My ATX is getting like the worst mileage of all time and I have no idea what the problem is. Yes, normally I drive like an *** BUT, I've seriously, SERIOUSLY tried to baby it and no matter what, I just can't get any good mileage out of the thing. On the highway averaging about 75mph, I get maybe 20.5mpg AT BEST. This past fill up was 14mpg. My 454 Carburated Nova gets that kind of mileage. And I DO drive that like an ***. What is the problem?? It throws NO codes of any sort, it has a new Coolant temp sensor, new ACT sensor, newer Ypipe (20k miles on it), new 02's, I have no idea what the problem is. Any ideas??
HORRIBLE gas mileage
- Thread starter SHODOGG
- Start date
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AutoSHO
No SHO = Mo $$$
How long does it take to warm up?
Also, jack it up and make sure none of the brakes are dragging.
Also, jack it up and make sure none of the brakes are dragging.
V6&V8SHO
SHO Member
Luke, take the lpm out. Drive the car for about 2 fillups and let me know how your gas milage is.
I had bad gas milage till I yanked mine out and all of a sudden my gas milage increase considerable, I noticed more tq, and better all around performance.
I had bad gas milage till I yanked mine out and all of a sudden my gas milage increase considerable, I noticed more tq, and better all around performance.
SHO_Driver
New Member
How many miles are you getting per tank?
Blast7
Member
I wonder if the MAF is not working properly.
HighSpeed
Low Drag
How's the spark plugs? How's the tune up history? Remember, its been cold out also, you'll get worse mileage in the winter time.
xpnsiv93
New Member
Well...i dont wanna be a THREAD HI-JACKER, but im having the SAME ISSUE!!! 
if i get 200 miles out of my months FULL TANK IM Lucky, and i use nothing but premium!! O'well, back to the garage!!!
-nick-
if i get 200 miles out of my months FULL TANK IM Lucky, and i use nothing but premium!! O'well, back to the garage!!!-nick-
Plugs and wires have maybe 10k on them, Not sure if the CPS has been done ever or valve adjustment. It runs great, though, other than the crappy gas mileage. It DEFINITELY picks up a huge amount of power with the 80 MAF in, though, its very noticable.
Huntervf
Bored now
You got nothing on me my man...I pulled approximately 10-11 mpg on my last tank up with the 91. Like you, I'm getting no codes at all, but I DID have 3 cylinders fail the balance test so I'm suspecting leaking fuel injectors. Either that or my exhaust is a little plugged up. You could be looking at the same problem.
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