940 Running So Bad :(

[MiniMotoSX]

Hey guys so lately my 940 has been running so horrible. The idle is ridiculous. It was idling at about 500rpm at startup and even after it had warmed up. Then also it's pretty hesitant when I give it some gas from a roll or from a dead stop. So I went and turned up the idle a bit. Now it seems like it is doing even worse from stops and rolls. I'm not sure what the problem is. I had a check engine light on for a while. It was 212 and I'm pretty sure that was the O2 sensor. So i changed that and the code went away. It periodically comes on though and I checked it and it gave me a 212 again. But then it'll go off and stay off for a long time. I just can't figure this one out. Any ideas? Could it be something with the timing or ignition? Btw all the pistons are firing.

 

[Donny]

It probably needs a throttle service/adjustment and a good ole fashioned chinese water torturing (AKA seafoam).

 

[TVS]

Sounds a lot like an inlet mani gasket.

 

[MiniMotoSX]

Now that I'm thinkin about it, it sounds like it could be the intake manifold gasket. I'm going to hook up the vacuum gauge tomorrow hopefully

 

[MiniMotoSX]

Well if anyone was wondering I actually put the bottom of my airbox back on and the car is running ten times better then it was.