Re: Loud Exhaust (Answer?)

From: David Rand Kirtland (drk16@cornell.edu)
Date: Wed Apr 07 1999 - 10:36:13 EDT


I used to have a 93 cc v-6 4x4 3.55 5spd with MPSBEC, and it's gas mileage
sucked 13 city 19 highway(heavy foot in town). All time low of 9 mpg when
I was at school, all short trips in the winter. During this time the
inside of the exhaust pipe would get really black and sooty, but would burn
off if i took a long trip. The exhaust wasn't exactly quite. but not loud
by any standards. Is the thermostat good?, injectors?, sensors? I had it
for 4 years and only changed fluids.

At 09:03 AM 4/7/99 -0400, you wrote:
>OK, here's the deal. Took my Dak to the local muffler shop (Monroe)
>yesterday and asked them to check for a leak. They put it up on the lift and
>blocked the tailpipe, result: They heard nothing. No leak What so ever. The
>mechanic told me what the problem might be is that unburned fuel was
>igniting in the pipes (y-pipe area and collector) and that would cause the
>loud, resonating sound I am hearing. A few things that lead me to believe
>this might be the fact is that when I bought the truck about a month ago,
>the dealer told me he put a new muffler on it which I verified by a visual
>inspection. Yet, when I took it in for the required new registration
>inspection, I was told that the baffles in the muffler were blown out and
>they asked me if I had a warranty on it. Also, my fuel mileage is pretty
>poor (about 12 mpg for a V6) and the inside of my tailpipe is really black
>(like unburned fuel black). My question is has anyone else heard of or
>experienced this problem?
>P.S. Any other New England DML'ers out there?
>
>Thanks in advance to all my fellow DML'ers!
>
>Mitch
>93 Dak CC 4x4 V6
>
>
          David Rand Kirtland
          drk16@cornell.edu



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