Re: [DML] vacuum leaks

[Martin Gutkowski <martin@xxxxxxxxxxxxxx>]

I don't want to split hairs over this Bill as it's probably of little 
interest to most people on this list. HOWEVER

You wrote:

" all fuel metering devices (including carburetors) are unable to 
deliver a proper fuel/air mixture when unmetered air is sucked into the 
engine through a vacuum leak"

This is quite simply wrong as most engines now use MAP/MAT sensors to 
calculate air density. I was careful to keep -my- terminology correct by 
saying

"These engines do not suffer mixure problems resulting from vacuum leaks."

You will get a high idle if the vacuum leak exceeds the idlespeed 
control system's ability to lower the air entering the engine.

>But that is a moot point on this list -- the PRV is very susceptible
>to vacuum leaks, which is what owners want to know about. Virtues of
>2005 model vehicles (if any) won't help a DeLorean owner with
>wandering idle or flat acceleration.
>  
>
Actually 1984 onward Renault engines, and the Eagle Premier engines you 
guys have (which -are- Renault lumps) are all MAP/MAT sensed. Feel free 
to go read up in the TEC3 or SDS manuals, and you'll learn far more than 
you expected on this subject - I certainly did!

Martin





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