California vs Federal emissions
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The 5.9 is going into a california emissions vehicle so it already has all of that, i was just wondering if i’d have to change anything because the engine is from a federal emissions vehicle
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Now, I am not 100% sure on this... but.... If the down pipes from the 3.9 (which is where I assume the cats are) line up with the 5.9 exhaust manifolds...... I think you can just add the two additional injector circuits to the existing wiring, extend any wiring that won't reach where it needs to be, and have the PCM flashed with the 5.9 cali emissions tune, and you *should* be all set. I don't think anything externally on the motor was different, but, I haven't seen one either. Does your 3.9 have EGR? An AIR pump?
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Now, I am not 100% sure on this... but.... If the down pipes from the 3.9 (which is where I assume the cats are) line up with the 5.9 exhaust manifolds...... I think you can just add the two additional injector circuits to the existing wiring, extend any wiring that won't reach where it needs to be, and have the PCM flashed with the 5.9 cali emissions tune, and you *should* be all set. I don't think anything externally on the motor was different, but, I haven't seen one either. Does your 3.9 have EGR? An AIR pump?
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I recently moved to Cali with my 3.9 2001. I had to pass an emissions test that was administered by a lone employee at a small shop near the dmv. He performed a brief visual inspection and ran the truck on rollers (not sure why) and passed me. The dmv also did a visual inspection of the engine bay but mostly looked for the CA compliance stickers and took down that info. I don’t think either of the inspectors would have known or cared if it was the original engine. They certainly didn’t ask.
Hope this helps.
Hope this helps.
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