Ed, I can tell a very similar story. I have a '99 V-6 auto. My interstate
mpg was about 18.5 at 70-75 mph. I did get 20 one time going across the
state at about 60. I replaced the stock muffler with a Flomaster 3 chamber
and seemed to have lost all power. Dealer said he couldn't find anything
wrong. My second tank of gas was like 10 mpg! It then improved, this past
weekend I took a trip up I-75 at about 75mph and got 20 mpg!
I can't explain it, although I do know I had a heavier foot that first
tankfull! And, I have had a m.o. for a QD TB since late March. I was just
waiting for something like this past weekend to demonstrate that it was
ready!
Cal
----- Original Message -----
From: Ed Buxton <flamin_red_dakota@yahoo.com>
To: <dakota-truck@buffnet.net>
Sent: Monday, May 01, 2000 11:48 AM
Subject: DML: MPG
>
> I was averaging close to 19 MPG (199 Dak CC with V6
> and auto) while never driving more than 60 on the
> freeway. That was up from an average of 16.7 when
> driving up to 70. A few weeks ago, I had a FlowMaster
> 70 single in/dual out welded into with dual 2.25 pipes
> out to the back of the truck. Now my mileage has
> dropped to 15.9 (average from 3 fill ups).
>
> While I didn't except an increase in MPG, I NEVER
> expected a drop, much less such a substantial one.
> Is this normal? Could the 02 sensor have gotten
> screwed up? I want to solve this issue before moving
> on to a Qucik tb.
>
> Thanks
>
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This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:51:11 EDT