the throttle on a hot engine is blocked near 100% this is why it cant pump air, and thus the rule.
the isc can NOT supply the air,
do it warm, or hot.
do it wide open throttle each step is on my compression page. 1/2 open throttle wroks just block it open at the TB, 0 throttle wastes the whole effort.
do it all sparks out
do it battery charged.
add oil to do more.
each time the piston goes down it must get a full slug of air, it only gets 1 time to do that. (and peak the gauge) crank and watch it peak, and done.
it must not pull a vacuum. or the test is wrong.
that full slug of air , gets compressed by CR value, say 9:1. this is what makes full compression, my vw does 100. my lawn mower does 50. but this high CR engien does almost 2 times my vw.
i bet its ok as 170PSI , IIRC, is low spec, so???? 16v..... (its a factor of CR compression ratio, and no bad valves and rings) and altitude, in Denver is less in fact. 0.83 times
160 is not too good, but???
my 16s
both did (500ft altitude)
My 97 pulls 185 PSI min. dead cold. (a new head) later and hot it does 195 PSI. Old 100k mile engine, now with new oil rings, new crank and new head.
so 185 cold, is good.
the cylinders are no round cold thus warm or hot test. to get a bench mark.
in Denver my 195 would be,,161 psi, (a huge difference, they lack air up there) use my tables on compression page
http://www.fixkick.com/compressiontest.html
the isc can NOT supply the air,
do it warm, or hot.
do it wide open throttle each step is on my compression page. 1/2 open throttle wroks just block it open at the TB, 0 throttle wastes the whole effort.
do it all sparks out
do it battery charged.
add oil to do more.
each time the piston goes down it must get a full slug of air, it only gets 1 time to do that. (and peak the gauge) crank and watch it peak, and done.
it must not pull a vacuum. or the test is wrong.
that full slug of air , gets compressed by CR value, say 9:1. this is what makes full compression, my vw does 100. my lawn mower does 50. but this high CR engien does almost 2 times my vw.
i bet its ok as 170PSI , IIRC, is low spec, so???? 16v..... (its a factor of CR compression ratio, and no bad valves and rings) and altitude, in Denver is less in fact. 0.83 times
160 is not too good, but???
my 16s
both did (500ft altitude)
My 97 pulls 185 PSI min. dead cold. (a new head) later and hot it does 195 PSI. Old 100k mile engine, now with new oil rings, new crank and new head.
so 185 cold, is good.
the cylinders are no round cold thus warm or hot test. to get a bench mark.
in Denver my 195 would be,,161 psi, (a huge difference, they lack air up there) use my tables on compression page
http://www.fixkick.com/compressiontest.html
http://www.fixkick.com