Belt size change

[BNaylor]

Originally Posted by gprixgtp

Don't feel to bad my 97 gtp gets worse fuel mileage that my 70 mustang with a 429. The gtp gets just over 8 mpg. I haven't done anything to it but exaust, cai. I changed plugs, fuel filter, o2 sensors, cleaned t.body, maf. There is no smoke and the car runs like a champ. I quit worrying about and just deal with it. I don't drive it to far so I don't yet know what it gets on the highway. All the driving I do ith it has been in the city. One of these days I will get a bug in my pants and really try to figure it out, but for now it doesn't bother me.

Ouch! 8 mpg? Thats worse than a SUV. I can see your classic car getting that fuel mileage. With the cost of fuel today probably worth trying to figure it out when you the opportunity. It would drive me nuts.

[gprixgtp]

Luckily or unluckily depending on how you look at it I have not had much time for anything but work, so I only have to drive about 3 miles to work and 3 back so that is why I said it hadn't bothered me much yet. The first chance I get with some free time I am gonna spend it figuring it out. It has to be the maf or iac or one of those other fabulous sensors or controllers.

[grandprix dude749]

Wow thats crazy your gas mileage is just not making sense.With a 3.8 even with city driving you should be doing much better.Are you sure those number are accurate because if so you definately have an issue on your hands.Id even go out on a limb here and say a problem that big would of caused a check engine light by now.

[wlkjr]

Originally Posted by gprixgtp

Luckily or unluckily depending on how you look at it I have not had much time for anything but work, so I only have to drive about 3 miles to work and 3 back so that is why I said it hadn't bothered me much yet. The first chance I get with some free time I am gonna spend it figuring it out. It has to be the maf or iac or one of those other fabulous sensors or controllers.

You still only spend $15 a week on gas and I'm spending $60 even though I get 25 mpg. Your car wouldn't even reach maximum operating temperature in 3 miles. Just think, if you had a Moped you would only spend about $1 a week in gas.

[gprixgtp]

Yes the light has been tripped. No unless I sit and let the car warm up first it will not reach operating temp.

[Carwhiz]

Motormite makes a/c compressor bypass pullies for gm 3.8's and 3.1's and the 5.7's. cheap...only $40.00 and bolts directly on in replacement of the compressor. I've used them and they are slick~!! I can weld and all myself, but for that price i dont even bother trying to make my own pully. just letting you all know.