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Fuel rail?
Posted by Joe98 (more from Joe98) on Mon, 14 Nov 2005 08:25:56
In Reply to: Vaccuum Leak, Michael
[Profile/Gallery]
, Sun, 13 Nov 2005 16:39:47
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I know in my car, the rush of fuel through the metal rectangular fuel rail causes a sound much like a vacuum leak. See if that's what you're hearing, and if so, that's normal.
In reading some of your past posts, are you replacing things just because they're "old"? Many items on these cars are quite robust in design, and do not need to be replaced unless causing grief. The a/c compressor, for one, tends not to be an item of concern, whether young or old. Other than the DI cassette, most items do give warning notices before dying (then again, my DI did give me signs before it was too late). I'm only saying this to save you time and money (since parts for these cars are quite expensive).
As for the idle problem, is it just a slight fluctuation or a considerable drop in idle? Most engines will fluctuate and stumble here and there, and the causes can be anything from age, carbon deposits, tune-up needed, vacuum leaks, etc. Try cleaning the IAC (or AIC, I forget which it is on the 9K) which controls the idle. It is a small black plastic "box" directly under the TB and attached to it via a large hose. Make sure all connections are tight to this item as well. You could also try cleaning the TB and making sure all connections to it are secure. I had an issue recently where a vacuum hose going into the TB popped out along with the brass connector (caused loss of brake boost and wild high idle).
Good luck!
Joe
'98 94K
'93 900TC 136K
posted by 12.111....
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