Lund Flex Fuel AFR

[venumous]

Guys what are you seeing for AFR on the Lund FF tune while running 93? I've driven about 10 miles and I'm seeing 10.8 at idle and around 9.2 WOT.

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[Terminator2]

Guys what are you seeing for AFR on the Lund FF tune while running 93? I've driven about 10 miles and I'm seeing 10.8 at idle and around 9.2 WOT.

Should be 14.7 on 100% gasoline and 14.3 on most pump 93 which is around 6-7% actual ethanol. At wide open should be around 12.2-12.6 at wide open on 0% ethanol and around 11.8-12.4 on regular pump 93.

 

[venumous]

Idk how long it takes to adjust but being that it's super rich I'm not sure How much sense it makes to just keep driving it without contacting Lund.

 

[jgedde]

Guys what are you seeing for AFR on the Lund FF tune while running 93? I've driven about 10 miles and I'm seeing 10.8 at idle and around 9.2 WOT.

That's about what I'm seeing with my Lund FF Tune... I see 10.2 at idle, in the 9's at WOT

The numbers sound right... http://ethanolpro.tripod.com/id213.html

John

 

[Terminator2]

Idk how long it takes to adjust but being that it's super rich I'm not sure How much sense it makes to just keep driving it without contacting Lund.

Yeah that's close to what I would expect on E-85 or close to it like E-72. How much 93 is in the tank and were you running E-85 before this?

 

[venumous]

Never had any E85 in it. Just loaded the tune for the first time after installing the intake last night. It has Sunoco 93 in it.

 

[Terminator2]

That's about what I'm seeing with my Lund FF Tune... I see 10.2 at idle, in the 9's at WOT

The numbers sound right... http://ethanolpro.tripod.com/id213.html

John

Not if regular 93 his numbers don't sound right. His fuel should be 10% max ethanol so max stoich around 14.1 and 11.7 at wide open at the richest normally.

 

[v8440]

I'm having the same problem, only much worse. It's not a Lund tune, but I loaded a flex tune in my gt, with nothing but 93 in the tank. The dash is reporting mid 6's for afr, and it set two codes, a P2196 and P2198. I only drove it a couple of miles, and the previous non-flex tune is getting loaded before it gets driven again.

 

[venumous]

I wonder if Lund starts at E85 numbers for the tune and works toward 93 being that your fueling would be dangerous if you started on E85 and had 93 parameters loaded and went WOT.

 

[Lonmon]

Wow. Somethings either wrong with the tune or your a/f sensors. I would switch back to a regular 93 tune and see if it goes back to normal. You should not see that rich of an a/f on 93 for sure. If it goes back to normal then the sensors are probably ok and it must be a tune issue. I'm not sure if an intake leak can skew your a/f that far. I would still check everything.

 

[venumous]

Car was spot on before the manifold install with the Bama tune and it can't be tuned back due to the manifold. A leak would create a lean condition, shouldn't create a rich one. It has to be the tune.

 

[Lonmon]

Yeah, it would create a lean condition. I guess I was hung up on thinking of something that may fool the fuel detection. I know it uses the a/f sensors but I'm not sure how or if it works with other systems to determine what fuel is in the tank.

 

[venumous]

Wonder if @dereck@lethal or [MENTION=10926]beefcake[/MENTION] could chime in.

 

[v8440]

Mine is completely fixed by switching back to a 93 tune.

 

[Kahboom]

Did you data log your tune yet, and send it in to be revised? Also what size injectors are you using with the new manifold?

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