I am having an issue with my AFR's at idle. I am adjusting the basemap injector duty numbers to try and lower them to lean out the afr's but no matter how low I set them, my AFR's will not go above 12.2

Would fouled plugs cause an overly rich air fuel ratio? One of my turbos is toast and is causing a significant amount of oil to accumulate in my intercooler piping and throttle body, I also swapped out the old plugs that were wet with oil

 

First you must answer some questions as you have not given us enough info about your setup!
(1) Are you running an air pump?
(2) Is the O2 FB switch turned off or on?
(3) Where is your O2 sensor located for AFR testing?
(4) Are you running any CATS?
(5) What primary injectors are you running and waht is their setup?

 

1.) Air pump has been removed
2.) 02 FB Swith is Off
3.) The Wideband sensor is located at the tail end of the down pipe just before it meets up with the midpipe.
4.) No CATS
5.) 550 primary 850 secondary

I can post the .dat file of my current configuration if you want to look at it.

Thanks

 

Yes, load the map as what you posted is fine.

 

I attached two maps -

workinprogress is the map currently on the car

The second file, done, is the tune that John did for me at Protech Performance in Austin. If you could adjust that map for me so it will work in the higher altitude I would be more than happy to pay you for your time.

The altitude really changes everything on the car, vacuum is completely off, afr's are unstable. That and I think my turbos are going out the window.

 

I can not see anything that is preventing you from leaning out the idle on your newer map. Unless your idle fuel pressure is way too high, or your O2 sensor is bad.

But I see something else. You took a map that is too timing retarded for your mods and mad it even more timing retarded. Unless you have gigantic ports and running high boost, all on stock in jectors. Boost response and power must really suck!

 

The timing was retarded dramatically so I could do some pulls in the higher altitude without risk of detonation. Once I had some base data I would progressively add timing to it. I really have no idea why in the hell the AFR's will not go above 12.2 --- when I start the car cold it will idle at about 13.5 - 14 for the afr's. After the car warms up it will not go above 12.2

My guess is that it is probably related to the extreme internal oil leak that I have ( I believe a bad turbo seal ) which is fouling the plugs. Since my turbos are kaputz, I cant log any real viable data for people to look at so I guess I will have to wait until I go single =D

 

I was thinking about one other thing... what is my battery voltage supposed to read once the car is warmed up?

When I start my car cold it will read 14.2 volts, once it is warm and everything is pretty heat soaked the commander will read 13.3 - 13.8 volts. ( I am aware if the voltage reads below 13.5 that technically the car should be running off the battery - I likely have a bad ground somewhere)

I have my theories about why the voltage drops but staying on point; if the voltage drops below what is "normal", could this have any influence on my AFR's?

 

If anything you will run leaner with less voltage to the fuel pump.
Might be a stab in the dark but what kind of vacuum are you pulling at idle? The more vac you have the lower the effective fuel pressure thus you will run leaner.

 

My vacuum sucks right now in comparison to what it was at sea level. In Texas the car was pulling 18 - 19 inches of vacuum. Here at 4500 feet, the vacuum is at 12-14, I didnt have gobs and gobs of oil running through my intercooler piping in Texas either =\

The altitude is really tripping me out though and I am still trying to better understand it. I am in a lower pressure zone due to the altitude, which in turn reduces the total PPM of oxygen which in turn should make the car run richer but... on the flip side, since the car runs off a MAP sensor and not a MAF you must also adjust for the difference in pressure change.

When I was driving up here, I was constantly making logs of data as I drove and by the time I had made it here, the car was boosting an entire cell to the right on FC Edit. Not a polynomial but an entire 5 cells right, so the timing was way off (35!!!) so I didnt dare boost the car until I had time to make adjustments.

 

A normal battery reads a little over 12 VDC. Anything over this will charge it!
Thus your hot 13.3 will charge. The alternator is made to put out a higher voltage
when cold and less when hot as it reflects the charge characteristics needed to charge the battery.

 

Cool, thanks for the clarification cew

 

My car wouldn't idle leaner then 12 either. It's because the pfc will only reduce fuel to a certain level. You would think with stock injectors in the primaries this wouldn't be an issue. For whatever reason it was for me. if you use negative lag it will allow you to lean out your idle just be sure you add fuel to the rest of the map to make up for this.

 

So retard the timing?

 

Your timing needs advanced, Not retarded. Your lag settings for the injectors could need a negative lag setting in order to reduce the fuel enough at idle. I had this problem with stock primaries also.

 

Interesting... my car is torn apart right now so I wont be able to verify this until I have it all back together in a few months.

Thanks for the input