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Been there, hence if there is a air leak I can’t find it, the intake on these, bolts in vertically and there is a 2 parter to it where it comes apart in half. Which also sits vertically. I’m running out of cans of brake cleaner and carb cleaner, lol

If it’s an air leak, I certainly can’t find it. The intake on these is hard to do a leak test without a smoke machine

No codes to clear, I have reset the fuel trims, and a idle volume relearn for throttle body as well.

Im unable to record, so as it stands, Ltft is -5% and stft is -12% at idle and at 1500 rpm’s ltft is 0 and stft is -18%. Upstream 02 sensor is oscillating normally from .03 volts to .88 I put a new one in, and down stream 02sensor is at 0.16volts constant.

New maf and plugs, so new 02sensor comes wed.

Sorry guys, stft is at -10% and no more blips going - 100% also downstream 02 sensor is fluctuating as well although I swear the stft was positive yesterday, only thing I did was take out pcv and clean it. And check gap of plugs which were off . Changed gap from .47 to .44

Maf and ect sensors are good and reading correct data.

Yes I have checked everywhere for vacuum, is it possibly a lazy 02 sensor?

Hello all, nissan 06 xtrail 2.5l. Trying to figure out a issue with these fuel trims at idle. Ltft -10%Stft +8 to+13% with a short blip every 10 or so seconds of -100%. Upstream 02 sensor oscillates but hangs out more in low voltages even going below .1 volt to .04 volts. Thoughts? Symptoms are...