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Leak down test. Compression test is very vague to diagnosis; with a compression test your really just looking for a variation between cylinders as the actual number is sorta regardless.
Boost leaks? Any codes?
Car is SD so boost leaks wouldn't affect the car this bad and no codes are coming up.
So long as it has low compression it is going to run awful. If you know how to do a compression test and the gauge is reasonably accurate fuel injectors are not going to fix it. You need to concentrate on finding what happened to compression.
Fabbed my own leak down tester, waiting for the epoxy to dry. Meanwhile, I bought a new compression tester and it is showing 70 on all cylinders. When I pulled the plugs, they were wet and the tops of the pistons had puddles of fuel on top.
So is that pretty much guaranteed bent valves? If so, how do bent valves happen when the timing is still dead on?
So I fed compressed air into cylinder 4 while it was at TDC with all the valves closed and I felt air coming out of cylinder 2.
I'm guessing that maybe the valves are good but the reason for the wet cylinder is just the low compression not burning all the fuel.
Any reason why air would be coming out of cylinder 2?
EDIT: after adding oil to each cylinder, there is no longer any air escaping through the rings. I'm hoping that this is simply because the car has been sitting and not running for a while but, regardless, it still runs terribly.
Started the car again and got it up to temp. I started pulling injector harnesses and when I pulled the cylinder 2 harness, it made no effect whatsoever on how it ran or idled. However, when I pulled the other harnesses, the engine would want to die.
I felt the runners and the cylinder 2 exhaust runner would warm up but not as much as the other runners did. I have a SpoolinUp COP and I've swapped back to stock and it makes no difference.
Sep 7, 2016, 10:18 AM
