[V8] no idle at start

[Scott Simmons]

Scott,

    Played welder today.  My soldering skills are getting better.  I've 
made myself an LED that will plug into the diagnostic ports.  Now I just 
need time to do it and weather that's above 50*.  Why do I hear maniacal 
laughing?

~Scott Simmons

Scott Phillips wrote:

>Scott, 
>
>In  addition to the crankshaft pos sensors, there are also RPM sensors
>that will give you the bouncing Tach issues, but will also cause the car
>to act as described. The repair manual describes them as Ignition
>Reference Sender and Engine Speed Sender. They are both located on the
>driver's side rear of the cylinder head. 
>
>The good thing here, is that they should produce some codes that you can
>blink out. And That's where I'd start the diagnosis. Before you start
>opening things up, if this "just" started happening, think about the
>things you changed (like the picture of the gunky hose)  those senders
>are back there. 
>
>Blink out the codes and let us know where that takes you.
>
>Scott  '90 V8Q
>
>
>
>-----Original Message-----
>From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf
>Of Scott Simmons
>Sent: Friday, November 17, 2006 8:09 PM
>To: v8 at audifans.com
>Subject: [V8] no idle at start
>
>Last email of the day, I promise:
>
>I'm fighting two hard-start issues.  The first is a no-start due to 
>faulty/aged crankshaft position sensors.  That I know about.
>
>The second will manifest itself here and there but today it did it for 
>at least 5 minutes.  The car will crank, the tach will bounce, the 
>engine will fire, it'll rev up to 1000 or so, come down to its idle 
>spot.... and keep going down and die right away.  Trying to restart the 
>car will produce the same result.  If I hold the gas pedal down while 
>the engine fires, I can hold the car at any rpm for as long as I want.  
>I can sit there and rev rev reeeeeev but if I let go of the gas it just 
>keeps falling and dies.  Three minutes later, car acts fine.
>
>Is this a sign of a faulty idle stabilizer?  I'll probably clean 
>whatever's the problem first, as it seems to only occur when there are 
>lots of people around to watch me sit there and have trouble with the 
>car (the sensors do this too, of course).  It's not common enough to be 
>a real problem but I'd like to fix it before it does.
>
>~Scott Simmons
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