Running probs - error message

[kevo66]

"Catalytic convertor not running at optimum efficeincy (bank 1)"

Now before you say "well duurrrr, it has no cat" I know that!!

Should you get that msg when you de-cat? What does "bank 1! signify??

 

[ben_p]

Get out of the car, walk away (run even)

Its about to expode!

 

[Panda]

i maybe wrong but aint bank 1 one of the oxy sensors(before cat iirc on the 182)

 

[kevo66]

Get out of the car, walk away (run even)

Its about to expode!

Thanks for a helpful responce Ben, I thought with your experience (from reading your many threads) you would have a more constructive answer.

Panda, thanks for that mate I will look into that.

 

[ben_p]

Thanks for a helpful responce Ben, I thought with your experience (from reading your many threads) you would have a more constructive answer.

Panda, thanks for that mate I will look into that.

Oh chill out! Where did you get that code from? Rs tuner, obdi?

 

[kevo66]

Oh chill out! Where did you get that code from? Rs tuner, obdi?

LOL you know how it is when your car isnt running right!! I want it sorted!!!

It was from some fancy fault code reader that our work fleet rpair company use!

 

[Panda]

is the car runnin ok ?

cud prob be just cus of ya decat

 

[kevo66]

is the car runnin ok ?

cud prob be just cus of ya decat

No mate, it was lean as fook so took to RST who richened it out (was 16BHP down)

But now the characteristics I was getting when it was too lean are back, which are slight delay at 5500rpm and general s**t running!!

Also when really pressing on, on a good run it seems to loose power but at the same time the exhaust note goes really quiet so f**k knows what thats about!!

 

[Panda]

Also when really pressing on, on a good run it seems to loose power but at the same time the exhaust note goes really quiet so f**k knows what thats about!!

That sound sim to when my oxy sensor(after cat 1) went on me 182, im guessin uve not got that oxy sensor no-more now u got a decat & if u have wont it be readin up as too much sh*t goin into atmosphere so wud run lean to compensate ?

 

[Panda]

Just as a test i would put the cat back on just to see if theres any improvement.


Im sure sum1 with more know will come along soon.

 

[kevo66]

HMM!!!!! I think cat back in TBH!!!

 

[kevo66]

anyone else?

 

[theduck]

What sensors have you got in place on exhaust? It sounds to me as though 1 or more of the lambda sensors is f**ked. The one pre cat I believe is used to check that the car is running right, so if thats knackered and saying there is too much fuel all the time, the car will keep leaning itself out.

also if post cat is plugged in then it will be reading as though the cat isnt working. Try pluging the hole and tying the sensor up under the car so its reading fresh air.

 

[Panda]

also if post cat is plugged in then it will be reading as though the cat isnt working. Try pluging the hole and tying the sensor up under the car so its reading fresh air.

Just out of interest in theory by doin that wudnt that make the car run rich ?

 

[kevo66]

The sensor that came from the cat has been screwed back in as the decat had a hole for it????

 

[theduck]

Just out of interest in theory by doin that wudnt that make the car run rich ?

no as the post cat sensor is simply for measuring emissions, not for fueling, only the precat sensor is for fueling - this is presuming its the same as my mk2ph1 non sport.

The sensor that came from the cat has been screwed back in as the decat had a hole for it????

Plug the whole,pretty sure an opld spark plug will fit, then put something over the sensor to protect it and tie it up under the car and try that.

 

[Homer-Simpson]

The sensor that came from the cat has been screwed back in as the decat had a hole for it????

I thought you are meant to blank that hole? Then wrap up the sensor and cable tie it somewhere safe (still connected)? The readings it is expecting will be for when a CAT was there, if you haven't got one the readings will be way out and will be causing the error. Well that is how I see it (I am no expert)

 

[ben_p]

I thought you are meant to blank that hole? Then wrap up the sensor and cable tie it somewhere safe (still connected)? The readings it is expecting will be for when a CAT was there, if you haven't got one the readings will be way out and will be causing the error. Well that is how I see it (I am no expert)

As above (I did this on my 172 anyway)

 

[trile]

I thought you are meant to blank that hole? Then wrap up the sensor and cable tie it somewhere safe (still connected)? The readings it is expecting will be for when a CAT was there, if you haven't got one the readings will be way out and will be causing the error. Well that is how I see it (I am no expert)

why would u have to blank it when all decat pipes (yozza/milltek/ktr) come with holes for the sensors ?

