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#1
04-25-2004, 09:50 PM
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problems with everything
I tried to adjust my fuel trims today using my MAFT. I have one of the dataloggers that you can get off of E-bay. Everything looked good except my fuel trims were super-messed up. They were all reading 162. This is the first time I ever datalogged and i'm not certain of what my fuel trims should be but i know that is not right. Could it be reading in a different measurement that would make it right? I also noticed that I have what i believe to be spark blowout. Under hard acceleration the car starts to jerk a little bit. I know what fuel cut is because I have experienced that too and i know it is definitely not that. If it is spark blowout what can I do to stop it and what would be causing it? If there is somebody near western PA that knows how to tune cars really well please help me. like i said i have never done this before and if somebody would be willing to help me out on this I would be very greatful.
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#2
04-25-2004, 11:16 PM
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Re: problems with everything
Sorry I know you've mentioned it before but I forgot. What turbos/injectors/supporting mods are you running? what plugs do you have and what are they gapped to?
If it feels like the car goes, then slows, then goes then slows, almost like a back and forth series-type of thing then it is probably blowout.
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#3
04-25-2004, 11:26 PM
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i have 13g's with a stock fuel system right now. I'm using an LS6/MAFT to tune. I believe i have NGK platinum spark plugs gapped to .04in but i'm not 100% positive. That's exactly how my car accelerates once the gas pedal is past about half way
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#4
04-25-2004, 11:26 PM
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Re: problems with everything
hey pearl ill see if i can get my uncle to help u out he worked for toyota for 25yrs yea i know u own a mitsubishi but he helped me tune my eclipse.so ill see if he can help u
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Who says GTO's aint badass?mine is BIGGIE 
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#5
04-25-2004, 11:30 PM
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that would be awesome if he could help me out. i really wanna figure out what's goin on with my car so i can get it running good. I know it should be alot faster than it is right now.
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#6
04-25-2004, 11:32 PM
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Re: problems with everything
Get NGK copper plugs and gap them to .28-.32 that will prevent blowout that the platinum and iridiums cause. The copper plugs are colder and gapping them closer will help them keep a strong spark going. If you don't have the money, at least gap your plugs alot closer than .4 that is most likely causing it.
As far as the fuel trims, let me do a bit of research, because I don't have any experience datalogging.
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#7
04-25-2004, 11:33 PM
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Re: problems with everything
Are they reading 162%?
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#8
04-25-2004, 11:39 PM
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i'm not exactly sure. It doesn't have any labeling on what measurement they are using whether it's % or what.
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#9
04-25-2004, 11:43 PM
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Re: problems with everything
OK, well first off, did you reset your ECU? Assuming you did, are you sure you don't have any vacuum leaks.
Those 2 precautions aside... Here's a thread I just looked at: http://www.3si.org/forum/showthread....7&page=1&pp=10 I remember you saying your MAFT was zeroed out, except for idle was at 2, have you tried zeroing it out again, because if you're at 162% it sounds like you're running REALLY rich. Granted I don't think idle settings would affect your driving, but who knows, it may think you have different than stock injectors. I don't think you have an A/F controller right, so you only have the MAFT to tune? most use an AFC to fine tune. If you are a member at 3si, I would post your datalogging there as well, all your results, because they have tons of experts that don't mind helping out.
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#10
04-25-2004, 11:50 PM
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Re: problems with everything
I have indeed reset my ECU and the same things keep coming back up. I just replaced my turbos last weekend so i had disturbed all the vacuum lines removing the rear turbo. I will check to make sure that they are all connected properly but i was pretty careful in connecting everything. My IDC seems to only be around 3-5%. Does that mean anything that would point me to what is wrong? Should I check my return lines like it says in that post because I didn't replace them when I changed my turbos. If that doesn't work should I try to use Seafoam to see if i have a leaking injector.
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#11
04-26-2004, 12:07 AM
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Re: problems with everything
IDC is 3-5% on injectors? at idle? It should be way way way higher if you are talking injectors at WOT.
I would lean towards tuning first, before jumping to conclusions with leaking injectors. I'm still looking...
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#12
04-26-2004, 12:09 AM
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Re: problems with everything
Here's some more reading that I'm looking at now:
http://www.3si.org/forum/showthread.php?t=205846 http://www.3si.org/forum/showthread.php?t=205323 http://www.3si.org/forum/showthread.php?t=204323 http://www.3si.org/forum/showthread.php?t=209496
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#13
04-26-2004, 12:17 AM
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Re: problems with everything
the 3-5% idc was at idle not at WOT. at WOT it's at about 95%.
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#14
04-26-2004, 12:30 AM
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Re: problems with everything
So at WOT you injector IDC is ~95% and your fuel trim hits 162
What are you O2 trims looking like? Are you watching knock?
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#15
04-26-2004, 12:35 AM
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Re: problems with everything
Here's what I found:
fuel trims are what is going to help you make adjustments to the maft settings... 100% is optimal... >100% means your running lean so make it one click richer <100% means your running rich so click one more leaner.
__________________
96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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