Ok heres the situation.. When i first WOT my car the AEM WB will read low to mid 12s A/F.. well as i continue to the next gears 3-4th the A/Fs drop to mid 11s to low 11s by 4th gear.. But i have to go through the gears for it to drop... Seems the more I ream on the car back to back the more the A/F will read in the low 11s. But if i drive down the road and then go to retest it goes lean for a gear or 2 again. My high and low octane maps are VERY close so i cant see it jumping between the 2, and my car isnt getting any knock count.. and the AEM WB is new 2 days old.. SO im lost. Is there an adjustment on ECU FLASH that would cause this? Its very odd and i have never ran into this problem before with anyother car. Hopefully mellon or one of the tuners that are very familiar with the software can help me out here I hope.

 

Well I just drove it again to try and figure it out... and i cant lol. But whats wierd is if i shift the car hard into the next gear it will go to mid 11s A/F and stay right around that through the gears as long as i shift it fast... if i shift it slowly letting it drop boost it will stay low 12s A/F.... This is very odd. Anyone???

 

Lets play a game. You do a log of you running through gears. And also a simple 3rd gear log(2500rpm-7000rpm) When you're ready we'll start the game

Let me ask you. Is your car tuned? Are you tuning yourself?

Your car is hitting different load cells ...lets see those logs and your map

thanx bye

 

Do you have lean spool enabled or disabled?

I believe lean spool will cause each gear to be richer than the previous gear.....which seems to me is what your describing?

 

This is unavoidable with factory ECU which is factory setup for X-tau differences at stock HP. As car get's faster, the AFR differences get worst, 1st being the leanest and richer on up the gears

 

but he says it only goes rich when he hammers it. I witnessed something similar when logging 1/4 runs. In a standard 4th gear pull, my AFRs were around 11.4:1, but in the 1/4 (hammering through the gears), they were about .4 or so richer in 4th.

I was able to tune it out after disabling lean spool and many drag vs hwy logs. The issue might lie in the new Load values that JB discovered that are corrected for air temp and baro.

 

Lower gears will always be leaner then higher gears. Only worry about what the AFR is in 3rd gear.

 

I dont think i explained it correctly so i appologize for that, as you all have it wrong... No matter what gear im in if i roll into the throttle it will run lean for the 1st gear i roll into "no matter what gear it is"... And if i shift all slow and easy itll stay lean... Now heres the wierd thing. IF i hammer the crap out of the next gear AKA speed shift it, the car will go to mid 11s and stay there. I have Mellon on the case and have already sent him some logs. That guy is on top of his customer service like no other, took the time to talk to me on the ohone a couple times yesturday ect. Props to Mellon Tuning!!. The car was tuned at AMS when the previous ownder had it but i have spent 2 weeks trying to get ahold of chris the guy that tuned it to get NO response whatsoever... Guy must be so busy its rediculous, but i cant be waiting around on somone that wont respond or my messages ect. I have tuned MANY cars with AEM, autronic ect.. Have a Turbo GSXR 1000 i tune myself, a fully built Talon AWD with a 61 ect blah blah.. Im no newbie to tuning but i AM a newbie to this ECU Flash software.. I mean theres no instructions or anything on it. Its just like heres a program figure it out lol. And i cant figure out why my car would be doin this odd A/F deal. So im lost as i dont know 1 thing about this ECU Flash. I have tried to richen it up and yes it gets richer but when i hammer the next gear it goes to low 10s and looses all kinds of power if i try to get it in the 11s when i first hit it... So i dunno what is goin on. I know its 100% normal for these cars to go richer the higher gear u go. But it isnt normal for it to be doin what its doin. Any help or information would be appreciated.

 

post your map. Or let Mellon guys handle it

 

Have you played with the Accel Enrichment map at all?

 

I am curious to find what the accel enrichment does for I still don't know.

 

Log it and see what it does.

 

I understand now. There is aways people that dont understand that lower gears are leaner.

As for your problem, I would look into what razorlab suggested.

 

The only thing I have touched on it is the fuel map from 3000RPM at 200 load till 260 and 7500rpm where it maxes out out. And I ended up just putting it back to where AMS had it set. Im sure mellon can get me straight. I was just looking for any help I could get to understand why this problem would happen.

 

Chris is in Hawaii. Poor guy!