[V8] Restarting when warm

[Dustin Carter]

So I decided to take the car for a drive tonight to see if it would stay running.
Prior to the drive I let it idle in the garage to try heat soaking the sensors.  It
worked as the car would not restart.  I let it cool a bit and then squirted some
water around the sensors to cool them off a bit.  This worked and the car started
and ran just fine for the test drive.  I got home, shut it down and let it sit for
a bit less than a minute.  It started back up.  So I left it running in an attempt
to again heat soak the sensors.  Every time I shut it down, it would restart.  So
I shut it down and let it sit for about 2.5 hours.  Now it refuses to start.  The
codes still indicate that the crank angle sensor is bad.  I'm also seeing a 2342
oxygen sensor code, but I think it's unrelated...

Is the starting when hot, but failing to start when cool still indicative of a
bad hall sensor or should I start looking into other possibilities?  I have a new
sensor on its way, but would like to get started looking into other possible
causes as soon as possible, if necessary.

Thanks,
Dustin



-----

Sounds like it to me as well.  Having it in the "no-start position" is a
better place for the bad one because it only needs to be cool to let you
start the car.  If the problem occurs after only a short stop, you can pour
water just inboard of the driver's side distributor cap to cool it off to
get it started again.

Ed

> -----Original Message-----
> From: v8-bounces at audifans.com 
> [mailto:v8-bounces at audifans.com] On Behalf Of Dustin Carter
> Sent: Wednesday, May 31, 2006 7:11 PM
> To: v8 at audifans.com
> Subject: [V8] Restarting when warm
> 
> 
> Hi Guys,
> 
> I've got a bit of a problem.  Sunday I was headed on a trip 
> up to some wineries when all of a sudden the car up and dies. 
>  Up to this point it had been running great.  I was kind of 
> hot footing it through a nice twisty section and had just 
> backed off and resumed a more appropriate pace when the 
> problem occurred.  I had a problem with these exact symptoms 
> a while back which turned out to be the fuel pump.  So I took 
> a guess that this might be the case again.  After rolling the 
> beast off of the flatbed I decided to see if it would start.  
> Much to my surprise and thoughts of ensuing unpleasantness, 
> she started right up.  I pulled it into the garage, shut it 
> down and tried to start 'er again...started just fine.  So, 
> Monday rolls around and I decide I'd better see if a trip is 
> possible as I'll have to leave my house at 4:30am Tuesday 
> morning to take my friend back to the airport.  Started and 
> ran just fine...for a little while.
> 
> Observations while trying to get back to the house:
> 
> 1. Engine seems really warm
> 2. Upper rad house is very hot, lower is quite cool
> 3. Pulling codes reveals a 2111
> 
> I pulled the t-stat out to verify that it would open in a pot 
> of boiling water...it does.  I removed the speed and crank 
> angle sensors, cleaned them up, tested resistance (1k seen of 
> DMM) and reinstalled them.  I swapped one for the other when 
> installing them.  Now the car seems to run just fine...at 
> least in the garage (I haven't taken a road test as yet).  
> However, it refuses to restart if I shut it down and the code 
> is now registered as 2112.  I think that is exactly what I 
> wanted to see.  So I'm thinking that I have a bad sensor 
> (same sensor in 2 locations give 2 codes).  Do you guys think 
> this sounds right?
> 
> Thanks,
> Dustin
> '90 V8Q


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