Does this sound rights. i am only getting 10mpg with normal driving.. It seems like it is running really rich though. Could bad o2 sensors cause this?

 

im sorry.. I though i click the lt1 tech link.. my bad.

 

it would all depend on what rpm and how often your hammering on the car not the tranny or the stall. if your at high rpm's or hammering then yes 10 mpg could be about right if you driving around at 30 mph and 2300 rpm then no something else is wrong.

 

one full tank of gas got me right over 150miles. I think i went wot once or twice. and most of the time driving was between 2500/3500 rpm and cruise in 3rd.

 

that's high rpm remember the ls1 likes to cruise and get best mileage around 1700 rpm plus get the rich situ figured out that will help lot

 

With no O/D in the TH350, you aren't going to see much in the way of fuel economy. But that still sounds a little on the low side. If you think its running rich, get it checked with a wide band sensor, or at least do a scan log and look at the WOT O2's and the long term fuel corrections. That would give you some insight into a potential "false lean" condition that might be driving your lonj term corrections too high, and wasting fuel. Leaks in the exhaust before the O2 sensors, or misfiring can cause this condition.

 

I probably get around 10mpg in the city, but I just completed the Hot Rod Power Tour and logged around 3000 miles averaging 20mpg. (TH400 and a loose vigilante converter).

laterz

 

Sounds about normal. With CC306, Vig 3200 converter (flashes more like 4000), 3.73 gears and a 28" tall tire, I get 12-14 city, a little more on the highway, but I still have a 4L60E.

 

in my 4200Lb 76 Skylark with a 300HP 350, TH-350 trans with a 2800 stall and 3.73's I was getting 12 or so city driving...that was with a 650CFM Carb with a messed up choke. I would say your probably a bit low, and you might want to get a scanner on it and see what its doing.

BTW if your looking for gas mileage you really picked the wrong tranny combo Try going back to an overdrive or putting a 6 speed in it.

 

Im not looking for gas milage or i wouldn't have bought a camaro. I would have like to get between 12-15 though. Most of my driving for those 150 miles was to the track and back which is basicaly like expressway driving.