Thank you for the answers! I have owned it about three years. I guess it is possible that some unfit chemical has been used in MAF's cleaning, but I cannot know for sure. About a year ago I changed the O2 sensor, and as I recall it, after that the running rich started. I just ordered a new sensor ...

Is that kind of "bubbling" on MAF normal? See the picture. Can that be a reason for the car running rich? Oh, and, by the way, these bad MAF signal numbers can tell that the MAF harness or the wire is bad, am I right? Terminal 4: 0,08 V; terminal 3: 0,02 V; terminal 2: 1,43 ohm; terminal 1: 0 ohm ...

Oh, there was an answer to the question about the fitting of Motronic MAF harness to Jetronic in here: viewtopic.php?t=90421. They do not fit. So, sorry for that question then.

More updates: I tested the signal of the RPM sensor and it was within the spec: 270 ohms. Right? However, the harness did not give any reading. Should it? The fuel pressure gauge arrived, and I tested the fuel pressure, and it was 32 psi, which is too low, as I have understood it. I also tested the ...

Hello Denmark! :D While we are waiting for comments, I'll give more info. I just measured signals from the TPS harness, and got the following (as the harness is as it is when unplugged; in other words, as it is "upside down"): Left 0.32 volts; center 0.37 volts; right (the ground) has continuity ...

Greetings!

First of all, I love the respectful atmosphere of the Forum of the Matthew's Volvo Site and the DIY spirit here. It is enjoyable to read the forum posts and to discuss in this forum (although I have not discussed much).

Now, to the actual issues; and I appreciate the time you guys take ...

In the old days they knew how to make cars look good.

Yes, it seems that 850s have these variations.

Finally, I replaced the breather system. The first time I have ever done it. It was a learning process for sure. I had already ordered the pcv kit before I started the job. The breather box of this new kit had the two ports on top of it, so I blogged ...

About the little cut hose, it does not have anything to do with the breather box. Someone has accidentally dropped it between the intake manifold and the engine.

My box is in other ways similar to the box behind the link except my box has only one port on top of the box. The part number: 6842718.