I already did that as well, two or three times at that.
Do all 850 models have a fuel return vacuum line coming off the intake, because mine doesn't and was wondering if that was normal?

Alright guys here's an update, check the codes again the other day and got the following: idle air control valve stuck open, idle air control valve stuck closed. Put a new iacv on it yesterday, but now it idles too high, so I tried adjusting the idle screw back and now it's not even touching and the...

Will the PCV system being clogged cause it to run like shit?

I really don't think it's compression either. Yesterday while driving it, it was completely fine and driving normal; but as soon as it hit that point to where everything was warmed up then it felt like something was holding back it's full potential. First gear pulled alright as well as second, but e...

I also just changed out all the ground cables and the power wire from the alt to the battery all with 1gauge wire.

I've already checked the vacuum lines and just ordered a new iacv last night cause I know mine is shitting out.

Alright, well I guess I'll go buy a compression test kit.

No CELS when I checked the other day.

Alright guys, as the title states I have a 1996 Volvo 850 GLT with an M56 trans. I've had a problem of a rough idles and cutout or the car stalling after it warms up. Sometimes it idles down low enough and makes the oil light come on, but as soon as the rpm's go back up the oil light goes off. I tho...

URO = POS