Since I did my head gasket swap I have been getting atrocious mileage. Is there any thing I could have done wrong on the reassembly that could cause me to be getting 15 MPG when I used to get between 18 and 21? I have been going super conservative on this tank and I'm still burning through gas much faster than I ever have before. My AC also stopped working. I doubt it is connected, but maybe it's dragging the engine? Help. :-(

 

I get an average of 15 mpg.. and my cars fine...

 

Its possible if your compressor is locked up, then the motor could be working harder to turn the pulley on the compressor and that could be causing it. You might have a vacuum leak somewhere which could also be the culprit.

 

Really? That's as bad as I got in my 94.

 

Connected the egr back correctly? No vacuum leaks?

 

My thoughts. vacuum leak or something isn't hooked right. also how long did you run it with bad gasket? did it swallow alot of coolant? might have a hurt cat jus not dead enough yet.

 

I didn't lose much coolant. Maybe a pint? Vacuum leak is a possibility but I can't hear it anywhere.

 

Idle speed? Cel?

 

To be honest, I get between 16-18 in my sixxer and around 15 in the 95. Of course I beat the **** out of the sixxer, but that beside the point.

 

LOL I get 18 in my 500. LOL

 

Mileage is about 22 city 27 Highway. I have gotten as low as 15 open tracking.

 

I got in the 20's easy before the gear change but I still get better than 15mpg cruising. I would run a scan on it anyways.

 

Yeeeaaaaaaa

 

That sounds like you don't believe me. LOL

 

No i believe you just fine, its more an admittance on how terrible mine is.

 

I get 12 city and around 15 high way.

 

Idle speed is steady between 700 and 800 RPM. No CEL.

 

Hmm. Then put your foot on a diet.

 

That's asking a little to much!!

 

Quick way to check for a vacuum leak, is to spray wd40 around the mating surfaces. If you hear any change in the way the engine runs, in any certain place then you've narrowed your search.