Afr

[ChIoVnIdCa]

I get 11.9 at idle.... 13.7 highest at wot and it gets richer in vtec. Never anything constant. Get it re-tuned?

[mozzandherb]

yes... that doesnt sound right

[preludeman92]

What are you basing this off of? I hope it's a wideband and not a light show gauge. You might try calibrating the wideband sensor.
Short of that, a retune is necessary. It shouldn't be richer at idle that WOT.

[ChIoVnIdCa]

What are you basing this off of? I hope it's a wideband and not a light show gauge. You might try calibrating the wideband sensor.
Short of that, a retune is necessary. It shouldn't be richer at idle that WOT.

wide band o2 ..... Like once a week I will get a o2 sensor cel when its real cold. And it will run at 17 a idle

[d112crzy]

wide band o2 ..... Like once a week I will get a o2 sensor cel when its real cold. And it will run at 17 a idle

that sounds like you have a faulty o2 heater circuit with your wb.

What ecu are you running? That's very rich. ~13.5 is where WOT should be the entire time, not just before vtec.

[ChIoVnIdCa]

that sounds like you have a faulty o2 heater circuit with your wb.

What ecu are you running? That's very rich. ~13.5 is where WOT should be the entire time, not just before vtec.

I have a oem nb o2 sensor that is directly interfaced with the ecu. The wb has its own bung and it goes directly to the gauge. I assume I do have a faulty heater circuit on my oem primary o2 sensor. I never get a cel for the heater circuit. Just the primary o2 sensor code. But it is only in the cold so it has to be the heater circuit. Would a bad o2 sensor heater circuit cause it to run rich even when its warm?

[d112crzy]

That depends on if you're running a stock ecu or not. Even a chipped ecu can cause it if the those sensors are not disabled.

[ChIoVnIdCa]

That depends on if you're running a stock ecu or not. Even a chipped ecu can cause it if the those sensors are not disabled.

Its a chipped ecu... So the o2 heater circuit may be disabled ? or throwing a code for the circuit is maybe disabled? Crome p06

[d112crzy]

You can disable the o2 sensor and the o2 heater in crome.

From what you're saying, I'm guessing they're not disabled.

When you say cold, do you mean cold as in weather or engine temp?

Could be that your o2 is bad and doesn't warm up fast enough so the ecu throws a code 1.

[ChIoVnIdCa]

You can disable the o2 sensor and the o2 heater in crome.

From what you're saying, I'm guessing they're not disabled.

When you say cold, do you mean cold as in weather or engine temp?

Could be that your o2 is bad and doesn't warm up fast enough so the ecu throws a code 1.

Cold weather and cold engine temp. If I leave it overnight when its real cold the first cold start will throw the code. When it throw a code I can turn the car off once the engine is warm and restart it and the code will go away. If I leave it only for a couple hours and start it with a cold engine it wont throw the code. When it will throw the code it is within 2 or 3 seconds of the car being started.

[d112crzy]

sounds like some sort of connection problem then.

or your o2 is going bad.

[mozzandherb]

What are the advantages and disadvantages of disabling the O2 sensor? Also if the sensor is disable is it still possible to throw a CEL that is related to the O2 sensor such as code 43?

[d112crzy]

When tuning, you disable the o2 sensor.

A lot of tuners choose to turn it back on because they don't tune partial throttle. I don't. I tune everything. I leave it off.

Advantage of turning it off? You don't have to worry about replacing an o2 or having any o2 related problems.

Disadvantage? if your tuner didn't tune it, then you'll be rich as hell.