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Re: [T3] FI Idle speed....


On 5 Apr 99, at 15:24, Latherow, Robert wrote:

> Oh my 412...I mean Fastback, the D JETRONIC (Same as the Type 4,
> curiosly enough) isn't idling down on command.

On the D-Jetronic FI the speed is controlled by the amount of air let 
into the intake manifold. The brain then just provides the 
appropriate amount of gas to go with it. If your idle is too high 
that only means one thing: there is too much air getting in. You need 
to find out where the excess is getting in.

The only leaks that count are those after the throttle valve. Look 
for hoses pulled off, or cracked or throttle valve not closing all 
the way. It is common to find many worm gear hose clamps on the large 
hoses that connect the intake air distributor to the air runners, but 
this is usually a misdiagnosis. Look for something that has really 
come loose.

Jim. 
-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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