Cold Start Trim Question

minchm · Post by **minchm** » Fri Mar 12, 2010 9:08 am

Hi can anyone tell me how long the Cold Start Trim stays on for and what temperature brings this in as i cant see any reference to that in the help section. Say I set it at 10% does this mean that it gets an extra 10% on top of what extra fuel is applied via coolant adjustment for the given temp in the table.

Thank you.

Post by **Spunkster** » Fri Mar 12, 2010 10:24 am

adding 10% will give it an additional 10% over any other compensations.

minchm · Post by **minchm** » Sat Mar 13, 2010 1:42 am

double post.

minchm · Post by **minchm** » Sat Mar 13, 2010 1:43 am

Many thanks for that can you tell me what actually triggers the cold start fuel trim is a set temp and how long it lasts for, eg is it a 30 second addition of fuel ?

Thanks again.

Post by **Spunkster** » Mon Mar 15, 2010 3:26 pm

It is determined by the temprature and lasts until the temperature rises to a safe operating temperature.

minchm · Post by **minchm** » Wed Mar 17, 2010 11:53 am

Thank you for replying Spunkster. I may be asking a stupid question but I cant see what the temperature level is that triggers the cold start fuel trim is it adjustable in a table if so can you kindly point me in the right direction.

Many Thanks.

Post by **Spunkster** » Wed Mar 17, 2010 12:47 pm

No this is not adjustable. I do not know all the factors that trigger a cold start condition.

minchm · Post by **minchm** » Thu Mar 18, 2010 12:09 am

Thank you. I will experiment with the Cold start fuel trim then.

If I find out anything more I will post back in this thread.

Once again thank you for your replies.

Funbar · Post by **Funbar** » Fri Mar 26, 2010 10:15 am

Is there anyway of boosting the Cold start RPM?

For example.. When in stock form, The motors will start and rev up to about 1500-1700rpm then as the motor and ECT rise, the RPM's decrease.

When I installed s300, I've never been able to get the tune to do the same thing. When I start my car, It idles around 400-500 rpm and then gets higher after about a minute or two of idling.

Any way to fix this?