LS1 Maf the new ACDELCO 213-4657

[bora]

hi there

i have done some mod on my car.Camaro Z28 2000 A4

BBK Longtube Headers ,Ypipe and Borla Catback Exhaust
K&N Cold Air Intake
car runs rich more than i expected
we reconised maf defected and we changed it with the new one but new one got new design(AC Delco 213-4657).it seems we need to calibrate it to work fine for the car.
Do i need a tune with those mods
Car runs realy crap right now Fuel eco is terrible.
Btw Spark plugs changed
o2 Sensors changed too(4 of them) downstream o2's going to get tuned out soon.

Waiting for your adviceses and help.

[jimmyblue]

The car parts web sites seem to say this is a direct replacement
and you'd assume that means calibration too.

Not a fan of K&N or any other greaseball air filter, prone to
cause MAF drift over time. Running poorly might have to do
with the long tubes, be sure you are not seeing closed
loop false trimming (which commonly makes for poor idle
and poor economy). Might try forcing open loop for tuning
generally, and then see what closed loop does for / to you.

[bora]

i heard the bad thing about the k&n air filter i am thinking to go back to stock.Btw thanks for your reply.
i hope my tuner can fix the problem.

Regards