260B4U

iTrader: (4)

my ltft's are +25% whats the deal after the most recent tune

flame

iTrader: (13)

With that amount of information the only answer is the tune is not right

BLK02WS6

iTrader: (2)

Definitely need more info... when are they +25%? idle only? everywhere? any mechanical changes made lately? Have you checked it for vacuum leaks? Who tuned it - someone who knows what they are doing?

crainholio

iTrader: (2)

If you tuned it yourself, roll back to your prior tune.

If you had it tuned, take it back to the shop.

Golf&GM

iTrader: (22)

If you have a mild bolt on setup or less check for intake, exhaust, and vaccum leaks. I had the same thing happen to me and it turned out to be a leaky MAP sensor. Any extra air getting in after the MAF throws the O2 sensors off.

99ws6ls1

when are checking them?? you should cruising between 1800-2000 rpm's. i go on the highway and sit at about 60 mph and take the average ltft after about 5 minutes of reading the log. then tune my injector slope to that. after i tuned my car my ltft's were about 7 percent. so i tuned my injector slope -8 percent. they now sit at about -1. you want them to be in between 0 and -2 percent.

ctd

iTrader: (1)

With all the information provided I have to agree its busted.

Or for a good answer you have to ask a good question. Sometimes we don't know what question to ask, so if you provide a log & tune? I'm sure many good questions & answers will result.

Old Geezer

iTrader: (3)

^^^

Pretty much how it works.

Dskeet6

iTrader: (20)

when you say injector slope I hope your talking about your VE table.... not the injector flowrate table.

260B4U

iTrader: (4)

well my ltft is 25% on bank 2 only while bank 1 is about 12-16%
only at idle ..... both goto to 0 once im moving any ideas?

ND2RACE

Needs to be scanned, possible dead O2 sensor, tune not right, vacuum leak, ect.

Take it back to your tuner, this is how you'll find out if he's any good or not.

crainholio

iTrader: (2)

You've told us nothing about your engine, modifications, etc. There's an idea.

260B4U

iTrader: (4)

mods are in the new sig