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on going idle issue

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Old 02-25-2012, 05:35 PM
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Been having idle issues.. surging a few hundred rpms looked for vac leaks so i decided to do a datalog. First it threw codes p0171, p0174

Attached is the zipped datalog.

Please help
Attached Files
File Type: zip
data log for 98 z28.zip (16.4 KB, 17 views)
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Old 02-25-2012, 05:58 PM
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what are those codes for?
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Old 02-26-2012, 09:59 AM
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the codes are for bank 1 and bank 2 running lean.. the zipped file is the datalog
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Old 02-27-2012, 12:59 AM
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Might want to try the PCM and tuning section. I'm not familiar with up tuners and codes but I can help you diagnose if you post up your mods and what the cars doing
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