>
>
> ------------------------------
>
> Date: Tue, 04 Jul 2000 16:51:32 -0700
> From: Chris Ryan <CSRyan@teleport.com>
> Subject: DML: Very poor MPG
>
> Hey everyone, my name's Chris, long time reader, first time poster. I
> own a beautiful Black '99 CC Sport+ 4x4 318 Auto. I've added a GoRhino
> Grill/Brush Gaurd, Westin Side-Step Bars, WAAG Tail-Light Gaurds, GTS
> Blackouts F & R, 180 TS, K&N Drop-in, Modified the intake to the stock
> box, Champion Truck Plugs, Flowmaster 2 chamber, Extang BlackMax
> Tonneau, Rancho 3" lift, 32x11.5 BFG AT, running premium most of the
> time, with currently around 18,000 miles.
>
> I love everything about the truck, except the one and only problem I've
> had with it since I brought it home. It gets 9 city/14 hwy. Up until
> around 10000 miles it got 14 city/19 hwy. The only mod that I did around
> that time was add the Flowmaster, and I wouldn't have thought that
> would've brought the milage down that much, if at all. I've had it to
> all three of my local "5 star" service centers a total of seven times
> and I got at least as many different answers, none of which helped or
> was even acurate in my opinion. The explainations ranged from that it
> was normal milage, to something about the sensors needing a certain
> amount of back pressure and the addition of the Flowmaster changed that,
> to the inch larger tires. It's obviously not normal, the inch larger
> tires should produce the same if not better mpg, I'm not sure about the
> Flowmaster though. For economic reasons I didn't change the diameter of
> any of the pipes, I just swapped out the stock muffler for the
> Flowmaster. Would that have anything to do with it? I guess my next step
> would be to start hunting for a leak, she sleeps in a garage and I've
> never noticed a fuel odor, so I doubt that's it either. I also thought
> I'd put a presure gauge on the test port on the fuel rail and make sure
> I'm getting proper pressure from the tank to the injectors. If I get no
> results from that I might try putting an OEM muffler back on, but I
> don't want to do that. She runs like a champ though, that's really the
> most confusing thing, I'm constantly dusting stock trucks and cars of
> all makes and models, and I can leave a nice trail of rubber behind when
> I heat the tires up. So it doesn't seem like she's starved for fuel or
> leaking any, but she sure gobbles it up.
>
> Any suggestions or comments would be greatly appreciated.
>
> Chris
> Portland, OR
>
> ------------------------------
Sounds like a nice truck. My 2 cents worth would be that gas mileage can be affected greatly by driving habits. If you have
a "lead foot" then you aren't going to get as good of gas mileage. There is a trade off. Thrills or gas mileage. I know
that I have consciously changed my habits. At these prices I can wait for the thrill. And it helps. I used to get about 13
mpg in town. I have been getting 17 to 18 mpg in town since and around 22 on the highway at 60 to 65 mph.
Spook
1998 Intense Blue 4x4 Sport
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