What is an acceptable difference between banks 1 and 2 for the fuel trims? My bank one is sitting at +1.6% and bank two is at 0. I thought this was a little much but wanted to know what yall think. I think I might have an exhuast leak but I cant find it anywhere, I've searched every inch of the trucks exhaust with it running.

Chris

 

That's normal , 1.6 % is a very small amount. If it was 0 an + 10% then I would br looking for a vacuum leak or some related item

 

thanks, I'll get back on the tuning then!

Chris

 

Yup, its all good. Like Crash said if it was way lean look for a vaccum leak. But If you think you have an exhaust leak.Try tranny fluid in the main vaccum line it smoke like a **** and will be easy to find.

 

Mine are always in the negative and different. -0.8 and -8.5 once I get into the higher rpm 4K+ they both go to 0 and then when i let off the go negative and are off by 6 to 9 points.I've been told leaking injector or exhaust leak or ignition problem. What do you guys think?

 

Has it allways done this or just started? Who tuned it, Can you post or send a log file?

 

It isn't tuned perfect yet and I was told by a tuner that tuning couldn't fix it anyway, it was a mechanical problem. It started this after th 6L install. We broke a exhaust manifold bolt in the block and had to tap it. I don't know if that has anything to do with it but maybe. I am getting LT's and the exhaust redone soon so I'm hoping this will fix the issue. I do have a log from a couple weeks ago. Want me to send it to you or can I post on here? I'll try.

 

Is it still leaking though? Sounds like that might be the problem. But let me take a look at the log and tune. Timrichardson@cfl.rr.com