BrianLS1

I have access to autotap and use it about every week or 2 on my car..I always put up the ltrims and the front 02's on the screen but I don't understand the ltrims..do I check these at idle, driving down the road, or at wot and what are they supposed to be..I've also seen people(and this is what I do) just go by the readings on the 02's at wot but I would like to know more about the ltrims and what they should read at regular speeds and at wot and idle..thanks

98TAauto

iTrader: (2)

-Ltrims mean the car is running rich
+Ltrims mean the car is running lean

say they are +15 or so on average under normal driving(no WOT runs)..

you car is adding fuel to make up for the lean condition

ideal LTRIMS are -5 to +5. Most like to get theirs around -3 under normal driving

to read your LTRIMS you need to drive around normally for 10-15mins logging them.. then average them

you check your 02's at WOT and they should read .87-.96 roughly
Hope this helps a little

BrianLS1

thanks for the reply, that gives me a better understanding of them