My car also gets really bad gas mileage. I'm getting like 200 miles to the gallon with stop and go driving in the suburbs.(Sometimes i am a leadfoot, but i still shouldn't be getting that bad of gas mileage) I also have the problem with the gas gage jumping all around. When it'* at 1/4 left, its empty. and i see the thing jump all over. As soon as i go under half way, i fill up. Just to be safe. I will be replacing my 02 sensor soon 'cause that seems to be the best solution.

DAYUM, 200 miles per gallon? Sounds pretty good to me. Wish I could get that much. Hehe.

I normally get around 250-275 in town and around 400-450 on the highway.

Opps, didn't catch that typo. wouldnt that be great if you could get that kind of gas mileage.

You can , it'* called a moped !

Just finished a 1300 mile round trip to N CA and back. Got 25 mpg pushing hard (75-80) over the Siskiyou summit on the way down. Didn't push so hard coming back along the Coast route, and got 27. Stuck to 70 mph. Not bad for an SSEi.

Damn Will I wish I had your mileage. I'm still trying to fix my problem. Is there a service manual for just Bonnevilles?? I went to a couple places and there is only a Haynes book for GM models 1985-2000, and it'* not too specific for my 94 bonne. I looked in that book for the pcv valve but couldn't find it. Will, do you know where it should be on mine since it'* not an */c? Thanks to everyone who replied.

try going on ebay. some guy is selling a buge repair manual on cd rom for 94 bonnevilles

I think the CD manual you're talking about is a generic scam. Basic all-model stuff. Be careful with that one. Chilton'* makes the best aftermarket manual, but it'* never bad to have both it and the haynes, or even clymer.

Not sure about the PCV location. I know where mine is, so I'd be looking for a small cover bolted on to the plastic intake or even the lower aluminum intake. I can check my book later tonight.

try here for the actual two volume book set.

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1873485049

Jay

Yeah, my Bonnevile'* gas gauge gets a little funky below about 3/8ths of a tank, but it'* way better than the gauge on my last car (1995 Formula Firebird).
In the first couple of months of ownership, I ran the bird out of gas 4 or 5 times! When the gauge indicated 1/4 tank or less, the thirsty Formula could run dry any moment...

I don't know about the Bonneville gas tanks, but the late model Firebird tanks have a shape similar to the letter "V". When the fuel level is halfway between top and bottom, the gauge reads "1/2", but the tank is actually WAY below 1/2 full.
My Bonneville is a little bit similar, as it takes fewer miles to go from an indicated 1/2 tank to empty than to go from full to 1/2. At least the Bonneville'* gauge has the decency to go all the way to "E" before turning the driver into a pedestrian!

All the brilliant engineering that went into my 155+ MPH, 13 second, dead reliable, daily-driven Formula was impressive. As is the engineering brilliance behind the powerful, fuel efficient, and great-driving SSEi I now drive every day.....
So, WHY CAN'T THOSE BRIGHT GUYS AT GM MAKE A DECENT GAS GAUGE?????

As for mileage. My current L67 is closer to a Toyota in gas consumption than to my old LT1 powered beast.
300++ miles to a tank now. Gotta love it. I used to feel lucky hitting 200 miles with a 15 gallon tank.
I'm saving a pile on gas, and love the 3800 for it'* economy.