EFILive6 question
Thread Starter
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
EFILive6 question
What is FUELSYS-A and FUELSYS-B? What do they monitor. I assume it is fuel system status, but what does that mean? The gauges go red from time to time and report OL-Drive. Haven't found an explaination at EFILive's website, or in the help. 
Burning Brakes
Joined: Dec 2001
Posts: 1,054
Likes: 0
From: Mt. Juliet TN
St. Jude Donor '05
Re: EFILive6 question (ArKay99)
They monitor whether the car is in Open Loop or Closed Loop.
Closed loop is when you are cruising around town and your AFR is being monitored by the 02s so the car can attempt to keep a 14.7AFR. Your LTFTs(Long Term Fuel Trim) should be in the -1 to -3 range here or there abouts. You want them to be negative in closed loop so when you go to WOT then they will change to 0. When you go to WOT, then the car goes into Open loop and no longer communicates with the front 02 sensors and just 0s out the LTFTs.
Closed loop is when you are cruising around town and your AFR is being monitored by the 02s so the car can attempt to keep a 14.7AFR. Your LTFTs(Long Term Fuel Trim) should be in the -1 to -3 range here or there abouts. You want them to be negative in closed loop so when you go to WOT then they will change to 0. When you go to WOT, then the car goes into Open loop and no longer communicates with the front 02 sensors and just 0s out the LTFTs.
