s2kbtos

i just did the copression test on my s2000 and it came as this


1#195
2#180
3#178
4#178


this test was done when the car was cold and sitting at my garage for 2 days.

Billman250

Could be normal.

Do it hot the results will be very different.

Make sure:

-all plugs are out
-throttle is wide open
-fuel pump fuse is removed

iDomN8U

run the car to normal operaturing temperature then try again

FF2Skip

Just like a dyno sheet, do not get hung up on the numbers by themselves. If you had a huge disparity between one cylinder and the rest, that would be of concern. Do as the above gents said and re-test.

s2kbtos

the plugs were out but i forgo to take out the fuse and i didn't press on the gas pedal. i will try to do it tomorrow.

AP_ONE

youll get a very different result and be happy you didnt give it gas then lol!

Billman250

Not removing the fuse is NOT good (in other words, it's important to remove it)

If the fuse is left in, fuel is sprayed into the cylinder during cranking, washing the oil from the rings yielding lower comp numbers.

s2kbtos

ok guys! thanks! Bill!


you know i did the compression test today and i got

1#205
2#205
3#205
4#205

so i think the engine is pretty good!

Apex_AP1

what can cause a compression leak? and will any places do a on-the-spot compression test for free like a cel reading or battery check?

jyeung528

bad rings, bent valves or valve guides or seals...head gasket...etc.