IS this Normal?
#1
IS this Normal?
I have a 1998 firebird formula, slp lip, longtube dual 3", rear O2 sensor off, egr, Bosch 044 in tank fuel pump with -8an fuel lines to the front, stock fuel rail (for now) planning on putting in supercharger. getting 7-9 mpg. Is this the norm or is it really shitty?
#2
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,038
Likes: 0
Received 1,487 Likes
on
1,070 Posts
That's very shitty.
I get at least 16+ MPG with 100% city driving even, with a stock A4 car.
Headers and a free flowing exhaust should raise your MPG if anything, if it's properly tuned and you drive it easy. Nothing you have listed should explain such poor MPG.
I get at least 16+ MPG with 100% city driving even, with a stock A4 car.
Headers and a free flowing exhaust should raise your MPG if anything, if it's properly tuned and you drive it easy. Nothing you have listed should explain such poor MPG.
#5
I get 13-15 city, there is no way you should be getting that kind of mileage. Check to make sure your O2's are working but even then it still sounds a little much. I would double check your calculations on your mpgs.
#7
On The Tree
iTrader: (5)
Join Date: Apr 2012
Location: Worcester, MA
Posts: 141
Likes: 0
Received 0 Likes
on
0 Posts
Sounds like a bad google search, "Is it normal to" lol. But yeah that is pretty bad for even my old 71 Blazer with a 400 small block. Should be getting almost 2x that in city and almost 3x that for highway mpg.
Has the car been custom tuned by anybody, and is it running fine? No rich conditions, etc?
Has the car been custom tuned by anybody, and is it running fine? No rich conditions, etc?