I just installed an hta 73 green and finally ready to start tuning. When I did the first pull since the turbo install and 1120 fic injectors I did a pull in 3rd gear to 6500 rpms and afterward checked the log and my afrs are right about 13 wot the whole time in boost.. pretty scary but there was absolutely no knock at all. Any ideas what could cause my aem wideband to read so rich at wot? I'm thinking maybe to o2 wideband sensor could be inaccurate or maybe the wabro 255 fuel pump is bad.. Maybe even and exhaust leak before the wideband o2 sensor? AFR's were always right where they should be before I installed the new turbo and injectors as far as I can remember.. on 93 octane btw. Any ideas would be great, thanks.

 

You went WOT without changing the tune after you switched from stock turbo to a HTA73 green?

 

no, my tuner sent me and updated tune and my afr's were supposed to be more on the rich side like in the 10s for the first wot pull but according the the afr gauge it was around the 13s

 

Had a similar issue my sensor was bad. After I replaced it the Afr's were inline with what I'd expect. To be certain perhaps find a shop that will let you do a couple pulls on their dyno and monitor the afr with an external wideband hooked up to the tail pipe.

 

I just tried the putting the o2 sensor into a rag covered in gasoline and it went from full lean to full rich and stayed there so now I'm thinking maybe its the fuel pump?

 

Yeah. Now is a good time to know the fuel pressure and see if it keeps up with the Boost.

 

so I replaced the walbro 255 fuel pump last night and afrs are still in the low 13's at wot. Zero knock btw. I'll be taking a closer look to see if I can find some kind of exhaust leak before the wideband o2 sensor.

 

Richen the fuel map by 2 points or reduce the injector size scaling.

The fact that you changed injectors makes it possible that its a tuning issue. Even though they are bigger injectors, if the scaling is off it can cause the issue.

 

My car is now going more rich around 11 afr after around 5k rpms but my afrs are still lean during spool up. Do you guys think I have a fuel problem still causing it to be lean in spool up? I did install new injectors when I installed the turbo. Here is a log.

 

How are your fuel trims? As the post above mentioned it could very well be an injector latency issue. Do you have lean spool turned on? Looks like you have plenty of fuel at WOT just checked the log.

 

Lean spool is set to start at 1500rpm and stop at 1500rpm. Here is another log that I just did yesterday. Didn't have this problem until installing the new fp green and fic 1120cc injectors. Heres a log that I just did. My tuner cant figure out why it wont let him make the car go richer in spool up and ideas would be great.

 

I know there is a setting in tephramod where you can set when the car goes into open loop based on throttle position. Do you know where the tuner has it set?

 

Here is a picture of the open loop throttle high load settings