General Lean at WOT

[beniger]

I looked at other thread similar, but not the same. I just recently reset the timing on the car to stock and lowered the idle to 750. Any who i started logging at about the same time and keep getting phantom knock just driving thats not my problem. my problem is when i drive i have normal afr according to both the logger and my wideband but, when i begin to boost or go wot my afr's go to 16-17. I installed my evo 8 fuel pump to see if that would help and it didn't change anything. I'm going to change the fuel filter here soon not sure what it could be. Need to resolve this to add my holset and safc and make real power.

 

[jeffo]

It sounds to me like your FPR isn't raising the fuel pressure 1:1 with boost. Have you made sure its getting a good boost reference? Have you tried bypassing the FPR solenoid?

 

[beniger]

I haven't, i plan to check my fuel system this weekend; on my logger my IDC also are low that is why i suspect the fuel filter because the injectors aren't being over ran but maybe i'll check the FPR