The reason i ask is because my car is suddenly running leaner and leaner after having nearly a perfect tune a few months ago. My fuel map is reaching 99's under boost and still not making enough fuel! Yes, the air got cooler but not that much cooler!

My best idea to why this is happening is because of rich spots on my map, which is causing my "long term" fuel trims in the ECU to slowly drop. With a snap on scanner i found that my long term trims are -36, and short term varies +/-5 at idle (of course after adjusting the map +20 duty cycles due to it being 16 afr's at idle...)

Does anyone else know what their long term trims are? Im running 550cc injectors, Dezod S1 kit. Should I reset the ECU and try tuning again?

 

we shud just f the aem fic and get standalone lol

 

-36 is a HUGE trim. You should be closer to like -7 or less. I have a local fella that has our kit that is gonna stop by today or tomorrow and I will check his e-mangle with fuel trims and report back.

 

^ What is your injector pulse set at ? it should be around 486ms I had problems with that map you had started with because of the injector pulse being set to high. You should be adding around around 25% fuel up top at 8psi.

 

emanage FTL

 

We don't have the emange we have the aem fic

 

sounds like something has changed, possibly a leak somewhere?

 

F/ic is correct... Pulse is around 486,s

adding 99% fuel @ 8spi!! how can i relearn fuel trims... can i just pull massive fule @ idle and let it re learn?

 

Daaamn, you're almost at the max LTFT (I believe it's +/-50).

Are you sure your MAF and 02 maps are correct?

 

02 maps look just like Base maps from dezod, MAF is just about there too...

Paul, do you have any updated "Base maps" or any other maps for similar cars I can work off of?

 

I remember someone had a problem like this, don't remember who...but it turned out that their MAF map was wrong...

 

What MAF Map are you using? Mine is based off the *C* map... which was made for 650cc and im running 550.. i bumped up the MAF map accordingly though..

 

I'm still not boosted, so I'm not using any MAF map yet lol.

 

lol anyone else have a MAF/02 map thats working 100% on AEM F/IC?

 

i don't even use the maf map. i have it set in percentage at 0% and just set the maf clamp at 5.05. I have had 0 problems running it this way. it seems like i have more control over the tune by not using the maf map

 

I worked from the maf map on aems site and set the o2 values based on MAP Load which is working pretty good for me. I can email what I have over to you to try if you want.

 

i have about 10 maps from various tuners / setups... they all look about the same, not sure what to do

Today i tried running differnt maps, alllll of them run lean.

seems like no matter what i do the car wants to idle @ 16AFR... unless i change my 02 map to 2.8 for idle

do 02 sensors go bad from not having cats?

 

How much fuel are you pulling at idle ?

 

at idle fuel trims ~ -10, still idles at 15ish afr

 

Hmmm. Maybe trying clamping the MAF a tad sooner, but this will overall lean out your tune. BE CAREFUL doing so! You may want to work more on your O2 skewing map as that can also alter trims drastically as well.