12 MPG or less!

[twstice]

I have a '95 GTP with the 3.4 DOHC. I'm getting around ~12 miles per gallon. All i do is drive to school and back every day Mon-Fri. Most of the way to school is highway, where im doin around 65 with o/d kicked in runnin about ~2,000 rpm. I dont get on it at all. .....I'll name some of the problems it has, maybe that will help pin poin what the problem is b/c im on an extremely tight budget. It has a rough idle, and when you first take off from a dead stop it's sluggish untill it gets to about 2,000 rpm and up. When i first start it up in the mornin and after school, or whenever it has sat for a long time, it blows a puff of bluish smoke out of the exhaust, but then after that it doesnt smoke anymore at all. The ABS and !Brake and SRS airbag lights are on at all times. other than that, it has all the factors that should get good mileage....i dont get on it, it has brand new tires and they all have the same amount of correct pressure, it has been aligned not very long ago too... Any suggestions at all would be greatly appreciated, Thanks ahead of time!

[AtlantaGTP]

I had similar problems. So I did the injector cleaning service through QLube and that did nothing. Actually even worse, I failed emissions after doing it.

[BIG-L]

I have a '95 GTP with the 3.4 DOHC. I'm getting around ~12 miles per gallon.
When i first start it up in the mornin and after school, or whenever it has sat for a long time, it blows a puff of bluish smoke out of the exhaust, but then after that it doesnt smoke anymore at all.

Have you ever changed the plugs,fuel filter,pvc and spark plug wires and the smoke that happens at start up sounds like bad valve seals.How many miles on your car????

~Larry~

[AtlantaGTP]

I have 70K now but had about 60K when I did the fuel injector service. I'm not a mechanic or even good under the hood, so I haven't done what you hve said. I like your car, BTW. That's exactly what I have - a red 4 dr. GTP but with the less attractive alloy wheels.

[Phoenix69]

I drive a 97 Grand Prix GT and get 19.7 MPG, does that sound right? is there any way to improve it?

[BIG-L]

I drive a 97 Grand Prix GT and get 19.7 MPG,

That sounds about average...I get about 19.8 now and its time to change plugs since I run 2 colder.With new plugs I get around 21/22 in town..same question...how long since the plugs,pcv and fuel filter have been changed???

~Larry~

[twstice]

i have 115,000 miles on it, and i have changed the spark plugs and wires not very long ago

[twstice]

i havent replaced pcv or fuel filter though

[BIG-L]

Sounds like that should be the next thing on your list and cant cost over 20 bucks for both of the parts....~Larry~

[Phoenix69]

My car has 48k miles on it, they havent been replaced yet.

[BIG-L]

My car has 48k miles on it, they havent been replaced yet.

Sorry,what year is it??

Id at least replace the fuel filter and think about some ACDelco 41-101 spark plugs gapped at .058...the pcv can also just be sprayed out with some carb cleaner...but they dont cost much at all.

~Larry~

[twstice]

Alright, i'll see if i can get pcv and fuel filter, i'll let ya know what happens. Around what should my car get though? Just so i have an idea. Do these 2 things make a huge difference in gas mileage?

[BIG-L]

It should be,at the least 19mpg.

The fuel filter should be replaced once a year...I have seen alot of fuel filter's get cloged from crappy gas and one thing I never do is pull in the station and get gas when the truck is filling the tanks.I change mine every other oil change.For me thats every 6 months.

~Larry~

[twstice]

ok, i'll get the fuel filter and pcv asap, ...one more question, is the fuel filter hard to change?

[BIG-L]

Your fuel filter is the same as the 97/03 and should be located under the drivers side frame rail and some of these instructions may help you out.....~Larry~

Click here for instructions