Excessive Fuel Consumption....

Ghost

Member Number 257

NAXJA Member

Location

Hartsville, South Carolina

• Mar 19, 2005

• #1

Ok a friend called and wanted to know what would cause his 88 to gulp gass. We jsut finished a tranny swap from the pukegoat to the AW-4. I was thinking O2 sensor, or fuel rail O rings, or the fuel pressure regulator. Anythougths?

 

Ghost

Member Number 257

NAXJA Member

Location

Hartsville, South Carolina

• Mar 20, 2005

• #2

Btt.....

 

X

xjoe

NAXJA Forum User

Location

port orchard,wa

• Mar 20, 2005

• #3

how much is excessive ? automatics use a little more fuel than standards.

 

woody

NAXJA Forum User

NAXJA Memorial Lifetime Member

Location

NC Sandhills

• Mar 20, 2005

• #4

When I snapped the plastic hose that runs from the pass-side of the throttle body up to the MAP sensor on the center of the firewall, I was rewarded with a 50% reduction in MPG (from 20 to 10) and a very poor running 88 4.0l..

Is it possible y'all unhooked or damaged this pipe while messing with/plugging in the CPS on the new tranny?

 

M

MachineMan

NAXJA Forum User

Location

San Jose, CA

• Mar 20, 2005

• #5

I have a '90 with Auto tranny and 35's. I was getting 12mpg, then changed to K&N intake which brought me up to 13mpg... I think the rig should get at least 15 with mixed driving so Im still in search of a better solution.

Check the O2 sensor, I've read a few threads on the forum where a bad sensor has killed mileage. Im going to replace mine soon and see if it helps..

 

theslacker

NAXJA Forum User

Location

Wet Coast of BC

• Mar 20, 2005

• #6

I just did an O2 sensor on my 92 and the idle smoothed out, I lost the hesitation, the stumble when I punch it and there is alot less exhaust coming out the back. I only did it on Thurs so I don't have a new mpg figure but I hope it better than the 10 mpg was getting earlier

 

H

HossHoffer

NAXJA Forum User

Location

Aurora, CO

• Mar 21, 2005

• #7

Ghost, just fishing here but what about the tranny computer. Is there a difference in the two computers (pukegoat & AW-4) that could be causing a problem.

 

Ghost

Member Number 257

NAXJA Member

Location

Hartsville, South Carolina

• Apr 1, 2005

• #8

HossHoffer said:

Ghost, just fishing here but what about the tranny computer. Is there a difference in the two computers (pukegoat & AW-4) that could be causing a problem.

Click to expand...

We swapped to the Auto engine and tranny coputer. He was running it open but now has a cat that seems to have help.

 

G

gw204

NAXJA Forum User

Location

St. Leonard, MD

• Apr 1, 2005

• #9

What fluid did you fill the AW4. Dexron III non-synthetic, right?!?!?!

 

F

frsno jeeper

NAXJA Forum User

• Apr 1, 2005

• #10

Just put some acetone in there.