sucky gas milage

[beattie]

i have a 97 gtp and on the dash it says i get 10.8 miles per gal anyone know what could be the cause of this or not i know the check engine light was on bout week ago but went off got it checked said egr valve can that be the cause of a big drop or something else if egr vavle is there away to fix it or just replace it....thanx

[dsmuts]

What's your actual calculated gas mileage? Is it on the metric setting?

[Fivefingerdeathpunch]

You left way too much info out.

We need to know what fuel you are using, what kind of driving you do. Any recent tune ups done to the car?

Also don't forget the cold weather will reduce gas mileage and never follow the DIC 100%, do the math by hand and reset the avg mpg everytime and see how close it is to the real mpg.

And yes a bad EGR will affect mpgs on the freeway when it is active.

[nos4blood70]

I never trust my DIC anymore. It can be off up to 2 MPG in either direction.

[beattie]

i do normal drivin sometimes get on it but not much just like the other gtp i had but they never said under 17 i run premiun plugs and wires are good car runs great i notice today when i went out started it let it warm up i went back out and it read 2.8 mpg on it then went up to 10 after driving

[Fivefingerdeathpunch]

Do real hand math and get back to us. As we said the DIC is not something to trust.

[dsmuts]

When it's sitting and idling it's getting 0 mpg.

[Madness]

Do you let it warm up or idle on cold mornings? It was -10F last week, mine ran 10 before and after work several days. I like a warm car so this drops my mile alot. Cold weather drops mileage.

[spazzz]

I just had to let it out.
My DIC is stupid in winter

[beattie]

right could just be cold weather ill have to check into how much im really gettin.....also dont kno if this is related at all but ok its snowing here and say i punch it to burn out weather icy or not when my rpms get to about 4 it stops for quick second then goes again and this will constantly happen till im not spinning anymore

[Fivefingerdeathpunch]

Traction control stopping you from breaking your car.

[beattie]

thats what i was wondering but the trac off light is on i have the 97 and the light and button is hiddin on them behind the plastic

[beattie]

just something else i notice when i fill my car up the dash says 149 in range im pretty sure my other gtps said like 2 something so u think fuel pump messed up computer maybe the unit on the dash would watever makin that messed up be makin my mpg be messed up to

[ericspecullaas]

May sound like a dumb question but is you dic set to km? I had an 1981 Eldorado V8 6 4 and the estimations were off. I was getting 70 mpg at a red light. If I was you I would do the math by hand it will be more accurate that way.

[beattie]

no lol it isnt set to km cuz i even switched it back and forth i wondering if something is just messed up cuz it says im gettin 8.9 mpg and the range only goes to 149 when i have a full tank and also when my gas gauge gets to bout half a tank the dic says low