 

[Neal 182]

Try putting the cat back on could be down to the ecu trying to get your car to run at a lower Co2 than the 6% it most likely running at now

 

[Homer-Simpson]

why would u have to blank it when all decat pipes (yozza/milltek/ktr) come with holes for the sensors ?

Because a catalytic converter reduces the toxicity of emissions, the first O2 sensor before the cat gets a reading, the gas then goes through the catalytic converter. A second oxygen sensor is fitted after the catalytic converter to monitor the O2 levels. The on-board computer makes comparisons between the readings of the two sensors. If the reading is the same then it knows something isn't right. The second sensor should have a different reading.

If you speak to Yozza (and probably everyone else) they will normally blank the hole and make the 2nd sensor secure or remove it completely (like they did with mine). I am sure GDI/Yozza/KTR/Icarus/Fred/another tuner will be in here with the correct reason if this is wrong though

 

[kevo66]

Hmm ok Ill try blanking that then!! Two questions though!!!

1) why do decat pipes have the hole in the 1st place for the sensor if you are meant to blank it??

2) What should I blank it with??

 

[theduck]

Hmm ok Ill try blanking that then!! Two questions though!!!

1) why do decat pipes have the hole in the 1st place for the sensor if you are meant to blank it??
f**k knows

2) What should I blank it with?
Spark plug fits iirc

 

[Seedy172]

Random alternative option, what about the Injectors?! Or am I well out there?

 

[theduck]

Injectors wouldnt give that fault

 

[kevo66]

Off hunting for sprak plugs then lol!!

 

[mbarnes]

Homer, so are you saying if the second one detects fresh air it thinks things are ok, and if it detects dirty air (ie the exhaust air) it throws an error?

i think i get you. sounds a bit backwards that having the sensor "hanging free" will cause less of a problem, but i think i get it

 

[kevo66]

Just googled, people reckon that its the 1st one that alters the AFR. The 2nd just tells the ECU if the cat is fucked or not???

 

[TooneySonic]

new 1st lambda + put the cat back on IMO

ps on a side not kev when is that RR day @rstuning? want to have a new catg back on for then

 

[Fred@BTM]

you got that weird flat spot with the decat kev?

 

[TooneySonic]

i have slight flaspot @3.5k with decat, taken mine off now

 

[Mark One]

Just a thought....

did some research into this recently and I think i remember reading somewhere that some ECUs are able to r****d ignition to generate hotter EGTs and heat the cat up if it reads that emissions are too dirty.
Meaning if you leave your 2nd lambda in (with decat) the ECU would r****d ignition to try and heat a cat that isnt there.

Is this true?

 

[kevo66]

new 1st lambda + put the cat back on IMO

ps on a side not kev when is that RR day @rstuning? want to have a new catg back on for then

2nd May matey!!

you got that weird flat spot with the decat kev?

No mate, still got it

Just a thought....

did some research into this recently and I think i remember reading somewhere that some ECUs are able to r****d ignition to generate hotter EGTs and heat the cat up if it reads that emissions are too dirty.
Meaning if you leave your 2nd lambda in (with decat) the ECU would r****d ignition to try and heat a cat that isnt there.

Is this true?

Hmm, I wouldnt have a clue mate, I do remember the ignition timing being off though!!! :boring:

 

[theduck]

Just googled, people reckon that its the 1st one that alters the AFR. The 2nd just tells the ECU if the cat is f**ked or not???

This is what I said mate!!!

I think you potentially have a f**ked precat which is causing fueling issues and having the post cat one plugged in is causing the error meesage.

EDIT: or if what MarkOne says is right then its all down the post cat one being plugged in, so try removing that first.

 

[kevo66]

This is what I said mate!!!

I think you potentially have a f**ked precat which is causing fueling issues and having the post cat one plugged in is causing the error meesage.

EDIT: or if what MarkOne says is right then its all down the post cat one being plugged in, so try removing that first.

Aye, will do!!! Post cat being taken out today!

 

[theduck]

Good good. Let me know how you get on!

 

[TooneySonic]

any luck sweetie?

 

[kevo66]

any luck sweetie?

Aye :dapprove:

Lambda out, hole plugged!...........


Engine mgmt light on along with the "check emissions" msg and spanner

 

[Homer-Simpson]

Aye :dapprove:

Lambda out, hole plugged!...........


Engine mgmt light on along with the "check emissions" msg and spanner

Will that error go away on its own though or does it need to be reset?

 

[kevo66]

Will that error go away on its own though or does it need to be reset?

Wasnt on at 1st mate!!

TBH Im not bothered about the msg or spanner.

Its the managment light that concerns me!!