Tunning Question
11-15-2004, 09:06 AM
#3
you need to buy an apexi SAFC II. check their website for more info. there is nothing on the car that can adjust it but the consult 2 might able to make changes to the ecu that would affect a/f. but then you would have to know someone at a dealer.
11-15-2004, 09:23 AM
#4
It's chrome alright...
Join Date: Dec 2001
Posts: 4,009
11-15-2004, 09:24 AM
#5
if you get an adjustable fuel pressure regulator, you could run higher pressure and richer but teh computer will try to lean it out. my FPR was at to high a pressure and i started getting engine codes of "bank 1 rich mixture". at a certain point the ECU cant lean it out anymore, and you can run rich. i dont recomend this for daily driving because the MPG sucks. it does give your car a nice kick though
11-15-2004, 09:27 AM
#6
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Join Date: Dec 2001
Posts: 4,009
Originally Posted by I30swimmer
Is there any way to adjust how rich or lean you run the engine? Can i just adjust a screw somewhere, or do i acctually need to buy a computer that will do adjusting?
11-17-2004, 06:23 AM
#9
you have to replace the part that is not functioning correctly. some 350z guys ran lean with headers and full exhaust but from what i heard, even that was only slightly. if you are running lean the most likely your maf is bad or a bad primary (upstream) o2 sensor.
11-17-2004, 09:40 AM
#11
It's chrome alright...
Join Date: Dec 2001
Posts: 4,009
Originally Posted by I30swimmer
well when the car is running Lean... and has the check engine light on because of it.. how would i make it rich again?
How about taking it to a dealer and asking them to diagnose it and give an estimate on what to fix and how much, then deciding if it's worth getting done. If you somehow figure out a way to richen it up, you're only hiding the problem, not fixing it.
11-17-2004, 01:17 PM
#13
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Join Date: May 2002
Location: Atlanta
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DTC No. P0171 0171 (Bank 1); P0174 0174 (Bank 2)
Trouble diagnosis name: Fuel injection system too lean
DTC Detecting Condition: Fuel injection system does not operate Properly, the amount of mixture ratio compensation is too large.(The mixture ratio is too lean.)
Possible Cause:
Intake air leaks
Heated oxygen sensor 1
Injectors
Exhaust gas leaks
Incorrect fuel pressure
Lack of fuel
Mass air flow sensor
Incorrect PCV hose connection
Trouble diagnosis name: Fuel injection system too lean
DTC Detecting Condition: Fuel injection system does not operate Properly, the amount of mixture ratio compensation is too large.(The mixture ratio is too lean.)
Possible Cause:
Intake air leaks
Heated oxygen sensor 1
Injectors
Exhaust gas leaks
Incorrect fuel pressure
Lack of fuel
Mass air flow sensor
Incorrect PCV hose connection
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