Compression test, piston rings, head gasket
Thread Starter
Senior Member
Joined: 03-17-2012
Posts: 1,042
From: Bay Area, CA
Are the plugs oily or steam cleaned or just a nice brown. https://www.mobil.com/en/lubricants/...ck-spark-plugs
Even with variations in readings if you were to try a different tester, that's pretty low compression. A healthy engine would be around 180, plus or minus. 100 would be bad.
Let's see what the other cylinders say, but I'm guessing you're heading to a leak down test.
Have you tried a "wet" test yet? That's usually good for diagnosing rings.
Let's see what the other cylinders say, but I'm guessing you're heading to a leak down test.
Have you tried a "wet" test yet? That's usually good for diagnosing rings.
All cylinders 130psi. Pour 5w30 into each spark plug hole?
yes, 130/135 psi
Senior Member
Joined: 12-05-2014
Posts: 3,352
From: Northern Ohio
Everything says this thing is running very rich at high vacuum if not all the time. Wonder if it had a tune you didn’t know about. Wonder if it is an E85 ro E47 tune. (I have no idea how to figure that out.)
Your car doesn’t by any chance have blue MAP sensors or a “premium 91 only” sticker at the fuel cap, does it?
Now I’d want to look at the injectors and see if they’re stock. Also maybe use you bluetooth dongle and app to chart fuel pressure, a/f, and 02 voltage all together while making white smoke.
Your car doesn’t by any chance have blue MAP sensors or a “premium 91 only” sticker at the fuel cap, does it?
Now I’d want to look at the injectors and see if they’re stock. Also maybe use you bluetooth dongle and app to chart fuel pressure, a/f, and 02 voltage all together while making white smoke.
Thread Starter
Senior Member
Joined: 03-17-2012
Posts: 1,042
From: Bay Area, CA
Everything says this thing is running very rich at high vacuum if not all the time. Wonder if it had a tune you didn’t know about. Wonder if it is an E85 ro E47 tune. (I have no idea how to figure that out.)
Now I’d want to look at the injectors and see if they’re stock. Also maybe use you bluetooth dongle and app to chart fuel pressure, a/f, and 02 voltage all together while making white smoke.
Now I’d want to look at the injectors and see if they’re stock. Also maybe use you bluetooth dongle and app to chart fuel pressure, a/f, and 02 voltage all together while making white smoke.
Thread Starter
Senior Member
Joined: 03-17-2012
Posts: 1,042
From: Bay Area, CA
