I've got a theory...if I were you, I wouldn't trust anything I write after my other mix up where I was clearly focused too much on the belt marks relative to the rear timing cover marks and not enough on your cam marks. Unfortunately I do know exactly how it all works and how many cogs should be between each gear, etc etc etc. So I still feel really bad for writing what I wrote!
Anyhow, so here's my wild crazy theory. And for the sake of my other post, we'll call it nothing more than a theory.My theory is that your exhaust cam shaft "has obviously" [grin] slipped, but has slipped rather perfectly. So, it's actually "in time" but it is now not open and/or closed always at the proper time. As in, by some miracle, your belt has slipped exactly 12 cogs. So here's my theory on what you've got. I'll list the stroke, then intake valve position and then the exhaust valve position...and let’s just imagine that very approximately every 24 cogs, the camshaft rotates approximately half, so very approximately every 12 cogs, the camshaft rotates a quarter. This has shifted when your exhaust valves are opening and closing. In my theory, at any rate!! My theory, pure speculation...to be taken with a grain of salt, of course! Normal
Stroke Intake Exhaust
Induction Open Closed
Compression Closed Closed
Power Closed Closed
Exhaust Closed Open Your car based on exhaust cam position Stroke Intake Exhaust
Induction Open Closed
Compression Closed Closed
Power Closed Open
Exhaust Closed Closed So, your compression test reads good. Because the valves are actually closed still in the compression stroke. All the valves have to be closed perfectly in order to make compression. So that means they're not bent. Again, god damn lucky! In any case, you don't make any power because when the spark ignites on the power stroke, which it probably does, the fuel and the air are able to exit out your opening exhaust valve as the piston goes down. So you got no power as either the mixture never ignites beyond just a small flash probably. Or if it the valve actually stays shut long enough to ignite it properly, the valve is opening pretty much immediately after allowing the power stroke explosion out the exhaust valve instead of powering your piston downwards. I've seen and fixed a car that had a similar problem only it had nothing to do with timing. But still, same actual problem going on inside the engine due to other reasons. Go figure. In that car, the piston had just a nice little black spot on it where the fuel was in fact igniting, but it never really fired because there was no compressed air in it at the time of the spark. Similar problem. Just a theory!
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09:48:50 07/18/11
