Over heating in the sun at idle might be the electric fan. Before you replace eliminate: low coolant, blocked airflow from dirt leaves and bugs. Can also be the thermal switch is not turning on the fan. It can be faulty or just not where it belongs. Some are in the coolant stream and some are against the radiator shell. If it is one that is in the coolant it might explain your other problem. Sometimes the temp sensor is used for fan input and engine control input. The Engine Control Unit (ICU) starts out open or default mode and starts closed or active control when the engine is warm. If it doesn't get the signal to go active from the temp sensor it stays in default and the engine runs too rich (to much fuel) this results in poor performance and fuel mileage. Not really familiar with exact lay
out in a A6 but this is a general possibility.
David
--- In DoIt_Yourself@yahoogroups.com, "Tori" <fertilegrnd@...> wrote:
>
> Ive ssen them posted here so Im daring though I didnt think it was related to Home stuff.
>
> My car 99 Audi A6 gets hot when idle in the sun. So after a few poor attempts at analysis by the pros, we've decided maybe its the auxillary fan. Does anyone have any ideas? Im well aware by now of the mechanic ruse to fix one thing after another without fixing problem. Doesnt bring a repeat customer.
>
> Also, in my day, few short years ago, I would rev the gas from zero, not to speed off, but to get somewhere quickly. Well whatever runs that revving has faltered. As I can absolutely no longer rev it. It instead putters from stop. The first idea was axle?, then driveshaft?, and baffle? Here again, any ideas?
>
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