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Old 02-25-2014, 07:08 PM   #1
jhise
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possible tune or injectors

hi. i have a 02 zx5. so far i have put on 4 into 1 long tube headers 2 1/2 exhaust no cat. now i just put on svt mass air flow housing and air box. when i installed it i unplugged the battery and drove 50 miles for it to relearn. i am worried about having a lean fuel condition. so what should i do. tune, injectors, or not worry about it. if injectors how many pound injectors should i run. i am a complete newbie on this site so i am sorry if i am in the wrong area.


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Old 02-25-2014, 07:12 PM   #2
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Put the stock MAF back on the car.
With the SVT one you will be lean, dangerously so.
If you want to use the SVT MAF, you first need a tune for it matched to your injectors.

If you'd happen to swap the MAF and injectors for SVT ones, the issue would not be as bad. Though a tune is still needed.
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Old 02-25-2014, 08:22 PM   #3
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ok so it looks like i need bigger injectors. i think my stock ones are 19lbs. i don't have access to the svt injectors. i guess i will need what like 24lbs injectors. not sure.
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Old 02-25-2014, 11:46 PM   #4
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Why do you think you need larger injectors?
From what I'm seeing, stock are just fine. You don't need larger until you get into the 140-150whp range. Which you're no where near.
And larger ones won't give you any more power, nor will a larger MAFS.
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Old 02-26-2014, 03:46 PM   #5
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i am not up on fuel injection. just figured that since i have open exhaust and i am opening up the intake, that i would need more fuel. use to just add larger jets on a carb. so it just seems that more air in and more exhaust out requires more fuel. that is why i figure on larger injectors. if i am wrong i completely understand.
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Old 02-26-2014, 05:12 PM   #6
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Thats why you need a tune , you may need more fuel but you dont need larger injectors

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Old 02-26-2014, 11:10 PM   #7
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thanks tom what kind of information do you need for a tune
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Old 02-27-2014, 10:26 AM   #8
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I would need

full name
ecu code
engine mods

We can go over all that and where to get the ecu code

Tom
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