open loop closed loop ?
Thread Starter
Drifting
Joined: Jan 2003
Posts: 1,894
Likes: 3
From: Reading PA.
open loop closed loop ?
How do I test to see if my car is running in closed or open loop? It's a 90 auto Also my O2 sensor is located in my Y pipe right after the collector. Is this too far back? THANKS FOR THE INFO Pipe
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
I have a hand-held scanner I use on my 96, but it's OBD2, I;ve never had to scan an OBD1 computer but I would bet that a decent scanner would be able to monitor when your computer switches from open loop to closed loop.
Team Owner
Joined: Jan 2003
Posts: 20,322
Likes: 248
From: Summerland B.C. Canada
On my 86 you can jump the "A" and "B" on the aldl and drive in field service mode. If the SES light flashes once every second, it's in closed loop. If it flashes once every 2 1/2 seconds it's in open loop. Maybe someone can verify if it's the same for a 90.
