closed loop
Moderator
Joined: Jan 2001
Posts: 56,992
Likes: 2,741
From: Virginia
Check the codes from the computer. If you have no codes, you are going into closed loop, since this is what the computer tries to achieve each time the engine is fully warmed up. If for instance you have a oxygen sensor code, you are not going into closed loop since this is the main sensor for that mode of operation.
