Finally found the issue!!! I hope
10-29-2018, 09:59 AM
#21
Senior Member
Sorry guys, I was typing and thinking incorrectly before my coffee. I know you guys have helped. I'm just not with it this morning. Disregard my comment earlier. It just came out wrong.
if any of you are married I'm sure you understand how that happens.
if any of you are married I'm sure you understand how that happens.
10-29-2018, 10:02 AM
#22
Driving the wheels offer
with all that pro help available, i wonder why he even bothers with us
10-29-2018, 10:28 AM
#23
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10-29-2018, 11:23 AM
#24
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ah, makes sense 
10-29-2018, 06:31 PM
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I tested the compression again just now, ans all the cylinders are showing around 118 to 130 psi, with or without oil in them? Confused as why they were so different yesterday
10-29-2018, 07:28 PM
#26
Driving the wheels offer
pressure can sometimes encabulate on the first go round of testing - i'd say the second round numbers are closer to actual
10-29-2018, 07:39 PM
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Thank you, well with that said, the oil leak is fixed, pressure seems good, the only thing left i can think of is bad fuel injectors possibly, you guys tell me maybe im wrong, but since plugs 1 and 2 were pretty damaged compared to all the other ones, do you think those injectors could be bad and that i should replace injectors and plugs, also, can a bad injector damage a plug?
10-29-2018, 07:39 PM
#28
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If that's accurate, and the engine has enough compression to run without misfire, it's still usable. You can manipulate blow-by to get by, but you have to separate it from the intake IF it's too heavy. 130 x 75% is about 97psi min, but that minimum is far too low for good enough combustion. Actually, I'm not sure exactly how little compression you can get away with here. But I do know the cylinder will not fire when there's not enough. You don't have that problem...yet. Puts it in the green for now. But, you need to re-verify compression numbers...as many times as it takes to confirm actual. Otherwise it's about worthless. Currently your numbers vary far too much from your previous attempt. So you need to get the test procedure down to the point you come up with the same results...test after test.
Last edited by Jbrew; 10-29-2018 at 07:49 PM.
10-29-2018, 07:52 PM
#29
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If that's accurate, and the engine has enough compression to run without misfire, it's still usable. You can manipulate blow-by to get by, but you have to separate it from the intake IF it's too heavy. 130 x 75% is about 97psi min, but that minimum is far too low for good enough combustion. Actually, I'm not sure exactly how little compression you can get away with here. But I do know the cylinder will not fire when there's not enough. You don't have that problem...yet. Puts it in the green for now. But, you need to re-verify compression numbers...as many times as it takes to confirm actual. Otherwise it's about worthless. Currently your numbers vary far too much from your previous attempt. So you need to get the test procedure down to the point you come up with the same results...test after test.
10-29-2018, 08:02 PM
#30
Senior Member
The compression test is cylinder variance within 15%. So when you get solid numbers, multiply the highest number (max #) x 75%. That will give you your bare minimum (min #) for the rest, or comparison.
130 max comes out to 97.5 min
130 max comes out to 97.5 min