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-   -   smog with jb4 and band end flash? (https://www.n54tech.com/forums/showthread.php?t=62997)

Riceball777 08-13-2020 02:43 PM

smog with jb4 and back end flash?
can i pass CA smog with a jb4 and with the back end flash?? I know many people have passed with just the jb4 switched to map 0 but can i pass with the jb4 with the back end flash? or do i need to flash back to stock swap out the 3.5bar map sensor with stock and switch jb4 to map 0 to pass?

dmckmc 08-13-2020 06:23 PM

Monitors must be set ready to pass (drive cycle complete). Also, emissions for Catalyst and O2 sensors must be supported in the flash/tune you have on the dme or the State computers will ‘flag’ and fail the car outright.

This means if you have MHD, flash with ‘OEM/Ca tted D Ps’ checked, yes checked. Or back to stock if you have manipulated or tuned out the ca ts/secondary O2s with TunerPro.

I don't believe the JB4 (USA) settings will make a difference though you may need to experiment or require a d p fix with your setup to enable monitors to set ready for emissions tests.

You have an extensive mod list so visual inspection could be problem as well.

Riceball777 08-13-2020 07:17 PM

I normally been just doing illegal smogs for the last 20+ years but it’s been getting much harder to be able to do illegal smogs, this is my first time trying to actually pass a smog test. I have friends that own smog shops so I won’t have to worry about the illegal visual things like the intake, blow off valve and thing that don’t affect the readiness of the monitors. My only monitor that is not ready is for the cats since I don’t have cats on my car so I will just install the o2 fix or I can install the stock down pipe’s

My question is after I install the stock down pipe will I be fine with JB4 in map 0 or with the off the self mbd back end flash cause me issues?

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