Won't idle when cold
09-23-2009 | 03:25 AM
#16
Three Wheelin'
Joined: Mar 2006
Posts: 1,813
Likes: 0
From: San Diego / Las Vegas
Bill,
In your 85, we have a different ISV than the S4 cars (not that it is any better). For our OB's we do NOT have to remove the intake. Simply take off the maf and you will see it under there. I cna be removed and unplugged and replaced without an intake removal.
BTW- our OB ISV's are available directly from Roger as a Bosch for $120-$125!!
In your 85, we have a different ISV than the S4 cars (not that it is any better). For our OB's we do NOT have to remove the intake. Simply take off the maf and you will see it under there. I cna be removed and unplugged and replaced without an intake removal.
BTW- our OB ISV's are available directly from Roger as a Bosch for $120-$125!!
09-23-2009 | 03:32 AM
#17
Addict
Rennlist Member
Rennlist Member
Joined: Oct 2003
Posts: 16,591
Likes: 1,700
From: Gone. On the Open Road
Failure to idle when not-warm is a common symptom of a bad Mass-Air Sensor. You can send your MAS to Kevin at www.injectionlabs.com for testing (free except for shipping.)
Your '87 does not have a warm up regulator other than the microcode in the LH that depends upon the output of the Temp-II sensor.
Unlike the later cars, on an S3 the ISV can be R&R'd without removing all of the intake. But, if you are removing the intake to replace breather hoses, then yes, you will find the ISV. Replace the (all of them) o-rings in the air guide and throttle body also.
Your '87 does not have a warm up regulator other than the microcode in the LH that depends upon the output of the Temp-II sensor.
Unlike the later cars, on an S3 the ISV can be R&R'd without removing all of the intake. But, if you are removing the intake to replace breather hoses, then yes, you will find the ISV. Replace the (all of them) o-rings in the air guide and throttle body also.
