THe interior temperature sensor on my E28 has the loudest sucking sound! I have driven the car for over 180,000 miles and never heard anything like this. Ms last E28 had 266,000 + when it was T-Boned but I never heard this sound. Any ideas? Thanks, Peter
There is a vacuum hose that attaches to it and then fits onto the underside of the intake manifold. Perhaps it's become disconnected. More info here: http://www.mye28.com/viewtopic.php?t=84578
It's leaking or disconnected - or the restrictor that's supposed to be in the line is missing. The sucking is normal. It IS a vacuum line, after all ...
Thanks for the info. It is connected and sucking through the correct orifice. I think it must be the restrictor that is missing, as it sounds like a vacuum cleaner. I have not removed the unit to check on what is there or not there. I know the new replacement is over $220 but maybe I can get it from Bavarian recycling. Any other thoughts?
Stay away from Bavarian Recycling. Go to mye28.com and post a WTB ad and you will likely be able to buy piles of them for a pittance from one of the many board members that part cars out.
Paul may correct me; but I think the restrictor is out near the manifold, not near the sensor. I would agree that sensors are a dime a dozen because I've never seen one go bad. I sure as hell wouldn't pay over $200 for one.
I think CR is correct about the position of the restrictor. I have seen them "go bad" but usually in conjunction with being dunked in oil, fuel, or simply being broken during removal or handling.
