Question about 1991 Audi Quattro
Seems like idle drops the car stalls
Posted by Anonymous on
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Posted on Jan 02, 2017
It's the brake pedal switch. There is a switch down on the pedal arm that closes when you press the pedal down, and sends a sensing voltage to the controller, telling it the brakes are applied. This allows the transmission lock to disengage so you can shift out of Park. When that switch fails, the lock won't disengage. You need to replace that switch and you'll be fixed.
Posted on Jan 18, 2009
SOURCE: audi a4 2.8 quattro idle valve
there is no carburetor on these cars , the idle air control valve is an easy thing to change it is on the passenger side near the firewall on the back of the engine buy the new one so you know what it looks like it has a wire connector on top 2 bolts and a gasket behind it just unhook it unbolt it remove the old gasket install the new one with the new gasket and plug it in simple there is no sealer required
Posted on May 09, 2009
Could be thermostat this regulates the water flow around the engine to keep it cool sounds like it is sticking open when water gets hot!!
Posted on Jun 09, 2009
mcdevito75 here, A vibration while idleing is not really normal, a rough idle could be many things, wrong octane gas, dirty gas filter, dirty smog controls. Have your local shop take a look for you.
Posted on Jul 13, 2010
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