BAD gas mileage.

I'm getting horrible gas mileage on the Monte since it went back together. There are no apparent gas leaks. The dwell is right on 30 degrees. My uncle suggested advancing the timing. It was at 8 degrees per the emissions sticker, so we advanced it to 15 degrees. I drove it 18-20 miles today to my aunt's place and home, and burned over 1/8 of a tank. It was never that bad before! Does anyone have any suggestions that could help? This is killing me!

check EGR and did you rebuild the carb while it was apart?

No. Took the carb off, put it on the shelf, and put it back on.

Did you cover it up to keep the crawly things and general dirt out of it? JB

Do it. Q-jets hate to sit.

Mmm, no.

74chick wrote:Do it. Q-jets hate to sit.

Do what?

Q-jets are cranky sometimes... The shaft that the butterflies are on can get some slop and throw the air/fuel mixture off. It may need a rebuild..

Oh, forgot, turned in the mixture screws too.

Yeah, I was thinking about a rebuild. The one that's on it was rebuilt a couple years ago. It's not the original, but I do have THE original.

I guess you could send the original to Sean Murphy for a really good rebuild.

It might be the actual gas .Try a different place. Just because you never had a problem with it before dosent mean you wont this time. THese days fuel quality is garbage,try an additive maybe it will help.

I get gas at only one place, in all three of my cars. The '74 Monte is the only one with slipping mileage.

There is the little matter of alcohol content, the more there is, the worse your gas milage is. They claim the lower cost of the gas will make up for the lost milage. If you believe that, I have a nice bridge I will sell you real cheap. Why so cheap? It needs painting. JB

How's it running? Anything noticeable like exhaust fumes or a slight miss? I'm still not awake yet so I'm trying to factor out a few things here while I drink a cup o' Joe.

Rago wrote:How's it running? Anything noticeable like exhaust fumes or a slight miss? I'm still not awake yet so I'm trying to factor out a few things here while I drink a cup o' Joe.

Runs perfect.