Quote:
Originally Posted by Kingtal0n
right, I doubt its your fuel system. Just something to throw in the mix. If we rule that out, then we must consider electronics, wiring, timing, misfires, air/compression leaks.
The engine stumbles as in, misfires? If the engine mis-fires your wideband goes full lean. That sounds more like an ignition problem, coil packs, grounds, plug(s). Could even be just one single plug mis-firing.
Other than that- a mechanical problem, such as a sticking valve, can cause a stumble/misfire. Something else to keep in your mind. Any funny "metallic sounds" when turning the engine over?
If you havn't changed the plugs... do that.
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I'm no expert, but I'm pretty sure that classifies as a misfire. It jerks a bit.
I pulled the plugs a couple of weeks ago and regapped them to 0.32. They were gapped to much. Other than that, didn't look too bad. They were just showing a tad rich cuz I was running rich back then cuz my turbo elbow wasn't bolted in properly (goddamn previous owner, I HATE UUU), so it ran rich in open loop.
No mechanical weird noises, compression was at 150psi couple of weeks ago. There is a funny rattle though, which I'm 85% certain is the exhaust cuz I'm missing the insulator piece that connects the downpipe to the tranny crossmember (goddamn previous owner), and you can't hear it from the engine bay, only from the side of the car.