Tuning HELP 2014 5.3 Installed headers without CATS

[miket37060]

Can someone tell me what is wrong with this tune and lead me in the right direction please.. TUNE AND LOG ATTATCHEDMike's 2014 Tahoe Headers Tune.hpt2014 tahoe log after headers.hpl

[YeeYee NNBS]

email me [email protected] get this shit ironed out with yeah partner

[rabbs88]

You might want to be more specific. What are your issues with the tune exactly? And please tell me you didn't email the spammer

[edcmat-l1]

Looks like a misfire on bank 2.

[Alvin]

Looks like a misfire on bank 2.

Respectfully.. it doesn't look like that to me.

[tana99ss]

So as im looking at the log i noticed the ltft in bank is either showing 0 or -.8 while bank 1 is jumping around. Not sure of a reason behind it but im going to guess something is either wrong with the o2 or its not connected/shorting out somewhere.

i do see it oscillating but its nothing compared to bank 1.

Make sure you are checking your codes, mysteriously they talk to us from time to time.

Trouble Codes:
P0157 - O2 Circuit Low Voltage (Bank 2, Sensor 2) (Permanent)
P0059 - HO2S Heater Resistance (Bank 2, Sensor 1) (Permanent)

[tana99ss]

also i understand you put "headers" on but a little bit more information about the setup would be helpful. Even a simple its all stock except "shorty/mid/longtube" headers, rear o2 are deleted etc etc.

good luck to you.

[edcmat-l1]

Respectfully.. it doesn't look like that to me.

Ok........

[Alvin]

Yes.. That does not look like a miss to me. That method only works at wide open or heavy load. His looks very clean at WOT.

In fact it likely has to do with a possible heater code. The FT on one bank is stuck/fixed. The other side is working. If one bank is hovering around stoich and the other is just a smidge rich like 14:1 it will look exactly like this.

[edcmat-l1]

Yes.. That does not look like a miss to me. That method only works at wide open or heavy load. His looks very clean at WOT.

In fact it likely has to do with a possible heater code. The FT on one bank is stuck/fixed. The other side is working. If one bank is hovering around stoich and the other is just a smidge rich like 14:1 it will look exactly like this.

I respectfully disagree.

Most secondary ignition misses will clean up at WOT. They typically are most noticeable at lower RPM higher loads.

Whenever I see a data log with 1 O2 nice and clean waveform and the other one like this, it's a miss. Can't think of a scenario where it isn't.

I think the fuel trim on that bank being stuck is a symptom of the miss. The sensor does not pass the computer's switching criteria.

Him posting "What's wrong with my tune" with no explanation further leads me to believe it's running like crap, I.E. has a miss.

I would bet if OP ever returns he'll say it runs like junk.