Re: Vacuum leaks.....

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <m0zhmgW-000Jt5C@post.cis.smu.edu> rjandrew@post.cis.smu.edu (R Justin Andrews) writes:

> I was bored and was going through the archives ...

When I get _that_ bored I usually go and break something on the car so
I can fix it.

> Eric Fletcher had stated that all of the Audi i-5's even NA's
> were supposed to stall with the oil cap removed. well....
> all of my early i-5's ui've owned '84 5ks '84 cgt '86 cgt
> and the current '86 4kq do not do this do they all have vacuum leaks???!

No, my JS engine runs with the cap off - the MB will not.

The difference is in where the breathers enter the air inlet system.
On the JS they're connected into the air box inboard of the filter
but _before_ the air is measured by the air mass sensor.  Any change
(e.g., opening the cap) is fully compensated for.  On the MB, they
are connected into the plenum chamber above the air mass sensor
paddle and any extra air entering will _not_ be compensated for - the
mixture goes extremely lean and stops the engine.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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