If the emissions are ok, (you haven't killed the cat), and the performance
is ok, I'd say you've got a fuel leak somewhere. Start it up and let it
run for twenty minutes or so on a surface where you can see drips. While
you're doing that, trace the fuel lines with an explosion-proof flashlight
(only use a match if you're a CP guy). Also check the evaporative
control cannister. After you find nothing, replace
the gas cap with a new one. ;)
KeS
On Thu, 17 May 2001, Patrick Washburn wrote:
> Hoping the elite group of towing team.net members can help with a mystery.
>
> Subject: 1998 Chev 3500 Dually w/ 454 engine..
>
> Problem: Absolute sucky fuel use. I don't mean "well you gotta big
> engine, of course it's going to suck" kind of mileage. I mean like 3 to 4
> miles per gallon. Empty. Not towing.
>
> Tried: Dealer and independent repair shop evaluation. (One shop even had
> a brand new, supposedly very high tech Snap-On digital engine anylizer. No
> information from them other than "Well, the compression is good.") Result
> is that all OBDII readings are within spec. Engine has around 49,000
> highway miles. We put on a new fuel regulator, no help. (Thought there was
> a TSB.)
>
> It runs great. No one can seem to figure out why this is. Can anyone
> relate any common experiences?? Any suggested areas to look at? Thanks
> gang!
>
> Patrick Washburn
> C-Tech Trailer Cabinets
> Designed for the Racer
> Wausau, WI
> www.racecabinet.com
> 715-355-8842
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