Compression Test...

[champazn]

hey guys,

As you guys may know im having a few issues with my car so i had a compression test today here are the results

1)160

2)170

3)175

4)179

5)100 <-- I think this may be the problem

6)180

Fill me in guys tell me your thoughts.. not sure what these numbers mean.. so give me your thoughts and the when i was compressing the 5) one it made thumping noise as well. The car still doesnt start at all please suggestions will be helpful

thanks
J

[DaveH]

Was the test done with the engine warm or cold? Did they add oil to cyl #5 to see if the comp got better?

[soarerflame]

oh i got 176 all across the board before boosting!

[champazn]

Yea, i retested the 5 like 4 times man...just to make sure