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Problem with Audi A8


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Eka1921
New User

Mar 26, 2016, 7:04 AM

Post #1 of 6 (793 views)
Problem with Audi A8 Sign In

Year of vehicle 2000
Make of vehicle (Ford/ Chevrolet) Audi A8
Model of vehicle ( Taurus/ Cavalier)
Engine size (2.0/ 5.7) 3.3
Mileage/Kilometers 240 000

When i'm driwing and give him more power he just turn of,i am Mechanic and i don't know what is the problem please help


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 26, 2016, 7:17 AM

Post #2 of 6 (781 views)
Re: Problem with Audi A8 Sign In

OK - Is that miles or KMs? Really doesn't matter and I personally don't have any specifics on these cars.
It's known to me as a performance vehicle which also means it likely has a WOT (= Wide Open Throttle) cut out for the compressor for maximum available power for the most power when requested.
About all I know of are using info or the intake manifold vacuum directly or converted to electrical to tell the compressor to shut down.
When asking for WOT manifold vacuum is close to zero so a vacuum leak in the wrong place would send along wrong info and is what I'd look for first,


T



Eka1921
New User

Mar 26, 2016, 7:22 AM

Post #3 of 6 (778 views)
Re: Problem with Audi A8 Sign In

Kilometers


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 26, 2016, 7:28 AM

Post #4 of 6 (774 views)
Re: Problem with Audi A8 Sign In

That helps. Same suggestion. Look for hoses and items on intake manifold that either directly or with a rubber hose(?) are in fact in good shape. Items may just plug in so connection(s) must be good.
It's just the first thing to at least rule out. If you find vacuum items in tough shape, brittle, cracks, or bloated from oil or anything wrong replace them pro-actively anyway as those things don't last forever,


T



Eka1921
New User

Mar 26, 2016, 7:48 AM

Post #5 of 6 (769 views)
Re: Problem with Audi A8 Sign In

 


(This post was edited by Eka1921 on Mar 26, 2016, 8:11 AM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 26, 2016, 8:13 AM

Post #6 of 6 (763 views)
Re: Problem with Audi A8 Sign In

This AC can be shutting down for any assortment of reasons.

The first thing that needs to be done is a complete evacuate and recharge to get the proper amount of refrigerant into the system as certain pressures can be shutting the system down from either high or low extremes at higher RPM.

From there you can find out if there are any other issues while monitoring the pressures. You would also need a scan tool to examine the return signals from pressure sensors for accuracy.



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