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94170008 to 94170015 = no more cruise p0300

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Old Jul 24, 2008, 03:28 PM
  #16  
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If I were to upgrade to 0015, all I would have to do is copy my immobilizer code over and all of my modified maps correct?
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Old Jul 24, 2008, 04:34 PM
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yes.
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Old Jul 24, 2008, 04:45 PM
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Is there an easy way to do this?

I have the 008 rom and would like to put in the 0015 with all the mods, but have no idea how to do it.
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Old Jul 24, 2008, 08:47 PM
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Originally Posted by razorlab View Post
I've upgraded quite a few 03's to 015 and they still get P0300.

Consider yourself lucky.

yeah, I am one of those. I suspect that for me it's the transmission noise, and at 100k miles I am due for a tranny rebuild according to the service manual. Another cause might also be my lightweight flywheel causing problems. I hope to have all this done before the year is out (and before I need to smog the car)

I might try to play with the knock sensor filters, but at this point with tephra's CEL knock light, it's not a huge priority.
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Old Jul 24, 2008, 08:53 PM
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Well I think I've completely recreated my -08 ROM into a -15 ROM. I'll upload it tomorrow. I did notice a significant difference between the Knock Sensor Filter #1

Here's to hoping all goes well.

Last edited by Jumperalex; Jul 24, 2008 at 09:04 PM.
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Old Jul 24, 2008, 09:40 PM
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Originally Posted by Smogrunner View Post
Results?? It has completely eliminated the knock, the p0300, and the studder. I cannot replicate it regardless of how hard I try. I recommend any and all folks experiencing this problem to either do this upgrade yourself or have a trusted tuner do it for you.
I did the same thing and also got rid of the partial throttle 5th gear knock at cruise. Now I get it at idle I've found bumping the timing at idle helps a lot, but it will sometimes throw the code at idle with the AC on. YMMV.
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Old Jul 25, 2008, 04:55 AM
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Originally Posted by Jumperalex View Post
Well I think I've completely recreated my -08 ROM into a -15 ROM. I'll upload it tomorrow. I did notice a significant difference between the Knock Sensor Filter #1

Here's to hoping all goes well.
There is no difference on filter 1, most 008 have the wrong table address changing it to 485b makes it look the same.
The 08 vs 14/15 changes can't be seen thru the regular table defs.
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Old Jul 25, 2008, 05:13 AM
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ahh intersting. When you say "most 008 have the wrong..." you mean most 008 Evoscan xml I assume?
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Old Jul 25, 2008, 05:22 AM
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Correct
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Old Jul 25, 2008, 05:30 AM
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Originally Posted by Jumperalex View Post
ahh intersting. When you say "most 008 have the wrong..." you mean most 008 Evoscan xml I assume?
ECUFLASH XML for that 0008 rom has the wrong address for knock filter 1
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Old Jul 25, 2008, 05:48 AM
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First it is great seeing some of the old school members in here. WHAT'S UP DUDE?

I'd like to know if anyone who has done the 0008 to 0015 still gets the steady state p0300 during steady fifth gear cruising. I have one more day under my belt (~160 miles of driving since the mod) and still no p0300. Before this mod, I'd get it every day.

Also, I like to thank tephra for the knock CEL. It has made it incredibly easy to discern randon knock that I needn't concern myself with with consistent problems that occur regularly. Sometimes, when looking at long rambling logs, you don't get a clear mental picture of what exact driving condition causes the knock.

For example, I now know that the fairly regular knock between 2700 and 3400 rpms is only in first and second gear is ALWAYS during soft acceleration (pulling away from stop signs and signals). I have been working on this issue for a while, but can't seem to get rid of it. I've already pulled a lot of timing in the middle area of my map. But I'm gonna need to try other approaches or just live with it.... The CEL knock light has really helped identify the "situation" where it occurs. Of course I'm also always keeping an eye on the light during WOT pulls too.
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Old Jul 25, 2008, 06:32 AM
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No P0300 here though I never really got them with the 0008 ROM. The only time I would see the code was during idleing and low RPM low load. This was due to increased timing in those cells to try and help the cams a bit.

Ive since backed it off and havent gotten the code in 6k+ now
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Old Jul 25, 2008, 06:32 AM
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Again, interesting. One thing I did notice in playing with the 015 xml in prep to load the 015 ROM is that the xml Table Names don;t always match the instructions that go along with it.

That is to say, reading the direct boost and JDMMAP instructions (for example) for the 008 ROM instruct you to change "Blah blah blah" line from XXXX to YYYY. In the 008 xml the Table Names match the instructions. But in the 015 xml the Table Names are not "Blah blah blah" but intead are "Yadda Blah Yadda" The difference wasn't so bad that I couldn't figure it out but they were different enough to give me pause.

And why did I use Blah and Yadda, because I don't have the actual stuff in front of me here at work :O hehe
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Old Jul 25, 2008, 06:35 AM
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PS, I have an 03 VIII with 008 and to the best of my knowledge I have never gotten at p0300. But I have noticed some of the other studder / stumble problems I've heard described and am hoping this solves it.

Smoggrunner, are you talking about me as an "old school tuner"?
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Old Jul 25, 2008, 07:29 AM
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Originally Posted by Smogrunner View Post
For example, I now know that the fairly regular knock between 2700 and 3400 rpms is only in first and second gear is ALWAYS during soft acceleration (pulling away from stop signs and signals). I have been working on this issue for a while, but can't seem to get rid of it. I've already pulled a lot of timing in the middle area of my map. But I'm gonna need to try other approaches or just live with it.... The CEL knock light has really helped identify the "situation" where it occurs. Of course I'm also always keeping an eye on the light during WOT pulls too.

I get the knock at low acceleration too and in the same areas. At this point, I think it's transmission or clutch noise as I seem to almost always see it around the 1st to 2nd shift. Unfortunately, I'm pretty sure the ECU thinks it's real knock and adjusts accordingly.
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