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Old 01-28-2012
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I am: Steve C
Join Date: May 2011
Location: Pa
Vehicle: 1997 Ford Ranger
Posts: 10
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Lean and Rich at the same time?

I have a '97 Ranger 4.0L. Recently my check engine light went off. Both sides of the engine are running lean and rich. So four codes total. Not sure how this is happening because they are contradictory codes. I have a cold air intake and custom exhaust. Besides that i have replaced the wire hareness, replaced both MAF and EGR, cleaned out injectors, ran compression and smoke tests, and all that fun stuff. Any ideas on what could be pushing these codes?
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Old 01-28-2012
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I am: Kris Rogers
Join Date: Jun 2011
Location: glastonbury, ct
Vehicle: 2003 CHRYSLER FX4 LVL 2
Drive Type: 4X4
Posts: 1,236
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o2 sensors?
my guess would be on faulty sensors/wiring
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Old 01-28-2012
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Jp7 Jp7 is offline
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I am: Faster than you ...
Join Date: Sep 2007
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check your scaling tables - that will give you clues.

wasted money on a cai, because your truck came with that from ford.
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