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Thread: 98SL Chromed ECU missing stuff

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    98SL Chromed ECU missing stuff

    I remember a very long post with multiple opinions about the knock circuitry between the VR4 and SL boards, well I got a chromed SL with the TT flash, working fine except one thing that for me its worth, Low-High fuel pump control, also missing the active exhaust but my muffler stuck open (Actually the valve if it's still there just opens freely with no change) not a big deal, but I'm looking at the trims and the fuel pressure gauge and it's really affecting the base pressure always on hi, don't want an adjustable FPR and startup issues..

    So, I remember from that post that someone showed the circuit differences and missing components for the VR4 features, did someone got a picture from a real 99VR4 board (good resolution one) or if they have that info that got lost (or deleted, I understand that was causing lots of confusion), just wanted to add the fuel control circuitry.

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    The differences are the noise filters.

    It wouldn’t surprise me if your Active Exhaust works with that ECU but you do have to enable it in the software first.

    2014 Exomotive Exocet - #101 "shocker yellow" - 1.8L 5-speed 3.9 torsen FMII powered
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    99 Solano Black VR4 - #16 of 287 - ground up restoration - sold
    98 Pearl White VR4 #54 of 231 - 12.84@105mph - 93 Octane 12.50@107mph - 100 Octane with Chromed ECU - sold
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    98 Black VR4: 100% stock - totalled by an Illegal 2-12-08
    95 White Stealth TT - 11.852 @ 118.25 - sold
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