Pull the codes, check your sensors. After all the work you've done and still
no improvement I'd suspect a bad sensor.
Mike Styer wrote:
> Crap...After changing the timing belt, giving it a tune-up, new tires,
> and new exhaust, my V6 is still only getting 10-11 MPG. Does ANYONE
> have any ideas of what I can check?
>
> Two weeks and 180 miles ago, I cleaned my Autolite 3932's (gapped at
> .45), checked the compression (wet and dry-all consistently between 145
> and 155 lbs), removed the TB, and thoroughly cleaned the intake and TB.
>
> I also changed the timing chain (I did put it on correctly :), changed
> the oil, coolant, and filters. Yesterday I intalled a new Dynomax
> exhaust system. The only other mod I have is an electric cooling fan
> that I had replaced the stock with...
>
> When I first had these problems in April, it was sudden (MPG went from
> 21 to 10 from one fillup to the next). Since then it consistently gets
> 10-11.5 mpg (city or highway). My truck was already running badly then,
> so I can't say if I had any performance problems when it happened. Now
> my truck runs like it did when I got it, but still gets half the mileage
> it should. I can't figure this out.
>
> PLEASE, if anyone has any ideas, send them my way. Running for
> president would be less frustrating that this...
>
> Mike S.
>
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-- '00 QC Sport Plus Intense Blue Pearlcoat 3.9L V6 - 5spd. - 4x2 Sport Plus / HD Service / Trailer Tow grps am/fm/cd w/ infinity soundDML profile: http://www.twistedbits.net/WWWProfile/dakota/UwHhKURBBnMA6
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