running lean mid range

[FC3Sleo]

just got a call from pip at wgt, my TII running lean at mid range and rich at top end, how can i sort it without going new ecu route?? can has no cat, no air pump, boost controller, and induction kit.

[antnicuk]

turn the boost down.....
it will be higher in the midrange as boost drops off at the higher end.   Could also try an adjustable Fuel Pressure Reg,  you could wind the pressure up a little then,  only problem is you might run rich at idle,  

What did pip suggest..  he is the person to ask..

[FC3Sleo]

he said will need a new ecu, or cheap option is to put on a safc.

[grinder]

is it bad to run rich at high revs ... mine does and did it from stock

[zevans]

is it bad to run rich at high revs ... mine does and did it from stock

It\'s safe, but affects mpg, covers everything in ****e, and means you\'re losing potential power... and also says to me your car has problems breathing somewhere along the line.

[grinder]

ooohhh interesting theory

at normal driving the AF gauge bounces around ( as its supposed to do ) - once i get to WOT it goes just into the rich side

i thought i was safe - and MPG - ha ha ha since when has that been a problem in a rx7 !! LOL

Stu