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Old 06-01-2011, 01:36 PM   #1
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Default MAT Table Correction on MSPNP

Does anyone know if adjusting the MAT correction is possible on these boards? When I open tuner studio there's an option in the "Extras" section for it but when I load my project it disappears. I'm assuming this is for MS2 or MS3 but I'd kill right now to find a way to adjust it.

I've been working with the coolant related air density but that seems (and works) like a band aid at best. It's helped but by no means is a cure.
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Old 06-01-2011, 01:43 PM   #2
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what?!

you use the coolant-related air density table and switch it ait based under options.
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Old 06-01-2011, 01:45 PM   #3
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I have but a few problems still persist. I have the corrections cranked but I still get horrible heat soaked starts and it still begins to lean out after sitting at a light for a while.

My goal is to have a tune that will work year round (something that seems impossible on the mspnp units). I'm sooo close but this one issue seems to be persistent.
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Old 06-01-2011, 01:53 PM   #4
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where is your AIT sensor located? that's the biggest help.

You need to tune on a nice day without any AIT based enrichments, then fine tune them to keep your AFR consistent when the temperatures do increase. the interal MS code will want to pull fuel, but it's a bit agressive. Once you do this, you really shouldnt ever need to tune all year long. Otherwise your are altering your fuel map based on AIT temperature, and you will have to.
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Old 06-01-2011, 01:58 PM   #5
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It's installed in the dummy throttle. I know that's a terrible place but I wasn't aware when I did the install.

I'll give that a shot, hopefully we'll get a few days here soon when the temp drops below 90 and I can spend some time with it. I do remember having the sensor unplugged once and it seemed to help but I was green and figured it was probably there for a reason and plugged it back in.

I also developed a misfire at idle when things got hot that I'm dealing with. I switched to cooler plugs (1 step) and I'm wondering if closing the gap a little will help.

It's really odd, when it's cold out the car idles at 1KRPM, when it's hot it idles at 850 but misfires. My idle timing is at 15 degrees so I don't expect that's the problem and the fuel is dead on 14.0 (even when misfiring).

Sorry, I know that last bit was off topic but it never hurts to get some feedback.
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