1st time I got 160 155 160 170
2nd time I got 180 150 and I didn't bother with the last two.

How come they're different? I read the tutorial from c-speedracing.com but they're not clear on how long should each crank last

also I hear this weird screeching sound, hope that's normal

 

those are close to my results too... I got 185, 180, 155, and 160 or something like that. Perhaps a bad gauge? Go down to Autozone and borrow one, or if you want I can drop by and test it out with mine since I'm only 10mi or so away. You should crank about 5-7 times, WOT, remove ECU fuse. I think that's it.

 

it's a brand new one that I got today. since I get different results shoudl I crank it maybe 10 times and maybe about 2 seconds per crank?

 

Just let it keep cranking until the reedle on the gauge stops going any further

 

just crank it until it peaks

mike

 

I used 5 crank as a standard, but the 2nd clinder will go further if I crank it more. So I should crank until the needle will not move any further? someone confirm this

 

Yes, crank until it stops moving. It shouldn't require cranking on it for more then 5-10 seconds. Make sure you are constantly cranking, DO NOT crank 1 time, stop then crank agian.

 

I got 190 180 185 180

I think it's a good thing!!

mach af, that's exactly what I did the 1st time


[Modified by Loveless, 6:24 PM 3/30/2003]

 

are you doing this with the motor hot and throttle open?

 

the car has been resting for maybe about 20 min, it's still pretty hot but I'll do it again tommorow. I forgot to step on the gas peddle too


[Modified by Loveless, 6:30 PM 3/30/2003]

 

the result came back

200 200 190 195

hot engine, throttle open all the way


[Modified by Loveless, 6:49 PM 3/31/2003]

 

 

it's a good thing according to the test. Are there other things I can check or do to make sure the motor is in top notch spec?

 

Do you need to zero out your cam gears before doing a compression test?

 

no. Well you can but it wont matter since you're gonna spin the engine around anyways - just looking for a max reading.

 

I cranked each cylinder 3 times. each time I wait until I hear 10 cycle (maybe about 5 seconds) until I turn it off. Overkill? Will this cause inaccurate numbers?

 

naw mang just average the #'s together, nice #'s by the way, healthy motor