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Need help with IAT and ECT compensation S300

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Old Nov 19, 2012 | 04:15 PM
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Icon2 Need help with IAT and ECT compensation S300

My current tune was tuned when IAT was 80* now it is around 55* and my car idles and cruises at 10.5 and cruises at around 12.5 for a good 15 minutes until it is pretty warmed up and I was wondering if somebody could help me with the compensations here. Ive read that the stock compensations work well, but in my case it isnt. Any help is appreciated.


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Old Nov 19, 2012 | 05:17 PM
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Default Re: Need help with IAT and ECT compensation S300

anybody? these are the stock values, wondering if anybody could point me in the direction on where to put them?
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Old Nov 19, 2012 | 06:38 PM
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Default Re: Need help with IAT and ECT compensation S300

Just reduce the values in the IAT temp cells 67* and below.

Last edited by Muckman; Nov 20, 2012 at 05:29 AM.
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Old Nov 19, 2012 | 08:29 PM
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Default Re: Need help with IAT and ECT compensation S300

Ect only or IAT also?
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Old Nov 20, 2012 | 05:30 AM
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Default Re: Need help with IAT and ECT compensation S300

Start with just the 3 IAT load rows. I would reduce those values significantly.
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Old Nov 20, 2012 | 07:08 AM
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Default Re: Need help with IAT and ECT compensation S300

Thanks for the input. Every bit helps. Now sorry if this sounds stupid, but say I'm trying to decrease the 60* portion, do you change the box nearest to 60 or do you manually change the number in the temp box and then change the %.. Because it jumps from 67* to 123* on the table above lol
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Old Nov 20, 2012 | 07:15 AM
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Default Re: Need help with IAT and ECT compensation S300

You can grab the value below the 67* column. Cut em in by 1/3 to 1/2.
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Old Nov 20, 2012 | 08:46 AM
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Default Re: Need help with IAT and ECT compensation S300

Thanks man, will try later
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Old Nov 20, 2012 | 02:25 PM
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Default Re: Need help with IAT and ECT compensation S300

did what you said, fixed 90% thanks man!
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Old Nov 21, 2012 | 05:25 AM
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Default Re: Need help with IAT and ECT compensation S300

Stock values usually work pretty well...if your part throttle was tuned to 14.7 and now its 12.5 or richer, you have some other issue going on.
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Old Nov 21, 2012 | 05:50 AM
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Default Re: Need help with IAT and ECT compensation S300

Originally Posted by xenocron
Stock values usually work pretty well...if your part throttle was tuned to 14.7 and now its 12.5 or richer, you have some other issue going on.
Originally Posted by bvillarreal
cruises at around 12.5 for a good 15 minutes until it is pretty warmed up

Last edited by mtber; Nov 21, 2012 at 07:06 AM.
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Old Nov 21, 2012 | 10:26 AM
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Default Re: Need help with IAT and ECT compensation S300

Yeah I read that the stock values usually do work well. But then again I read that if you have bigger injectors it'll throw it off in the changing of the weather. I didn't mean to put 12.5 I meant 11.5 until it's All the way warmed up. Just was wondering if there's anyway to get the fuel the same 24/7. Anyways I'm not messing with it at all anymore, gotta save up for a real tuner.
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Old Nov 21, 2012 | 02:10 PM
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Default Re: Need help with IAT and ECT compensation S300

Originally Posted by bvillarreal
Yeah I read that the stock values usually do work well. But then again I read that if you have bigger injectors it'll throw it off in the changing of the weather. I didn't mean to put 12.5 I meant 11.5 until it's All the way warmed up. Just was wondering if there's anyway to get the fuel the same 24/7. Anyways I'm not messing with it at all anymore, gotta save up for a real tuner.
While the car warms up, you want it to be richer...thats what you have a coolant temp sensor for...it is there to add extra fuel while the motor is cold since the atomization isnt as good, and the motor will need extra fuel to run properly.

If it runs at 14.7 cruising once fully warm...thats what it is supposed to do!
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Old Nov 22, 2012 | 07:03 PM
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Default Re: Need help with IAT and ECT compensation S300

Originally Posted by bvillarreal
gotta save up for a real tuner.
good option.
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