Strange problem loG inside.

[5810]

Hi, when i am in third gear and hit around 5k it feels like i hit a wall,loud pop,& alot of black smoke out of exhaust. it sounds like fuel cut but im not sure. The log below shows the dip in in O2s, and tps, but the injector pulse width stays normalWTF . This only happens on cold nights once in a while.WTF & it started when i put on my turbo back exhaust. I have done all the maint, & NO BOOST LEAK,,Boost set at 14 but creeps to 15.

My mods Are. K&N/can hack,MBC,3" Turbo back exhaust, Fuel pump rewire,Free Mods, Unhacked MAFT, After market boost gauge.

I did a search but i could not find the answer.

Thank you.

The o2s are at .84 WOT, is that normal,




Here is a visual log & data

TechnoMotive Datalogger
(secs) (Hz), (RPM), (ms), Knock Sum, Oxy Feedback Trim (%), 02,TPS,Timing
753.68, 1158.84, 3812.50, 18.43, 0.00, 100.00, 0.84, 100.00, 18.00
753.99, 1461.15, 3968.75, 19.71, 0.00, 100.00, 0.84, 100.00, 18.00
754.30, 1480.04, 4125.00, 19.71, 0.00, 100.00, 0.82, 100.00, 18.00
754.62, 1530.42, 4281.25, 20.99, 0.00, 100.00, 0.82, 100.00, 18.00
754.95, 1606.00, 4406.25, 21.76, 0.00, 100.00, 0.84, 100.00, 17.00
755.28, 1606.00, 4562.50, 22.78, 0.00, 100.00, 0.82, 100.00, 18.00
755.62, 1606.00, 4718.75, 23.30, 0.00, 100.00, 0.82, 100.00, 19.00
755.96, 1606.00, 4937.50, 23.30, 0.00, 100.00, 0.82, 100.00, 19.00
756.29, 1606.00, 5031.25, 23.04, 0.00, 100.00, 0.29, 100.00, 21.00
756.62, 1606.00, 5187.50, 21.76, 1.00, 100.00, 0.82, 80.00, 21.00
756.96, 1606.00, 5250.00, 22.78, 0.00, 100.00, 0.84, 99.22, 21.00

 

[95blackGsTurbo]

You should be closer to .094V on your o2 sensor not .084V. Have you checked for boost leaks that might be causing fuel cut?

 

[5810]

Hi, I have no boost leaks, i pressure tested the system to 20 psi. new o2 sensor, my fuel trims are low 100,mid 100,high 82. i am running rich up top i guess. But does the log show fuel cut cause the ecu did not cut the injector signal or is it something else. All of this started with the 3" turbo back exhaust.

Thank you.