compression test results

[wilfonzo]

i thought there was something wrong with my car and i was right

#1=100#2=75#3=60#4=150

there doesnt appear to be any coolant in the oil... is time for a new motor?

this is a ka24e

[s13sr20chris]

try the wet test. put a teaspoon full ouf oil in each cyl and retest.

also, you tested with all plugs out and throttle open correct?

how does she run?

[eastcoastchaos]

nope i was w/ him when we tested it. i've done my own both ways and i got the same results both times so we didn't think all that was necessary.

[s13sr20chris]

yeah, me too. i have heard that it "can" so i make a habit of it.

[sean8564]

So if thos numbers are correct you have 1 cyl that is good and now you need a new motor Have you had a leak down test done yet

[wilfonzo]

ill have to test it the way you recomended, it idles pretty rough and seems pretty weak especially after driving eastcoastchaos's

[eastcoastchaos]

1 good cylender? the only specs we could find said 190psi w/ a 14psi varience, what should it be.

where can you get a leak down tester or parts to make one. i get weird looks when i ask anyone for something like that. it would have helped me a lot. i thught i had a blown head gasket a while back and pulled the head to find 2 bent valves.

[wilfonzo]

oh well looks like swap time

[sean8564]

Email me if you need a motor I get one for you good quality and fair priced you pay when you get it. [email protected]

[gehzumteufel]

those are some really nasty compression numbers. even worse than the RX7 i had. lol. and the worst psi rating on those ou want is 85 on each rotor which is still really bad and in need of rebuild. was it owned by a young kid before you? seems pretty beat up

[wilfonzo]

yes indeed it was

[DAEDALUS]

yeah, me too. i have heard that it "can" so i make a habit of it.

Not that I've measured it both ways, but I'm surprised it would ever not make a difference. The slower the compression stroke, the more air leaks out during the stroke. Having all the plugs out just gives less resistance to the starter from the other 3 cylinders, but it may not matter if the battery/starter are strong. However, I'm pretty sure having the butterfly valve open is a must. If it's closed, where will the air come from for compression? Need to minimize/eliminate manifold vacuum while cranking, let the engine breathe.

[wilfonzo]

good point