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Better Gas Mileage?

Adidasdude1989

Adidasdude1989

New member
Ok so anyone have any tips? Im not a heavy footer but i feel like im consuming a lot of gas then i should be. No gas leak at all by the way.

I know a dirty fuel filter can affect fuel economy a little bit right? When should i change that? Fuel injection cleaner? Anything about that?

Thanks a lot to those for helping me as i post CONSTANTLY asking the random silly questions. :th_biggrin2::th_biggrin2::th_biggrin2:
 




For your 98 I'd suggest removing the Throttle Body from the Upper Intake Manifold then remove the Mass Air Flow Meter. You'll have to go get the special torx bit(s) with the hole in the middle at the parts store and pick up a throttle body gasket. Remove the Mass Air Flow from the Throttle Body and clean them separate. Use Mass Air Flow cleaner on the MAF and Throttle Body cleaner on the Throttle Body. It's easier to get to everything good and you'll find a lot of carbon build up on the inside of the TB. Put everything back together carefully and taadaa.

What's the average mileage one can go on a full tank of gas?
 
Lets see....

Clean MAF and TB
New Plugs/wires
New O2 sensor
Seafoam in the gas tank and oil (about 50mi. before an oil change)
Properly inflate tires
Change air filter
Remove any unecessary weight from vehicle
Drive lightly (no WOT from a stop)
Check for and repair any vacuum leaks

In my 00 GPGT with a mix of city and highway (running the A/C) I can get about 410-420 on a full tank, which means from Full to completely empty. If not all the way empty since I like my fuel pump I get about 400mi. to a full tank, and that includes some WOT runs on the highway passing people.
 
dbextreme said:
For your 98 I'd suggest removing the Throttle Body from the Upper Intake Manifold then remove the Mass Air Flow Meter. You'll have to go get the special torx bit(s) with the hole in the middle at the parts store and pick up a throttle body gasket. Remove the Mass Air Flow from the Throttle Body and clean them separate. Use Mass Air Flow cleaner on the MAF and Throttle Body cleaner on the Throttle Body. It's easier to get to everything good and you'll find a lot of carbon build up on the inside of the TB. Put everything back together carefully and taadaa.

What's the average mileage one can go on a full tank of gas?
Click to expand...

Also should be noted to NOT touch the MAF wires inside with anything, just spray it down thoroughly with some pressure and let it air dry. Touching will result in you going back to the store to buy a new sensor.
 
About 310, ive ran up to 317 before but as im thinking about it, as gas prices are crazy right now, usually put 6 gallons in but wow its gone within 150 miles it seems, i just think that needle is goin down quite fast...
 
Adidasdude1989 said:
About 310, ive ran up to 317 before but as im thinking about it, as gas prices are crazy right now, usually put 6 gallons in but wow its gone within 150 miles it seems, i just think that needle is goin down quite fast...
Click to expand...

My 04 GTP makes about 330-350 miles on a tank, and I live in the mountains... lots of interstate though too. My DIC says average is 21.2mpg. Im hoping it'll go up now that I fixed my MAF issue.
 


HOLY CRAP!!! Then I got a problem to!!! LMAO

My car runs fine, no problems, no SES light, and plenty of power. No matter how I drive I can only average 250 miles per tank......

I have new LIM gaskets, UIM, Removed the throttle body and cleaned it and the MAF, new fuel filter, new plugs and wires, new downpipe, Ubend and Res delete... I do have a heavy foot, but nothing like WOT all the time... I was getting the same mileage before my engine fire to...

Now I'm concerned.... LOL
 
how big is your tank? mine is around 13 gallons and i get around 275 miles which is around 21 mpg. I drive city/highway combination.
 
Every fill up (I always go from full to amost empty) is anywhere from 14.7 - 15.2 gallons on fill up... That's ~ 16.5 MPG
 


99PontiacGTP said:
how big is your tank? mine is around 13 gallons and i get around 275 miles which is around 21 mpg. I drive city/highway combination.
Click to expand...

thats better than mine...i go from empty to full and its only 11 gal max...and i only get about 180 miles...roughly 17 mpg max...so that blows. i did plugs, o2 sensor, oil change recently...not sure what the heck is the deal...and not sure why i can only put 11 gal in from full empty, that or my tank sensor is WAY off
 
according to my DIC i also only get 17 average mpg which really sucks. tb and maf cleaning is on the to-do list for sure
 
17-19 mpg city is all these things are rated for. Hit traffic, expect 14 mpg or less.

27-30 mpg requires freeway and careful driving, as in no accelerating to pass people and other nonsense like traffic.
 
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