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99' Z28 miss and backfire on acceleration What Could I DO?

Old 12-22-2012, 10:03 PM
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i have a 1999 Z28 LS1 it misses a little bit at idle but it misses really bad when you accelerate. I have changed pluges, Wires, cleaned MAF, new injectors, 2 new o2 sensors, new fuel pump. Still misses
MODS:Slp air lid, K&N, Headers, no cats
TROUBLE CODE: P0174

If you have any ideas please let me know Thanks

It runs good while it is cold before it gets up to temp
TROUBLE CODE: P0174- System too lean (Bank 2)

What else can I do?? I have changed maf. O2 sensors. Injectors. Plugs. Wires. It currently backfires and misses.
Old 12-31-2012, 02:12 PM
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Fuel filter?
Old 01-20-2013, 05:50 PM
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p1637 is an alternator issue and the other code is a lean condition. Is your alternator charging ? Battery ok ?


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