[Difficult cold start with E85 - WRX6]

@koracing,

Alright, I'll try with some more pre-crank prime enrichment

My problem with open loop is every time I think I have good numbers, it doesn't work the following time. For example, with afternoon I did this log. With the stepper motor at 30% and engine at operation temperature. It worked well. I stopped the car and started it again and then the engine was very on RPM at idle for the same conditions of stepper position, MAP and temperature. However, as it was lower on RPM the ignition advance was lower, following to the Base Map ignition.

I tried to hit the throttle to see if changes something but didn’t.

Idle30Perfect_Restart30NOK-11-28 4;55;59 pm.llgx

[Difficult cold start with E85 - WRX6]

@Ben C,

Thanks for the tip, I added enrichment and it's much better, perfect in some cases and a bit longer under 10°C. I'm waiting for colder than 10° weather to confirm my settings works.

 

@koracing,

I'm using the stock 440cc WRX V6 injectors.

Sometimes the check engine light comes because the injection have reached 102% injector duty cycle but I think I'll just decrease the boost to do not have to change the injectors.

 

I'm more focusing on Idle settings now and it's horrible now it can work properly one day and don't on the following one...

If you have any tip for Idle Control with a stepper motor, I'll be please to read you!

 

There the Cold Start values i'm using now:

[First Cold Weather Today]

Hi @Cbrandenburg,

 

Can you show me witch the adjust you did to make it work?

I have difficult start at cold weather with E85.

 

Thanks

[Difficult cold start with E85 - WRX6]

Hi all,

I'm a just a beginning to learn how to tune but I need to fix a problem before I go farther.

 

Today I parked my Impreza outside for the first time and it was cold with frost.

I could start it only after 7 crank 3s long...

 

How can I make the startups easier? Should I add ethanol at pre-crank prime and crank enrichment?

 

Can you send me settings that works properly with E85?

 

This is my actual settings

[Wiring from AEM UEGO gauge to ECU]

@Adamw,

My gauge is an 30-0300 X-series UEGO with Bosch LSU4.9

@neo277,

ok good to know the analogic connection works fine. I prefer the numeric way to do it in case some interferences disturb the values I read in the ECU.

[Wiring from AEM UEGO gauge to ECU]

Hi everyone,

 

I have an Impreza GT 2000 (same as WRX6) and a G4X WRX6X ECU.

I'm also running an AEM UEGO gauge wideband and I like to connect it to my ECU.

 

Does the CAN 1/RS232 is the best solution? I didn't found the voltage of both devices for RS232 and I don't want to damage the ECU.

Or maybe the analogic 0-5V is more simple?

I've been thinking to connect the ECU directly to the sensor but I don't know if it's possible to have 2 devices riding on the same sensor. Any idea?

 

Thanks a lot