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May 21, 2009, 09:13 AM
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#1
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Evolved Member
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Location: Oak Harbor, WA
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Drives: '05 Tarmac Black SSL VIII
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VIII patch to reset fuel trims?
Would it be feasible to create a patch for the VIII guys to reset fuel trims via ECUflash or Evoscan instead of disconnecting the battery? This would be a very helpful mod! I am not a dissasembler and at most an intermediate user for both programs... If possible can the patch be available to the 006 and 0011 roms... I don't use map switching so I have no need for the 006 rom...
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FP Red*Greddy ProfecB Spec II*HKS TT*Nesei Short Route IC Piping*Synapse BOV*COMP 272s*Injen Intercooler*AFE Power Dry Filter*R/TErnie Intake*R/TErnie FULL 3" O2 housing with V-band*R/TErnie Modified DCsports 3" Down/Test/Flexpipe with V-Band*Greddy Ti-C Exhaust*255lph*Tein S-Techs*18" Volk LE-28s*Progress 25mm Rear Sway*Project Mu pads*JDM Tails*Cusco Heat Shield*Mishimoto Radiator hoses/Cap*ARC shift knob*Injector Dynamics 1000cc...
Last edited by Fast_Freddie; May 21, 2009 at 10:33 AM.
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May 21, 2009, 09:24 AM
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#2
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Join Date: Dec 2006
Location: D
Posts: 311
Drives: 05 VIII Tarmac Black
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^x2
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05 TB EVO8
|Helix 272's|Helix Cam Gears|Helix Exhaust|PPI Intake Tube|PPI UICP|EPM LICP|APEXi Air Filter|APEXi AVC-R|Megan V2 DP and Testpipe|APS BOV|Works Short Shifter|Zaklee Bushings and clear cam gear cover|Walbro FP|EPM O2 Dump|PPI Ported/Swain Coated Exhaust Manifold|PPI ported Hotside|FP Ported and Polished Green|FIC 1050s|LC-1 Wideband|CA670 Remote Start|Exedy Twin HD|4WS Tuned
Tuned 93 at 25psi, now tuning E85 at 30!! ;)
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May 21, 2009, 09:41 AM
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#3
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Location: Willmar MN
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Drives: 98 Eclipse GSX w/ Evo8 ECU
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That would definitely be handy.
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May 22, 2009, 09:57 PM
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#4
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+1, I didn't know the VIII doesn't reset the fuel trims 
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2003 BBY/Black 2-Tone EVO V///
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Originally Posted by JohnBradley
Where do people come up with this stuff? If they are in the know they deserve to get kicked in the junk for not keeping their mouth shut. Conversely they deserve to get kicked in the nuts for teasing us. Either way someone needs kicked in the nuts
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May 23, 2009, 10:08 AM
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#5
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The IXs reset trims on a reflash, the VIIIs only reset when you pull power from the ECU.
I've always thought resetting the trims on a map switch (in tephra's modified ROMs) would be a reasonable thing to do, since presumably you're making a significant change with the switch.
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May 23, 2009, 10:25 PM
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#6
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Location: Oak Harbor, WA
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Drives: '05 Tarmac Black SSL VIII
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^ Thats what I am saying... especially with scaling inectors...
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FP Red*Greddy ProfecB Spec II*HKS TT*Nesei Short Route IC Piping*Synapse BOV*COMP 272s*Injen Intercooler*AFE Power Dry Filter*R/TErnie Intake*R/TErnie FULL 3" O2 housing with V-band*R/TErnie Modified DCsports 3" Down/Test/Flexpipe with V-Band*Greddy Ti-C Exhaust*255lph*Tein S-Techs*18" Volk LE-28s*Progress 25mm Rear Sway*Project Mu pads*JDM Tails*Cusco Heat Shield*Mishimoto Radiator hoses/Cap*ARC shift knob*Injector Dynamics 1000cc...
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May 24, 2009, 12:41 AM
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#7
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7's are the same, only resets from the battery.
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May 24, 2009, 11:00 AM
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#8
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Drives: 98 Eclipse GSX w/ Evo8 ECU
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I would think a variable could be changed that would force the ECU to boot up from the beginning the next time, clearing the trims.
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May 24, 2009, 01:58 PM
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#9
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If I have understood clearing of DTC completely, clearing CEL should reset fuel trims also, can you try sending MUT_FA, MUT_FC down the line, one of them should clear trims, cannot remember which one now, but both clear CEL, no harm testing them.
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May 25, 2009, 04:05 AM
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#10
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Mattjin can you test it?
i.e.
Send custom request FA
Send custom request FC
via EvoScan or via Custom Tab in MutMonitor.
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May 25, 2009, 05:23 AM
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#11
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Might give it a shot tomorrow. This will actually be very helpful with the LT trim discovery, saving me from disconnecting the battery each time.
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May 25, 2009, 11:49 AM
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#12
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Just tried and clearing cel in evoscan does not reset the fuel trims on my 05.
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May 25, 2009, 07:29 PM
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#13
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I cleared a DTC code today and the trims got reset. After a 10 minute drive I cleared DTC with no codes and the trims did not reset again. I'm thinking trims only reset if a DTC is triggered off then cleared. This was on a 03 VIII.
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May 25, 2009, 10:31 PM
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#14
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Thanx, ^ this is what I wanted to be tested. So it seems we need a patch. I will try to find some easy way, if there is one.
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May 25, 2009, 10:38 PM
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#15
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Thanks acamus... Sorry I didn't provide any help, I have been in Seattle all weekend...
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FP Red*Greddy ProfecB Spec II*HKS TT*Nesei Short Route IC Piping*Synapse BOV*COMP 272s*Injen Intercooler*AFE Power Dry Filter*R/TErnie Intake*R/TErnie FULL 3" O2 housing with V-band*R/TErnie Modified DCsports 3" Down/Test/Flexpipe with V-Band*Greddy Ti-C Exhaust*255lph*Tein S-Techs*18" Volk LE-28s*Progress 25mm Rear Sway*Project Mu pads*JDM Tails*Cusco Heat Shield*Mishimoto Radiator hoses/Cap*ARC shift knob*Injector Dynamics 1000cc...
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Tags
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2004, 2005, 2007, acamus, ecu, evo, fuel, greddy, lancer, mitsubishi, patch, patches, reset, resetting, switch, system  |
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