I hadn't paid attention to my milage all winter ('79GT). I was used to every Wed. Morn before classes started to stop off at hte gas station and fill up, it took exactly 18$ to fill it up every time (Can you tell the only driving I do is to school and home?) Well I was about to go on a trip to Vancouver BC (Down from Kamloops) So I thought I would see what kind of milage I got before I left. Well through city driving (School and back) I got 212Km to ONE tank of gas! 39Liters!!!! In the summer I was getting close to 550Km almost 600 in city driving!

So I started asking myself what it could be. And thought, well its been running cold lately. I pulled the thermostate and swapped it for a warmer one. Bang on, Milage went sky rocketing!I got 550Km on the next tank of gas! Jordan was a happy boy!

Milage stayed way up on his trip to Vancouver he was happy, he could afford the toll highway and get there quicker.

On the way back I got stink for milage! Usually I use under 1/2 a tank of gas on the way back, speeding too (130Km/h). I went 110Km/h (speedlimit) on the way back. I used a full tank of gas!

Back to what it might be. Got to town and heard whistling when I stepped on teh gas. Oh a vaccum line must be off. Well I get home and no lines are off, the whistle isn't there at idle, but when I rev the engine up it does whistle. I got my Girlfreind to keep the revs up while I stuck my head in the engine to listen for the wistle. (don't worrie I didn't put it in the fan or belts)

I Think my injector seals are leaking as thats where the sound is coming from, its pretty cold so I don't want to be out there spraying stuff on my engine.

Will the seals make a huge impact on milage? When I change them should I change the all the vaccum lines I can? They are cheap, just a time consuming job.

What else might some of you intellegent minds come up with as possible causes?

I'd like to improve my milage so I only fill up the tank every two weeks instead of every week! thanks!

(How many other people are paying 46c per liter out there?)

Jordan

Oh '79GT, B21F, no O2 sensor system (what is that called?) M46, well maintained.

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