My afr is crazy rich after the tune. I got tuned back when Mark came to FIS in Mckinney TX.

I just now got a wideband and after checking my afr I noticed I am running rich as hell. Under full throttle its 9.8-10.1 .

Thing is, I dont understand the utec fuel map. I just want to lean it out a bit.

I can switch to the stock turboxs map for tbe and my afr is 10.8-11 .

I contacted TT and they think my wideband is off. I plan on using one of my buddies just to check for sure.

Oh and when Im getting on it my load hardly ever gets to 100%. Why is that?

Thanks for any help.

--Josh

 

I never do afr tuning on the dyno unless it's a load-bearing dyno. If it's a dynojet it's gonna throw the airfuel off. The reason why you never hit 100% is because the utec probably has the 100% limit at a higher hz or you're just now flowing enough. I doubt your wideband is off. What kind is it?

 

It was on a mustang dyno. My wideband is a Innovate Lm-1.

I talked to Mark and he is emailing me a new map. He is a great guy and is going to retune for me.

Thanks TurboTrix!!

--Josh

 

I found the best tunes are the ones that are base tuned on a dyno, and then road tuned for each gear.. the Dyno is good for getting your timing dialed in, but you definitely need real world conditions to get your AFR's dialed in right, at least thats just been my experience.

 

I had the same issue with the TT tune and it was in McKinney as well. Under cruising conditions my afr was running 10.8 to 1. I could actually see my gas guage dropping. I had to pull over, to get gas as well, and retune the 0 through 30 percent columns to take a bunch of fuel back out. Under WOT I was running leaner than at partial throttle.

 

When cruising or just idleing my afr is 14.5 Is that about right?

--Josh

 

^ Yes to your last question.

 

Did any of you guys recieve a road tune after being put on the dyno?

Thanks,

Jermaine~

 

14.5 isn't that really lean?

 

Actually under idle the ecu will oscillate between 14.5 and 14.7 to ensure that the cat is working.

14.5 to 14.7 is normally where the car cruises as well this will help you get your gas mileage back and also allow you to have decent tip in acceleration.

Upon tip in your afr should gradually taper from 14.5 to your desired afr.

Thanks,

Jermaine

 

Are you sure your front O2 sensor is working? Cruising at 10.8 to 1 is nearly impossible if your car has the correct OLF transition point, and everything else is working normally.. unless you have a lead foot and are always at a throttle position over the transition point (assuming its at 25-35% which is normal depending on your tuner's preference) The only other reason for that is if the MAF reading and fueling are so way out of scale, that its trims can no longer adjust, in those cases the car drops to open loop anyway..

I had that happen on occasion if a sensor doesn't initialize correctly (usually the front o2 sensor) and it runs open loop, it tips in and bogs, and feels sluggish and runs rich..

 

What I have found was that if you set your tps at 25% you will always be in OLF. We typically use 32 to 35% depending on the customers driving style.

Thanks,

Jermaine~
www.turboxs.com

 

Yah, mine personally is at 35% (Which I'm fairly sure is default) and I generally hit 20% frequently, and 25% when passing at low load, so I can see that.

 

Hard to believe, but it was true. The 10.8 was seen at around 80 to 85 mph cruising home from Dallas. This would put the transition into OLF well over the transition point of 25 percent. The transition point was set at the lowest, 25 I think, and the injector scaling was 550/550. I turned the OLF up to 35 percent and just adjusted the fuel downlow for good measure.

The O2 sensor was mighty black after the ride home. It seems to be working fine, but I think that either the front O2 sensor or my tuner pro is off slightly at idle. I am going to run a few tests to confirm which one, as they read very consistent at partial to WOT loads.

 

Jermaine

I had a 15 minute road tune after the dyno tune. This is when the change to the OLF went from the factory setting to 25 %. Mark tuned out the stumble from CLF to OLF, but left me with a gas guzzling hog. All is well now, but at the time......