Locked Up Clutch Fan How Mpg Decreases?

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#16

12-22-2008, 07:02 PM

RÖENTGEEP

FOREIGN GURU

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Join Date: Jul 2006

Location: Celaya, Gto. MX

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Quote:

Originally Posted by 884x4broncoII

well im going off what it says in your sig with is basicly the same truck as mine but yours has 3.55's and an auto trans and mine is 4wd the 3.55's are a plus for millage the autotrans is an - and the 2wd is a positive. if your fan cluch is locked up that is defently a good place to start, maby try filling your filter bowl with powerservice to clean the injectors, make sure your airfilter is clean. check your fuel preasue and maby do the bb mod

The airfilter is clean, the fuel pressure is 70-75 psi after the bb mod (shimmed FPR). I used the additive so the injectors must be clean. The EBPV is not stuck, the EBP tube and sensor are clean with no soot clogs. Maybe the fan clutch must be the culprit because seems to be always engaged, and when you turn off the engine, the fan doesnt make any free wheel at all, but you can move the fan by hand with no to much resistence. I was thinking in the MAP sensor, too.