Hello everyone
I have had an issue with bank 2 having a 15 % difference in the kamrf. I have checked for exhaust leaks,intake leaks,i changed the 02's and so on. Does anyone have any ideas on what else to check. Thanks
A difference of 1 to 3 points between sides is not all that uncommon
A difference of the magnitude you speak of is usually something mechanically
wrong like sensor, sensor harness, main harness feeding sensor, e leak,
v leak and the like
Is the difference the same at all points in the range of Closed Loop?
The difference is at low rpm( cruising ) low load. I have noticed when the engine is making the most vaccum the fp is like 32#'s this is when it seems to do it worst. I was wondering if my injectors may have a problem. Thanks
Thanks i did swap the 02's made no difference. This week when i get a moment i will swap the 02 extensions. I really dont know what else to do except pull the lower or replace the injectors, Don't know what else to look for.
First off - Look at short term trims with adaptive off - not sure what short term trims are called in TwEECer language - see if the trims are off bank-to-bank at idle, then see if they are off at higher RPMs with some lod on the engine. That will tell you more. If they are off at idle and low RPMs but even out at higher RPMs, it is 99% an undiagnosed exhaust leak ahead of an 02 sensor - it only takes a pinpoint leak to do this. It will allow atmospheric 02 to enter and screw up the readings. At lower RPMs the 02 will be a higher percentage of the total gas volume in the pipe as opposed to higher RPMs. The 1% other chance is a vacuum leak on only one bank.
If that's not is, swap injectors bank to bank and see if the trims follow the injectors. If they do, have someone diag the bad injector with a Snap-On Verus or Modis - if they know how to use it they can figure out what injector is bad. If this is the case - do not go to WOT with it...
thanks i still don't understand how to tune do to the stft and ltft. I am tuning with a Quarter Horse. I may have a bad header but not sure how to make sure seems to sound funny on bank one but i can't find a leak or carbon tracks any where.