Multiple logs, odd fuel trims

[fst_4g63]

Well here are my logs and situation, The vehicle 92 tsi awd problems are as follows.

Fuel trims with no movement

My o2 is cycling but to no effect, And I also have the proper temperature readings. I am confused to the point of wanting to sell the car, I turn up the boost car acts bogged then takes off. All help will be appreciated and explored fully thank you.

 

[dsm-onster]

Your front o2 is dead. It's not cycling at all and reading low.

****EDIT: Oh I see you have the front and rear o2 mislabled. . .

 

[fst_4g63]

Yeah thats mmcd for yah it labels backwards for no good reason.

 

[dsm-onster]

Are the plugs black after a pull? When it stumbles, is there smoke? What color is it?

 

[fst_4g63]

Car does not blow any smoke at all, Currently blowing thru full stock exhaust with 2.5inch dp. The exhaust cut-out motor broke again. I will pull them right now and have a fully positive update I will be right back momentarily.

Well I pulled the all 4 and they are pail white, the armature is actually turning white.

 

[steve]

Look at your actual longs in MMCd and tell use what the coolant temp, intake air temp, and barometric pressure are. The idle log looks questionable, the TPS voltage looks a little low, and the ISC steps higher then it should be.

 

[fst_4g63]

The coolant temps are around 199-209, the airtemps move between 92 and 103, and the bp. is 13.9-14.1 but never moving from there. Like I said thanks again And I will respond immediatley.

 

[dsm-onster]

For the logger I use outside of link (scanmaster), it should read 100 for sealevel and a percentage lower for however high you are. Saint Louis should not read so low barometrically if that number corresponds to my logger.

This would explain the very lean condition your plugs are showing you. And, would explain the stumble early in the fuel curve.

 

[steve]

MMCd reports the pressure in psi. That's not that far off what I read depending on the weather.

 

[dsm-onster]

AH! I see. . . Makes sense now. . . So there still seams to be no reason in the logs for his lean condition as reported by the plug color

 

[steve]

People continue to think this means it's lean when what may be going on is two things. First is that the car operates in closed loop much of the time and it's going to run about 14.7:1 and second the stock plugs seem to be run at the high end of their heat range which burns off most of the deposits.

6's in my car have been matte white when I pull them normally for almost it's entire life.

Unless you shutdown at the end of a pull and remove the plugs it's hard to get an accurate read by color.

 

[fst_4g63]

Wondering myself if the massive amount of timing is what is causing the plugs to look the way they do. Which in that case wouldnt I just tell the thing dump fuel and crank the boost (thats a joke) let me know what kind of other things i need to look into.

 

[fst_4g63]

Well so I changed out the chips back to a stocker. The timing has gone insane at idle without a load, at 750rpm's 6-10 degrees but at 1500rpm's about 35-40. The fuel trims have flipped to the opposite end, while trying to tune now the low end is around 104 pretty solidly. You can actually here the car popping through the stock exhaust, I am thinking about just sucking it up and getting link.

thanks Darren