EvocentriK Posted September 8, 2020 Report Share Posted September 8, 2020 Hi, just wondering if anyone can assist with this. The stock Evo ecu triggers this solenoid to open under certain conditions (I believe it to be on cruise) allowing the intake manifold vacuum to pull tank fuel vapour into the intake manifold. The solenoid is closed under other driving conditions. There is also a check-valve between the solenoid and the evap canister in the engine bay (JDM vehicle). It is labelled Evapourative Emission Purge Solenoid in the attached diagram. Does the Link G4+ PNP ecu also have logic to control this solenoid in the same way as OEM? I am installing an aftermarket intake manifold and trying to do the right thing here and retain this system if possible, but there's no point custom mounting the solenoid and running wiring/vac line if its not activating. In the same vein, does the Link ECU also activate the Fuel Pressure Solenoid on hot starts? Thanks! Quote Link to comment Share on other sites More sharing options...
Confused Posted September 8, 2020 Report Share Posted September 8, 2020 There is a Purge option you can choose for an Auxilary Output. The help file outlines when it activates: It does not use the FP solenoid, so that can be safely removed! All of the necessary compensations for this can be programmed using the existing functionality. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 8, 2020 Report Share Posted September 8, 2020 The purge valve is connected to pin 9 which is not connected to anything in our ECU. But if you wish to use it you will just have to connect or move that wire to a spare aux output. Quote Link to comment Share on other sites More sharing options...
EvocentriK Posted September 9, 2020 Author Report Share Posted September 9, 2020 Thanks gents, much appreciated. I’ll delete the FPR solenoid and rewire pin 9 to an AUX configured for purge. Quote Link to comment Share on other sites More sharing options...
FDFRory Posted September 26, 2022 Report Share Posted September 26, 2022 Curious on this same thing as well. What type of aftermarket solenoid do you recommend buying? Quote Link to comment Share on other sites More sharing options...
EvocentriK Posted July 23, 2023 Author Report Share Posted July 23, 2023 On 9/27/2022 at 9:47 AM, FDFRory said: Curious on this same thing as well. What type of aftermarket solenoid do you recommend buying? You've probably sorted this out by now but I'd just grab a used one from a wrecker from any car and try it. Quote Link to comment Share on other sites More sharing options...
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