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Discussion Starter · #1 ·
Why am I getting such crappy mileage. I am running a mostly stock set up. When I got the car is was stock with 97K miles and I got 22 mpg on my first trip Impala Wheels were the only thing I had modified.

1994 RMW,
PCMFORLESS tune,
Home Depot CAI,
F-Body MAF,
3.08:1 rear gears,
dynomax mufflers,
1.5 roller rockers,
hollowed out cats,
New (10 mo old) GM O2 sensors,
Redone Opti with MSD Cap & Rotor,
New (20k) plugs.
Still original wires, but it is running like a champ.

Tranny has a little hick-up in it when I it shifts from 3rd to 4th (OD). Seems to still go into lock up.
 

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"Still original wires, but it is running like a champ. "

For a start, you should not be running 15 year old wires..
 

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Discussion Starter · #4 ·
How heavy is your foot? I've gotten as poorly as 13mpg in my RMW with 2.93's, but with a light foot average 18ish.
Probably to heavy, but much of that was 75 MPH highway miles.

"Still original wires, but it is running like a champ. "

For a start, you should not be running 15 year old wires..
Welllllllll........... no......... Just lazy I guess. I have a set of headers to go on. I will do the wires when I do the headers.
 
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