warm start - no idle issue take 2

Steve Scalmanini sscalmanini at yahoo.com
Mon Jun 7 05:15:03 EDT 2004

Hi Nat, 

I forgot I had this but ran across it tonight preping 
for the 195K service.  Came from Scott last year.  
Haven't tried it yet but prob will in the next few weeks.  

You still havin' the problem?  I haven't for a few months.  

Ukiah, CA 

----- Original Message ----- 
From: "SJM Autotechnik" <sjmauto at comcast.net>
To: "Steve Scalmanini" <sscalmanini at yahoo.com>
Sent: Wednesday, September 17, 2003 7:35 AM
Subject: Re: Phone Question....


One thing to try, is to  remove the idle stabilizer valve but leave the 
electrical connector on the valve and then run the ECU Output tests and 
step through the tests until it cycles the ISV on/off while you spray some 
carb cleaner through the valve. I have seen them stick from time to time 
from carbon bits that get stuck or embedded into the rotor valve face.

It is also a good idea to remove the vacuum/boost line from the fuel 
pressure regulator under the intake manifold and make sure fuel isn't 
leaking past the diaphragm into the vacuum port hose.


At 11:12 PM 9/16/2003 -0700, you wrote:
Thanks for your note, Scott,

It won't idle for the first minute or so after a hot start.
Some days (read recently) it's constant, some days it's OK.
If I keep the RPMs above idle with the pedal for a minute
or so, then it idles fine until I need to restart it later.

The problem started again last week some time.  I had the
problem 2 1/2 years ago and it went away on its own.  My
mechanic then (via telephone) thought it sounded like the
fuel pressure regulator but the problem fixed itself before
I had them actually diagnose it (and now I've moved 150
miles from them, and he sold the shop anyway.)  So the
FPR, and also the Idle Stabilizer Valve, have never been
changed (at 188K miles).  I changed the fuel pump last
year, however, from the original to the narrow-body VDO,
if that makes any difference to you.

What do you think I should test or just replace first?


Steve Scalmanini
sscalmanini at yahoo.com
Ukiah, CA
(707) 391-5853

Oh, it's a '91 200Q (20V turbo; 3B engine)


warm start - no idle issue take 2
feelstranger feelstranger at hotmail.com 
 Fri May 14, 2004 

Ok, I thought I might have it figured out but, no.
I have searched the archives and found several 
references to this problem but no solutions posted.  

So,  any help here would be appreciated.  
A description of the issue...

This has only started as the weather has warmed up 
and is an issue that the PO told me he had in hot 
weather and here it is.  After a short drive and 
the car is warm, if I stop at a store or something, 
when I start it up it starts *as normal* but then 
stalls immediately if I don't get on the gas.  Even 
then If I let off the gas while maneuvering in the 
parking lot it will stall.  Once I get on the road 
for a few seconds (?)  it won't stall at say the 
next light or stop.  It will be fine until the next 
shut off/start cycle.  And this is only during warm 
weather - like 70F +  

What is going on here?


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