PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

sputting under light load with lean spikes

Old Jun 22, 2010 | 08:34 PM
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Default sputting under light load with lean spikes

where do i start just got it running with the 60lbs.....also afr are everwhere while driving.only tuned it for about an hour but just wanna get some ideas on where i have to work on.
will try to get my tune and maybe a data log up soon

setup
lq4 stock with a rear mount t70 running a 2 bar hptuner map with 60lb injectors
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Old Jun 23, 2010 | 06:32 AM
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well did you setup your tune for the injectors? IFR, Min pw, default pw, and all that good stuff? That is a start. If your tune was in good shape before you should be relatively close just by changing those items.
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Old Jun 23, 2010 | 07:22 AM
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Start with the logs...
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Old Jun 23, 2010 | 08:28 AM
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well i know i changed the size for the injectors because it wouldnt start before i did that. i guess ill get a log and let you guys that know look at it and give me some starting points
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Old Jun 25, 2010 | 06:39 AM
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how do you upload the logs i tried it last night and it says that its an invalid file????
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Old Jun 25, 2010 | 09:38 PM
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I would say start with regular idle and drivability area fuel trims. Both sides reporting within +/-1% of each other-irregardless of the total error??? A high error on one side should lead you back to your most expensive sensor- your brain/fingertips/ears for exhaust leaks. No tune will fix this kind of descrepancy.
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Old Jun 30, 2010 | 09:34 AM
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if i where to have an exhaust or intake leak wouldnt it never run right? it will run fine then start sputting. everyonce and a while it will through a mass air perfomance code i dont know if that has anything to do with it?
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