Compression Test HELP

[uurfantasy]

For a '91 with about 120k miles the numbers I got on my compression test were 150/150/150/150/148/145 not in order, those are just the numbers. Are those numbers waay too low?

 

[s14_tat]

did the do the test when the engine is warm? this allows the piston and rings to expand to form a better seal. you are also suppose do crank the engine at wide open throttle.

if you didn't do those, then try again using that method. your numbers look very even so it should be fine.

 

[uurfantasy]

yeah it wasn't done w/open throttle and im not sure if the car was warmed up or not either

 

[nis350]

yeah it wasn't done w/open throttle and im not sure if the car was warmed up or not either

I think having the even # across all 6 cyl. is a good sign.

 

[RON98]

loosk good.

not really looking for numbers but rather % loss between the cylinders.

if you have a 20% drop in one cylinder, your in trouble

 

[Sulley]

They fairly even but low for absolute numbers at sea level. What is the elevation where you live?

 

[uurfantasy]

1808 ft above sea level

 

[VBNSX]

just a few more facts about doing the test...

http://www.nsxprime.com/forums/showthread.php?t=52228&highlight=compression+test

basically:
warm engine
remove all plugs (not MANDATORY but eh... it's what i do)
pull injector resistor pack to prevent fuel from coming in..

x

 

[Big_D]

Looks okay, within 5 psi is good. Like others have said unless, the test should be done warm and at WOT...without doing that, you wont get higher numbers. Mine was at 145-150 across the board and it has only 60K miles.