Loss of power/stall under light throttle.

[Sportsguy83]

Originally Posted by Model Citizen

passenger side
...

DAT blood doe.....

How hard was removing them? Did that fix it??

[Model Citizen]

Originally Posted by Sportsguy83

DAT blood doe.....

How hard was removing them? Did that fix it??

The cut was actually from skid plate.

I ****ed around an hour or two to get them without jacking. Was way easier and less painful just to toss it up in the air and undo a mount. Ape hands don't help.




Gotta pick up replacement plugs.

Oem is it at the moment right? Least far as general local availability?

[Sportsguy83]

Originally Posted by Model Citizen

Gotta pick up replacement plugs.

Oem is it at the moment right? Least far as general local availability?

As far as I know, yes....

[Model Citizen]

No luck after changing the plugs,

on the upside, they looked reasonably due for it anyway.

[steve99]

Originally Posted by Model Citizen

No luck after changing the plugs,

on the upside, they looked reasonably due for it anyway.

Mate I know sod all about turbo's or supercharged stuff but

You long term fuel trims at idle low RPM are about 12% in that first log.

and your AFR under light load just off idle and at idle are 11.2 seems very rich for 950rpm low load no boost.

something upsetting fueling ? air leak ,crook o2 sensor , leaking injector ?

can you log COMMANDED AFR ie what ecu is asking for as well as the measured AFR from 02 sensor ?

[Model Citizen]

Originally Posted by steve99

Mate I know sod all about turbo's or supercharged stuff but

You long term fuel trims at idle low RPM are about 12% in that first log.

and your AFR under light load just off idle and at idle are 11.2 seems very rich for 950rpm low load no boost.

something upsetting fueling ? air leak ,crook o2 sensor , leaking injector ?

can you log COMMANDED AFR ie what ecu is asking for as well as the measured AFR from 02 sensor ?

You have a very good point sir.

Put the sc kit map sensor back on, flashed delicious tune, connected plumbing.





As requested:

http://www.datazap.me/u/utekineir/ne...0&data=5-41-66

[steve99]

Originally Posted by Model Citizen

You have a very good point sir.

Put the sc kit map sensor back on, flashed delicious tune, connected plumbing.





As requested:

http://www.datazap.me/u/utekineir/ne...0&data=5-41-66

That new log look like what I would expect LTFT is low (zero) AFT 13 or 14 low rpm low load.

So thats with stock tune and stock MAF/MAP sensors. No injector changes ?

Might point to crook map/maf sensor (or their was leak in gasket at maf sensor.

[Model Citizen]

Originally Posted by steve99

That new log look like what I would expect LTFT is low (zero) AFT 13 or 14 low rpm low load.

So thats with stock tune and stock MAF/MAP sensors. No injector changes ?

Might point to crook map/maf sensor (or their was leak in gasket at maf sensor.

Right now i'm kinda starting to think fueling.

http://www.datazap.me/u/utekineir/more?log=0&data=5-12

http://www.datazap.me/u/utekineir/ne...og=0&data=5-12

http://www.datazap.me/u/utekineir/ne...og=0&data=5-12

take a look at the rail pressure on those logs.

[steve99]

Looked at some of my logs and the fuel pressure drops to 3 or 4 at low rpm. and goes to 13 to 19 higher rpm , that is only high ressure fuel pump the low pressure port fuel pressure is not monitored

your running rich so would assume that would be due over pressure, you would think low pressure would make it lean.

that tune you have has run ok previously ?? , its not a super safe rearly rich base tune just to get you to tuner ??

[Model Citizen]

Originally Posted by steve99

Looked at some of my logs and the fuel pressure drops to 3 or 4 at low rpm. and goes to 13 to 19 higher rpm , that is only high ressure fuel pump the low pressure port fuel pressure is not monitored

your running rich so would assume that would be due over pressure, you would think low pressure would make it lean.

that tune you have has run ok previously ?? , its not a super safe rearly rich base tune just to get you to tuner ??

The car has been running like a champ for months. It abruptly shit the bed mid drive the other day.

In the vein of running rich it looks to be consistently be -25 on the stft on a lot of my logs.

Spraying carb cleaner I was unable to find any sort of vacuum leak.

[steve99]

Originally Posted by Model Citizen

The car has been running like a champ for months. It abruptly shit the bed mid drive the other day.

In the vein of running rich it looks to be consistently be -25 on the stft on a lot of my logs.

Spraying carb cleaner I was unable to find any sort of vacuum leak.

looking like one of the sensors has gone, seems to be ok with stock map/maf sensors on stock tune but crook when you use the new sensors for SC tune, tune is unchanged so pointing to the sensors yu changed if i was a betting man

[Model Citizen]

Originally Posted by steve99

looking like one of the sensors has gone, seems to be ok with stock map/maf sensors on stock tune but crook when you use the new sensors for SC tune, tune is unchanged so pointing to the sensors yu changed if i was a betting man

I had a spare map sensor and its been swapped in (kw sent me 2 originally).

and had a local guy come by and let me use his maf a few days ago with no change.

[steve99]

Originally Posted by Model Citizen

I had a spare map sensor and its been swapped in (kw sent me 2 originally).

and had a local guy come by and let me use his maf a few days ago with no change.

ok that eliminates those.

im kind of out of ideas being on the other side of the world

all we know is its running rich suddenly on SC tune that worked previously. Stock tune no SC not rich. you have checked for leaks on input side of SC but what about on pressure side/ intercooler ect

time to send logs to your tuner

[Freeman]

Had a similar thing happen to a local guy. The way he explained it to me was that the computer that controls the injectors crapped out on him. $300 bucks to replace it.