WoodsWagon Posted December 19, 2006 Share Posted December 19, 2006 I was accelerating up a long, steep hill with my car, and I started misfiring and loosing power. There was nowhere to pull over, so I downshifted and revved the piss out of it to get to the top. It's now consistently running on 3 cylenders. If you unplug the #3 injector, the engine beat doesn't change. It's getting spark, its getting fuel, but it has no compression. As in 3psi. The other cyls are up round 150psi continuous cranking. I get a wierd thing in the exhaust, if you hold your fingers infront of the tailpipe, usually they are just puffed against. Now, its puffed, then sucked back in the pipe, then puffed out again. If you remove the #3 sparkplug and run it with it out, this sucking in the tailpipe is gone. I think I either burned an exhuast valve good, or it's stuck open. Link to comment Share on other sites More sharing options...
monstaru Posted December 20, 2006 Share Posted December 20, 2006 take the head off and find a broken valve. Link to comment Share on other sites More sharing options...
WoodsWagon Posted December 20, 2006 Author Share Posted December 20, 2006 I took the valvecover off, first thing I noticed is that one of the exhaust springs is on upside down. (the engine was assembled in kinda a hurry) I took off the exhaust manifold, and feeling with a piece of wire, there's about an eigth of the exhaust valve missing on the valve that had the flipped spring. So, I get to take the head off tomorrow morning. Could the extra inertia of the flipped spring have shattered the valve? The springs are variable rate, wound tighter at one end, which is next to the head, and looser at the other. Link to comment Share on other sites More sharing options...
NoahDL88 Posted December 20, 2006 Share Posted December 20, 2006 i don't think putting in the spring upside down is gonna shatter your valves, theres probably a correct way that should be followed, but its not gonna compress the stiff end just cause its upside down. Fingers crossed that its not a beaucoup dinero problem. Link to comment Share on other sites More sharing options...
WoodsWagon Posted December 26, 2006 Author Share Posted December 26, 2006 I got the head off, the valve is burned good, it melted and kinda has slag hanging back into the port side of the valve. Seat is a bit messed up. I'm debating weather to repair this head or swap on a spare. Link to comment Share on other sites More sharing options...
WoodsWagon Posted December 27, 2006 Author Share Posted December 27, 2006 Here's the valve: Big ol' nasty chunk missing. Link to comment Share on other sites More sharing options...
msmithmmx Posted December 27, 2006 Share Posted December 27, 2006 You need one? I have a 90 2.2 sitting on a engine stand. Link to comment Share on other sites More sharing options...
NorthWet Posted December 27, 2006 Share Posted December 27, 2006 Here's the valve: Big ol' nasty chunk missing. That's one of them new-fangled ported exhaust valves isn't it??? Must be good for at least 100hp. Man, that is one nastified valve! Link to comment Share on other sites More sharing options...
WoodsWagon Posted December 27, 2006 Author Share Posted December 27, 2006 That's one of them new-fangled ported exhaust valves isn't it??? Must be good for at least 100hp. Man, that is one nastified valve! It was good for an extra 3psi.... of total compression that is. I can buy a spare valve for 16 bucks, and have a seat grind done to get the head back, or I can swap on a spare head I have. Link to comment Share on other sites More sharing options...
NorthWet Posted December 29, 2006 Share Posted December 29, 2006 Oh, yeah... what does the valve seat look like??? (pics?) Link to comment Share on other sites More sharing options...
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