lets go to back to zero here.
you did compression cold and it failed. 150psi is too low, for any G16-16valve,
195 is warm/hot, is factory spec, , mine did 185PSI dead cold.
all 4 reading low 150 smacks of cam timing is not RIGHT. (or tool lies or not done test (sparks out , throttle open and let it peak) compression is a prime pieces of evidence. (and for sure not almost equal and not changing , test per test)
never seen 150 on any 16v (times 4 mind you) ever, or rings are all shot on all 4 pistons and super odd all 4 worn same exact amount, that is what I think
the 8valve sure has less compression only because the CR is lower, compression ratio lower. on 8v. 16v does
The reading wrong , I check belt slip, (cam) and the crank key from being a wreck.
vast number of these cars engine the key is a wreck.
I have this tool called TDC finder to spark plug hole #1 that proves the key slipped. (crank snout key)
but if unlucky that tool can lie, if the crank cog is loose it will lie. and spark wrong and random, and cam timing wrong ,
the crank shaft turns CW (end viewed) and this makes it want to advance the cam.
that means the cam retards (late) and spark too.
note the double effect there, crank is advance (pistons too) and cam is late and retarded. BIG OUCH there.
the crank bolt must be 94ft/lbs (CW) 17mm large bolt. if not it slips and wrecks the SNOUT.
cam then retards and spark too, (adanced means - x BTDC from -5 to -40 BTDC , retarded is from -5 the other way to DEAD WRONG ATDC.
to burn all the fuel it must advance and not ever RETARD.
this is like a day 1 check on all G16 the snout not damage. (crank cog front stout keyway , damage frankly unlimited)
you did compression cold and it failed. 150psi is too low, for any G16-16valve,
195 is warm/hot, is factory spec, , mine did 185PSI dead cold.
all 4 reading low 150 smacks of cam timing is not RIGHT. (or tool lies or not done test (sparks out , throttle open and let it peak) compression is a prime pieces of evidence. (and for sure not almost equal and not changing , test per test)
never seen 150 on any 16v (times 4 mind you) ever, or rings are all shot on all 4 pistons and super odd all 4 worn same exact amount, that is what I think
the 8valve sure has less compression only because the CR is lower, compression ratio lower. on 8v. 16v does
The reading wrong , I check belt slip, (cam) and the crank key from being a wreck.
vast number of these cars engine the key is a wreck.
I have this tool called TDC finder to spark plug hole #1 that proves the key slipped. (crank snout key)
but if unlucky that tool can lie, if the crank cog is loose it will lie. and spark wrong and random, and cam timing wrong ,
the crank shaft turns CW (end viewed) and this makes it want to advance the cam.
that means the cam retards (late) and spark too.
note the double effect there, crank is advance (pistons too) and cam is late and retarded. BIG OUCH there.
the crank bolt must be 94ft/lbs (CW) 17mm large bolt. if not it slips and wrecks the SNOUT.
cam then retards and spark too, (adanced means - x BTDC from -5 to -40 BTDC , retarded is from -5 the other way to DEAD WRONG ATDC.
to burn all the fuel it must advance and not ever RETARD.
this is like a day 1 check on all G16 the snout not damage. (crank cog front stout keyway , damage frankly unlimited)
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