I have a 1ga with linkv3, 650 injectors, 16g ect...no boost leaks, engine trouble that im aware of. link is only tuned with the necessary info like injector size and all the automatic global fuel calculations, 02 type, gauge type, but that's it. me and a buddy have had a long road getting link to work in the first place, but theres still some issues that need to get worked out. the car idles pretty smooth but sometimes it tries to die after I come to a after driving. It drives pretty smooth under cruzing but when I decel the car will buck and backfire. and im getting a little smoke out of the exhaust sometimes that smells kind of like charcoal. also the aem wb gauge doesn't match what link says the estimated af ratio is. now I have a faint feeling that my 02 sensor might need to be replaced but im not sure how to tell, I know its old and its been abused hard but not sure how to test it or if maybe my settings are wrong. I will attach a cruze and idle log, I logged just about value I could think of in hopes that it might help. towards the end I did a very short maybe 2sec 2nd gear pull just to see how it felt and as soon as it hit boost I backed off but it felt good and didn't buck or feel strange. any insite or help reading my log would be very helpful, thanks in advanced.

By any chance are you venting your BOV?
Also I would go to ecmlinks website and watch all of the demos they have on there. In short if your wideband is not matching your AFREst you need to mess with your Mafcomp sliders until they match throughout the rpm range

You should post a log of idle only (engine at operating temperature).The beginning of the log where the engine is at idle STFT is calling for a 12 % fuel increase, so 210 ms of global dead time is not enough . Raise global dead time until STFT hovers within 3%.

Marchev said:

By any chance are you venting your BOV?
Also I would go to ecmlinks website and watch all of the demos they have on there. In short if your wideband is not matching your AFREst you need to mess with your Mafcomp sliders until they match throughout the rpm range

Click to expand...

the bov is recirculated, ok thank you for the tip[DOUBLEPOST=1410470462][/DOUBLEPOST]

jery1234 said:

You should post a log of idle only (engine at operating temperature).The beginning of the log where the engine is at idle STFT is calling for a 12 % fuel increase, so 210 ms of global dead time is not enough . Raise global dead time until STFT hovers within 3%.

Click to expand...

ok thank you, i don't even know what stft is or how to adjust it, i need to catch up on some reading

Before anything I would make sure that wideband is setup to read right as that is half the problem here... for reference AEM gauges when the sensor start to go out will read full lean as well when you unplug the sensor most default to 14.7:1

There is no way that 1.12 volts is Stoich Depending on the wideband this should be in the range of about 2.4-2.6 volts in the middle of the range Id try 2.53 to start you can see buy just running a log with the sensor not hooked up as I was saying.

This should be helpful getting that lined up right 0-volts = 0.68 lambda 5-volts = 1.32 lambda are the most standard settings to start with for most AEM gauges. CLICK HERE

ok thank you ill try that

Do you have the white wire connected to the ecu? Make sure it's the white and not the blue. Stft stands for short term fuel trim, ltft stands for long term fuel trim. They show how much fuel the ecu is adding or subtracting I'm order to achieve the desired a/f ratio.

I'll double check