Fuel pressure is fine, and spark is good. Hooked up a bluetooth OBD2 reader, and monitored all the sensor values I could. But, not really sure what the values should be. - MAF at idle is 8.5 - 9.5 g/s, and ~10 g/s if I floor it (engine tops out at 2000 rpm) - Throttle values (pedal and intake) are a...

Just did a back pressure and compression test. Back pressure is good. All cylinders, except cylinder 5, tested ~125 psi dry. Cylinder 5 tested 90 psi dry, which is pretty low and 200+ wet, so there's a worn ring and/or cylinder. But, I don't think this is the problem. So, I guess I'll do ignition an...

My 2000 S80 2.9l will not go faster than 10 mph, will not rev over 2000 RPM in park, is hard to start (need to press gas pedal), and once started, stumbles on idle. Does not make any weird noises besides the stumbling. Any idea what could cause this? Codes I'm getting are: - Cylinder 2 misfire (has ...

Nevermind. It stopped because I screwed in a damper bolt without the damper on to use as a counterhold, and the bolt stuck out of the crank sprocket far enough to hit a part of the block sticking out. All's good

Just got done replacing the timing belt, cam seals, water pump, PCV system, etc in my 2000 volvo s80. After I put the timing belt on, I cranked the engine by hand almost 2 turns, then it stops just before completing the second turn. I'm guessing this means the valves are hitting the pistons? So, how...

Got it. Thanks. Looks like someone rigged it with a piece of an over-sized9 hose on the intake, slid the small hose coming off the filter box into the larger hose coming off the intake, and at some point in time, the small hose slid out of the larger one. If anyone else comes across something like t...

Just bought a 2000 s80 that needs some work (cam seal replacement, and PCV system I think), and I noticed a little bit of cut hose hanging off the intake manifold. Can anybody tell me what this hose goes to, and what it's for?