DenisAlmos Posted February 9 Report Share Posted February 9 I'm using a V6 engine in a V4 WRX My problem is I can't control idle because the car wiring is a 3 wires for a solenoid I suppose and the throttle body is supposed to have a 4 wires stepper motor. Can you confirm if V3-V4 G4X is able to control a stepper motor? If not do you think another solenoid can fit the Subaru throttle body? I’ve been using rotational idle but engine don’t warm up over 50°C so it’s not ideal for a track day car. Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 10 Report Share Posted February 10 No you want be able to do a stepper motor with the V3/4 plug-in, it doesnt have Aux 5 or 7 available or the ECU hold power circuit to reset the idle valve after power off. I dont know the interchangeability of the various manifolds/throttles/idle valves for the early EJ's very well so cant off much advice on the hardware, but you will need a 2 or three-wire idle valve. DenisAlmos 1 Quote Link to comment Share on other sites More sharing options...
dx4picco Posted February 11 Report Share Posted February 11 I would hazards guess you should put a new age TB at least (or with manifold as it has same head pattern as V5-v6). New age TB needs only one aux and PWM. DenisAlmos 1 Quote Link to comment Share on other sites More sharing options...
DenisAlmos Posted February 13 Author Report Share Posted February 13 Thank you @Adamw @dx4picco what engine code or model and year are you talking about? Quote Link to comment Share on other sites More sharing options...
koracing Posted February 13 Report Share Posted February 13 On 2/10/2024 at 1:57 PM, Adamw said: No you want be able to do a stepper motor with the V3/4 plug-in, it doesnt have Aux 5 or 7 available or the ECU hold power circuit to reset the idle valve after power off. I dont know the interchangeability of the various manifolds/throttles/idle valves for the early EJ's very well so cant off much advice on the hardware, but you will need a 2 or three-wire idle valve. Is there any issue setting the stepper to reset at key on instead of using a hold power to reset at power off? Quote Link to comment Share on other sites More sharing options...
dx4picco Posted February 13 Report Share Posted February 13 should be from any wrx or sti before DBW cars Quote Link to comment Share on other sites More sharing options...
DenisAlmos Posted February 19 Author Report Share Posted February 19 As my car as a circuit breaker it makes more sense to set the stepper motor reset at ECU wakeup than hold power anyway It’s not a problem for me to wait a second before startup Quote Link to comment Share on other sites More sharing options...
KennyJ Posted February 20 Report Share Posted February 20 those steppers are a pain , even if they work i bypassed many of them , just block them and cut a groove in the rubber use idle ignition or rotational idle as a solution if its not a road car you can setup a virtual aux with ect temp >78°c as activation for example DenisAlmos 1 Quote Link to comment Share on other sites More sharing options...
DenisAlmos Posted June 10 Author Report Share Posted June 10 On 2/20/2024 at 7:05 PM, KennyJ said: those steppers are a pain , even if they work i bypassed many of them , just block them and cut a groove in the rubber use idle ignition or rotational idle as a solution if its not a road car you can setup a virtual aux with ect temp >78°c as activation for example I understand your position, thanks for your advice. As mentioned above, with rotational idle the engine doesn’t warmup, not good for a track day car that’s going to run a few laps, it needs to perform quickly. Unfortunately, ignition idle was way out of range, the engine sits at too high with a throttle set for startups. Maybe I can find an intermediate position to make ignition idle to work. As another solution, I saw a Group A Subaru with a manual cable command for anti-lag using the OEM speed regulator cable attachment on the throttle. Maybe I can use this solution for startup only, like a starter on carburetors but an automatic solution always is sexier. Quote Link to comment Share on other sites More sharing options...
KennyJ Posted June 10 Report Share Posted June 10 many 90's nissan have a automatic closing valve working like an electric inverted thermostat , but for air you feed it 12v and it closes over time ca18 had it , rb20 rb25 ... DenisAlmos 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 10 Report Share Posted June 10 I would either fit the later EJ throttle which has the single aux idle valve as Dx4picco suggested above or use a common bosch 2 or 3 wire valve that have simple hose barb type connections. DenisAlmos 1 Quote Link to comment Share on other sites More sharing options...
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