold engine will normally register 5psi - 10psi higher.

Not propping the TB will show 10psi - 20psi lower numbers.

Did you pull out *both* trailing spark plugs?
(You're supposed to use the top / trailing holes.)
If you're using the leading holes, numbers will be down 5psi - 10psi.
If you don't remove the other side spark plug, compression can be down 10psi - 25psi.


-Ted

-Ted