Hard starting Audi
 

This '91 - 200 Turbo non-Quattroalways starts, but not without some reluctance. </P>


Symptoms are as follows:</P>


1)Under normal conditions (any weather temp &gt; 5 degrees C)after resting for more than 20 minutes, the engine usually requires 20 to 40 seconds of starter cranking before productive or sustained ignition firing begins.</P>


2) Once firing commences and the starter is disengaged,firing isrough and uneven. Quite often, a little modulating or outright revving, for 10 to 30 seconds, of the accelerator hastenes the arrival of smooth, steady-state idle.</P>


3) When air and engine temps fall below -17C or 0F, the car will start, like all the other CFI -Audis/VWs I've owned, within the first 2 or three crankshaft revolutions. Curious enough, a smooth idle occurs right away (akin to my former and current Audis).</P>


4) Like deep cold-weather starts, if the vehicle has remained at rest for more than 3 or 4 days, regardless of air temperature, it fires (within just a few seconds of engine crank) and idles almost instanteously. This was observed after returning to the vehicle left in long-term parking at the airport following out-of-town business or vacation.</P>


5) Some, not all, rough starts exhibit a littlemore than normal white/blue exhaust smoke. The engine consumes about one quart of oil for every oil change (see below).</P>


Maintenance is regular, it receives new motor oil and filter every 3 to 4k miles and the air filter is changed each year before VA-state inspection, which it routinely passes. </P>


Previous check-ups confirm that fuel pressure remains even at the injectors prior to starting. Can't confirm cold start valvesince deep-cold or long rested starts are normal.</P>


Any ideas or observations and remedies of similar aberrant behavior would be greatly appreciated.</P>

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