EGR Valve off/on status??'

Discussion in 'SRT10 and SRT10 Coupe Discussions' started by SRT101969, Sep 9, 2013.

  1. SRT101969

    SRT101969 VCA Member - South Florida

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    OK, trying to do my first custom tune with SCT + PRP + INNOVATE O2 WB sensors data logger. How do you know EGR is ON/OFF STATUS in order to modify cells?
    As far as I collected info, modify cells USING WIDEBAND AS DATALOGGER in this order:
    1. With engine at idle.
    2. Crusing, light throttle.
    3. Moderate throttle.
    4. WOT, from 1500 to 6000rpms 3rd gear (if AFR above 12.5 stop!).

    So again, How do I know which EGR OFF or ON cells to modify in each of above 4 scenarios?
     
  2. steve911

    steve911 Viper Owner

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    The Viper motor does not have an EGR valve.
     
  3. SRT101969

    SRT101969 VCA Member - South Florida

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    I understand EGR OFF/ONN cells are used in SCT Pro Racer software to tune the car.
    Maybe not found as EGR valve under Mopar parts, but it seems this is it:
    http://www.moparpartsoverstock.com/...uum--VALVE--Emission-/6646793/04669475AB.html
    i2107415.jpg

    Anyway, there are two map tables (EGR ON/OFF) which are used to change AFR ratio in order to fine tune Vipers.

     
  4. Sonoman

    Sonoman Viper Owner

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    The duty cycle purge solenoid has nothing to do with Exhaust Gas Recirculation-- it's job is to take fumes from the fuel system that collect in the charcoal cannister and 'purge' the canister of fumes by letting them get drawn into the engine. I suppose the tuning map could compensate for the solenoid on Vs. off state, but it would be a small compensation. Does anyone know what operating conditions open the purge valve?
     
  5. SRT101969

    SRT101969 VCA Member - South Florida

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    This is a SCT PRP software window. There are two tables with cells in order to add or substract fuel: EGR OFF and EGR ON, this pic displays EGR OFF table. After reading Steve as Sonoman posts:2tu:, there's NO EGR valve. So I am going to do some testing in order to find out which table is the one to consider for tuning my car.
    So my first asumption there was an EGR valve is WRONG.:omg:
    Thanks!


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