JRSC Si Help

[Nfurno]

My friend just had a jrsc installed in his car and is thowing codes for:

O2 sensor
Lean fuel mixture

Do you guys have any suggestions on what could be the cause and what he can do to fix the problem?

Thanks in advance

[lundgren]

Bad o2 sensor.
Incorrect install of JR riser.
Bad pump.
Bad injector
injectors plugged in wrong.

How is the idle?

Don't push the car lean.



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[Nfurno]

He says the idle is fine and the car runs real strong, he just trowing the code. I told him what you suggested lundgren and he's going to check that out tomorrow. Thanks again.