Bad mpg

[toddomen]

The Intake Manifold Plenum and gasket was replace the Intake Manifold Gasket was not replaced

[GTP Version 2.0]

Why were they replaced?

[toddomen]

I blew it I when I spray starting fluid to get it started when the fuel pump was out of it I spray two much it backfired one spray good one big spray BAD

[toddomen]

I need help 12-14 mpg

[tblake]

Todd, do you have access to a scanner that can watch live data streams? I would take a look at the long term fuel trim numbers, what are they?

Also, if you havn't yet, you may want to check fuel pressure to make sure it is within spec, and not bleeding off too quickly as if a fuel injector or fuel pressure regulator were leaking.

[toddomen]

No way to watch live data all fuel pressure are good could my trouble that i driver to work 2-3 miles to work

[jakegday]

yes, turning your engine on and off every 2-3 miles will certainly affect your mileage in a negative way.

[cadman20]

My daughters 97 GTP was getting 17 to 19 mpg on the highway, did all the tune ups, (plugs, plug wires, air filter and cleaned the MAF sensor) still didnt help.

I bought a reprogrammed PCM (stock for GTP with all current pontiac updates) on ebay, day after I put it in, took the car for a 200 mile road trip and was getting 28 to 29 mpg by the time I got home.

Made me happy. (I buy her gas)

[toddomen]

Is there something i can do for my car because of my 2-3 mile drive to work beside walking to help with mpg thank you

[Shpuker]

Originally Posted by toddomen

Is there something i can do for my car because of my 2-3 mile drive to work beside walking to help with mpg thank you

bike

[tblake]

Todd, are you basing your bad MPG off the DIC alone? Or are you calcing it out the old way at the pump?

You would be suprized how in-accurate the DIC really is.

[toddomen]

I do it at the pump the old way. I do have a bike i ride to work

No drop in miles. It ben like sent i got the car 8 mouth a go. it runs grate and ldi good and fast beside that some times it crank 5-6 times before it starts. Iam happy with the car and if that the best mpg i can get ok will be happy how about some good mods thank you all for your in put

[toddomen]

Went on a good road trip today 120 miles round trip on the highway use less then a quarter tank of gas is that go?

[tblake]

120 miles per 1/4 of a tank sounds pretty darn good to me.