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Old 01-28-2006, 07:01   #1 (permalink)
BBB18
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98 f250 rough idle running lean

runs strong but stalls at idle O2 readings normal but running too lean,
mass air new o2 new (1) no intake leaks help

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Old 01-28-2006, 08:01   #2 (permalink)
Backyard Mechanic
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Re: 98 f250 rough idle running lean

"BBB18" <rbaaron18@aol.com> wrote:

> runs strong but stalls at idle O2 readings normal but running too lean,


contradictory! What are the codes?

Pings?

Stalls at idle, rough running? Or stalls at idle just too low RPM, but
smooth?


> mass air new o2 new (1) no intake leaks help
>
>


Why did you buy a new MAF? Why new O2 sensor? How many miles? Change the
fuel filter (not likely the prob, but...)?

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Old 01-28-2006, 17:01   #3 (permalink)
BBB18
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Re: 98 f250 rough idle running lean

new fuel good pressure 35psi good vacuum 18 runs rough when about to stall
165000 codes are po171 po174 p1131 p1154 no ping no black smoke

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