I have some software and connector that allows me to monitor the engine and check codes.
I hooked it up and was monitoring the engine on the way to work today. I noticed several times that the long term trims did not match.
Trim 1 would read 5.7% lean
Trim 2 would read 1.4% lean
Then at the next update it would go back to 3% or so on both and hold for a few updates. Then it would go back to a different readings again. Then next update back to matching.
I also noticed on the short term that a lot of times bank 1 would be leaner than bank 2.
Is this normal or is this indicating a potential problem and could possibly be why my highway fuel mileage is around 17 to 18 at 74 mph cruise set.
bank 1 and bank 2 are always going to be a little different.mine is the same way,i have been monitering using my dashhawk.the trims are the ecu correcting for minute differances inharent to all engines.as long as your ltft are +/-8to10% your good.