I just installed a AEM UEGO wide band and started logging, to my surprice I am seeing AFR of 12's at 6000 - 7000 rmps. At 4000- 6000 I am seeing 11.1 to 11.3, do I need to upgrade the fuel pump? The fuel maps are basically stock fuel map, timing map is stock. I will post log later as I am at work right now.
Mods are Cobb TBE, Perrin intake and filter and PPI LICP and running at 22psi, this is by looking at the boost gauge as I still don't have way of logging boost. I am not using a boost controller, this is using ecuflash.

Here is a log that I did today, this was in 4th gear.

 

Anyone had this problem? How do I know I need to upgrade fuel pump?

 

IDC% should determine if your FP is insufficient. Cant open your log

 

I was not logging IDC%, I will lower the boost to 20psi and log againg.
I do not know what is the problem with the file I tried uploading it againg but it does not want to open.

 

You have an evo8.

The fuel pump is the first thing you should have done on it hehe

 

I have similar problem, changed from Walbro to TRE fuel pump (both 255lph). I notice above 5000rpm, the AFR become leaner no matter how much fuel I dump in my afr map. Fuel press were dropping from 63psi to 55psi using defi (which is abnormal).

I switch back to Walbro (even it's noisy) and AFR is back to normal. I wonder why..

 

sub7 - what was your IDC above 5000? (with the TRE)

 

Above 5000rpm, max 82%. Here's the datalog if you interested.

Here's the short comparison from DLL.
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Is lean spool still enabled? It could just be the lean spool deactivating if the change is at 7000 and very sharp. Otherwise, it's likely that you need to upgrade the pump.

 

Leanspool is disabled. It's the same a/f map with 2 different fuel pumps hence 2 datalogs. Anyhow, I'll stick with the noisy pump (Walbro that is).

 

Sorry, I was referring to the original post ... unless your graphs are from the same car.

 

Yes lean spool is disabled. I did a log today but running 2 psi less, the AFR drop to 11.3. IDC was 78%, I will try to post the log latter, for some reason I post a zip file and then no one can see it even me.

 

If the IDC isn't 100 then the injectors arn't maxed out, so u can add more fuel in the map...

 

+1 iv seen my injectors hit 118% and i am upgrading but ur still way below where you could be. plenty of room for you to increase the fuel in your maps. richen that thing up

 

Thanks, I did add fuel and got my AFR to 11.1 by 6000rpm.