Thread: EFI Idle issues
View Single Post
sjf911 sjf911 is offline
Registered User
sjf911's Avatar
Join Date: Dec 2006
Location: Idaho
Posts: 5,624
That is a very nice setup, Looks a lot like one of Chris's at TurboKraft. That is your idle control valve (ICV).
I would suspect your ICV or the programming for it is misbehaving. You need to be able to look at what the ECU is doing when the car stalls (is it even entering closed-loop control?) and document what the specifics are of your idle control algorithm (idle advance, ICV frequency, PID values, entry criteria, etc.). It sort of looks like a 2-wire ICV which I know others on the MS forums have had issue with in a PWM mode. The stock Carrera is a Bosch 3-wire which I have used without issue in this mode.
Do you have any way of logging your ECU data or interfacing with it using a laptop? If not, you could remove the ICV and thoroughly clean it or empirically replace it and if that doesn't fix it then you will need to find someone who can work with your specific ECU to diagnose the issue.
Sapere aude
1983 3.4L 911SC turbo. Sold
Old 10-16-2011, 07:06 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)