Hi I have a s8 fd its runs lean coming onto boost ( up to 16.0:1 ). I have upgrading to fuel pump with new filter, upgraded fuel pump and wiring to delete factory wiring problems, Checked map sensor signal and tps signals to ecu thay are all within specs ( car is standard by the why ). Any input would be greatly appreciated

 

What haltech ECU mate. post the map.

 

This Rx7 still runs the standard ECU

 

then you should post in the general 3rd gen section, this forum is for cars with standalone ECU's.

for the why, i would check for boost leaks, like a ripped coupler.

 

I will try and post it in there today, I have check over for boost leaks, but I have no injector pulse coming from the ecu to trigger the secondary injectors, I have swapped over to ecu to a known working unit. Thats why I was looking at map and tps siganls to the ecu