I totally agree with what Herb said about your breather box. Test it for obstruction first before going after it. My car has 252K and the breather has never been out.

Use the procedure in the 700/900 FAQ. Here it is from memory... Remove flame trap and attach hose to lower flame trap hose which goes to breather box. Or alternatively you could remove this lower hose (can be a b*tch to get back on however!) and attach the hose directly to the top of breather. Remove oil cap and blow through hose. If you can feel any air at oil cap your breather is still okay...

IMO - The throttle body is good maintenance. However, I would only do the IAC if you felt it needed it. Why fix what's not broke? You could be opening up a can of worms! Same with the breather....

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90 244DL 252K - original engine/drivetrain :)

I did this with my 1990 740 last year. You know the thin red tube that allows you to direct the spray from the cleaner? Well it shot off and vanished inside my intake manifold. I had to remove the TB and fish the thing out. Just a warning. Cleaning was easy despite that "little" issue.


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Six Volvos: all wagons.... 1972 145S, 1976 245 DL, 1983 245 GL, 1986 740 GLE, 1990 740 GL, now a 1995 940. Number 7 (a 1967 122S Wagon) is on the way.... Who needs a sedan, when you've got storage compartments in a wagon?