Subaru EJ20T - Cold cranking ignition advance

reub VWRX is gone...

2,054 posts · joined Sep 2002 · 5 Feb 2006, 11:22 am

#453676

Hi,

Can anyone confirm the cold cranking ignition advance for a subaru ej20T?

I'm currently having problems where I'm getting massive kick back when attempting starting my car. The current advance I think is 7 degrees...

Any help is appreciated. Cheers.

Reub

1303 Officially Full-On Dubber

250 posts · joined Sep 2003 · 5 Feb 2006, 3:17 pm

#453740

Symptoms of too much advance....is it worse when hot?

I had this problem AFTER I paid $$ to have mine professionally tuned. The tuner had set the timing to 27 degrees at idle.

Factory timing at idle is 18 degrees + or - 10( eg Factory management will adjust depending on temp etc).
I use EMS so yours may be a little different, but I have set mine a little lower at 17 degrees so it idles low (900 rpm) when hot.(also use Air Idle valve control)

Then to help it idle when cold I use the Temperature compensated Ignition advance adjustments and add 20% Timing from 0-40 degrees C, which equates to a touch over 19 degrees advance. I found if I gave it anymore timing than about 20 degrees it would kick back on cranking....especially when hot. The only thing I have to be concious of is if I start flogging it under 40 degrees C it will be adding more timing under boost.
Hope this helps.

Cheers Paul.

reub VWRX is gone...

2,054 posts · joined Sep 2002 · 5 Feb 2006, 7:10 pm

#453802

1303 wrote:Symptoms of too much advance....is it worse when hot?

I had this problem AFTER I paid $$ to have mine professionally tuned. The tuner had set the timing to 27 degrees at idle.

Factory timing at idle is 18 degrees + or - 10( eg Factory management will adjust depending on temp etc).
I use EMS so yours may be a little different, but I have set mine a little lower at 17 degrees so it idles low (900 rpm) when hot.(also use Air Idle valve control)

Then to help it idle when cold I use the Temperature compensated Ignition advance adjustments and add 20% Timing from 0-40 degrees C, which equates to a touch over 19 degrees advance. I found if I gave it anymore timing than about 20 degrees it would kick back on cranking....especially when hot. The only thing I have to be concious of is if I start flogging it under 40 degrees C it will be adding more timing under boost.
Hope this helps.

Cheers Paul.

Cheers Paul....I will have a review of what mine is now set at. Had a bit of a play and did essentially what you've suggested. I appreciate your response.
Reub

Reub