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Old 01-28-2008, 07:03 PM   #1
anewwrx
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Default Not smooth transition

I'm attaching log of 1st thru 4th gear pull. It seems when stepping on gas hard the stumbling is not a probllem but in city driving between 2 and 3k is not very smooth. Also shift from 2nd to 3rd is somewhat jerky. Can you help identify the problem? Im using enginuty logger.

http://www.box.net/shared/etlzcxoso8
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Old 01-28-2008, 07:20 PM   #2
mickeyd2005
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Wow. There are a lot of potential problems here.

Your boost target and your actual boost is totally different. Is this tuned with an MBC. Even if you are using an MBC, I would set the boost target to something closer so that other parameters that rely upon boost error are set up correctly.

AFR Learning is -9.38% and -11.72%. If the WOT MAF cale was tuned when AFR learning was 0, then this is going to lean out. In any case, you don't want such a large AFR learning because it will change your AFR at WOT depending upon how long ago you reset your ecu.

There's a lot of knock going on here. I suspect your fueling is your primary problem.
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Old 01-28-2008, 07:23 PM   #3
anewwrx
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Mickey yes there is mbc but its running the stock eceu and opensource tune. Where is the knock occuring? Could this be due to bad fuel or is it because of meth injection which im running its pulling out fuel?

Last edited by anewwrx; 01-28-2008 at 07:29 PM.
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Old 01-28-2008, 07:33 PM   #4
mickeyd2005
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Your meth injection shouldn't be active when MAFg is less than 60 g/s so it should not affect AFR learning. However, I don't know how yours is set up.

You're logging a lot of parameters and that's reducing your resolution. Some of the parameters are redundant.

You are getting a lot of knock because Feedback Correction keeps getting more negative until you let go of the throttle. That's really not good.

What are your mods? Is it one of the free tunes?

Do you have a WBO2? You should get one if you are running meth.
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Old 01-28-2008, 07:42 PM   #5
anewwrx
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What are the key values to log for better res? the meth is on starting at 10psi and it's a gt30 rotated kit. yes i need a wideband.
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Old 01-28-2008, 08:04 PM   #6
mickeyd2005
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You really need to consult a local tuner. That's a big setup and you can easily blow your engine if your fueling is messed up.

You have actually logged all the important parameters. You've just logged extra.

For example, I only log MAFv when tuning the MAF. You've already logged MAFg.

You don't need to log AFR correction and CL/OL status for WOT logs. AFR Learning A, B, C and D can be checked when you are sitting in your driveway. No need to log target boost or WGDC or TD since you are running MBC, etc... You are logging IAM, FC, and FLKC so no need to log dynamic advance or KC. You have access to your rom so no need to log base timing. Look at each parameter and ask yourself what you are going to do with it.

Last edited by mickeyd2005; 01-28-2008 at 08:13 PM.
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Old 01-28-2008, 08:07 PM   #7
anewwrx
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mickey thanks...with ur help i have a better understanding
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