01-26-2015, 05:23 AM
greetings and welcome.! 94/8v
100 compression is bad, was that with the throttle blocked and warm to hot engine?
the compression test , will prove the cam is timed, that is why im so critical of it. 150psi is min. not 100. my lawn mower does 100 as does my 1968 vw bug.
but this engine is a high compression engine. and does 150 easy.
its flooding, wot cranks cut all fueling, if not, the injector is leaking. wot = wideopenthrottle.
cold compression is 150. min. if lower, the cam has slipped. or keys sheared.
for sure if all 4 are equal and same low pressure, that means the cam is retarded, or the CAT melted.
vacuum cranking is about 5 inches HG if 0 or near zero the cat is melted. or valve burn or lash way off,
100psi, is it. im sure.
need to find out why,
compression is done warm but cold is ok, it dont start so... we still look
all spark out.
battery fully charged.
throttle blocked open, or engine starves for AIR (even 1/2 open is ok)
and let pressure gauge needle peak. then stop cranking.
test 2 if compression is ok
pull fuel pump relay, will test fuel work for 3 seconds, each spray, repeat 3 times or so,. sounds good.
if yes, the fueling system is bad. (lots of tests) not hard. but ill wait for , this point in time.
100 compression is bad, was that with the throttle blocked and warm to hot engine?
the compression test , will prove the cam is timed, that is why im so critical of it. 150psi is min. not 100. my lawn mower does 100 as does my 1968 vw bug.
but this engine is a high compression engine. and does 150 easy.
its flooding, wot cranks cut all fueling, if not, the injector is leaking. wot = wideopenthrottle.
cold compression is 150. min. if lower, the cam has slipped. or keys sheared.
for sure if all 4 are equal and same low pressure, that means the cam is retarded, or the CAT melted.
vacuum cranking is about 5 inches HG if 0 or near zero the cat is melted. or valve burn or lash way off,
100psi, is it. im sure.
need to find out why,
compression is done warm but cold is ok, it dont start so... we still look
all spark out.
battery fully charged.
throttle blocked open, or engine starves for AIR (even 1/2 open is ok)
and let pressure gauge needle peak. then stop cranking.
test 2 if compression is ok
pull fuel pump relay, will test fuel work for 3 seconds, each spray, repeat 3 times or so,. sounds good.
if yes, the fueling system is bad. (lots of tests) not hard. but ill wait for , this point in time.
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