98 xlt 2.5L Running too lean - Ranger-Forums - The Ultimate Ford Ranger Resource

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Old 05-09-2010
Thread Starter
Join Date: Jul 2009
Location: AZ
Posts: 7
98 xlt 2.5L Running too lean

I have a 98 xlt with the 2.5L with 135K. About 6 months ago I got a check light that went on and the code was port 1 running too lean. I also think that it has read both port 1 and 2 runnig too lean. This has now happened 3 or 4 times.

So far I have:
cleaned the mass air sensor 3 times.
checked the spark plugs
run 2 bottles of luckas fule system cleaner
and repalced the O2 sensor

From what I have read different places it sounds like this is a hard issues to solve. But any thing would help!!
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Old 05-13-2010
93mk8's Avatar
Join Date: Sep 2009
Location: ap mi
Posts: 105
Make sure you have adeqaute fuel pressure. Should be 35-40 key on engine off and 30-35 engine running. It may be a weak fuel pump, injector issue, or your fuel pressure regulator.
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Old 05-14-2010
Marchy's Avatar
Join Date: Dec 2009
Location: Redmond, WA
Posts: 287
when was the last time you changed your fuel filter? if you aren't getting enough fuel it could cause you to run a bit lean.
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