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Evo X Tuning Discussion for tuning & engine control systems that are unique to the Evo X. IF THE TOPIC IS COMMON WITH OTHER LANCERS, PLEASE POST IT IN: '08+ Lancer Common.

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Old 01-21-2013, 05:26 PM   #1
BADFISH6
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Stock X Overboosting
Car is 100% back to stock on stock ROM. Im certain the OEM bcs is hooked up properly and both boost pills are in the lines. Car is seeing 28 psi and almost 300 load. Strange thing is its not throwing over boost codes, not going into limp mode, and the clutches are staying closed. Log attached. Any ideas?
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File Type: csv EvoScanDataLog_2013.01.19_20.24.32.csv (13.5 KB, 27 views)
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Old 01-21-2013, 07:06 PM   #2
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Do a pull from 2500 and see if it overboosts, if it does, I'd bet it's not as bad.

You aren't hitting boost cut b/c you have to overboost for X amount of time before boost cut hits. In your case the car is correcting the boost downward very quickly. I believe on stock tunes it's 1.5 or 2 seconds, but I'm not 100% sure.
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Old 01-21-2013, 07:19 PM   #3
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My stock 2012 map it's 1 sec and it looks like he's only over the limit for .6 sec or so on lines 20-25
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Old 01-21-2013, 10:40 PM   #4
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Quote:
Originally Posted by HappyMint View Post
Do a pull from 2500 and see if it overboosts, if it does, I'd bet it's not as bad.

You aren't hitting boost cut b/c you have to overboost for X amount of time before boost cut hits. In your case the car is correcting the boost downward very quickly. I believe on stock tunes it's 1.5 or 2 seconds, but I'm not 100% sure.
Im a little nervous to do a pull from that low if something isn't right. Even if it doesn't overboost as bad from 2500 rpms, this is still way higher than stock boost should be correct?
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Old 01-21-2013, 10:54 PM   #5
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how long ago did you put the stock rom on ? try driving grama style for a few hours and then report back...
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Old 01-21-2013, 11:10 PM   #6
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how long ago did you put the stock rom on ? try driving grama style for a few hours and then report back...
Oh It's had plenty of time. I put it on 2 weeks ago and it's probably been 500 miles.
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Old 01-21-2013, 11:23 PM   #7
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Are you running stock rom with aftermarket exhaust,intake, or BOV?
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Old 01-21-2013, 11:27 PM   #8
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He said it's 100% stock.
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Old 01-21-2013, 11:44 PM   #9
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Quote:
Originally Posted by Eyler_Evo_X View Post
He said it's 100% stock.
Lol, thank you

Edit: well actually I lied because I still have an UICP and walbro 255 in the tank. But those shouldn't effect anything.
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Old 01-22-2013, 07:58 PM   #10
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Can anyone tell if this is the stock boost pill? I cant find any pictures of it.


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