Mechanics

POOR GAS MILEAGE

1990 Cadillac Seville

Engine problem
1990 Cadillac Seville V8 Front Wheel Drive Automatic 78000 miles

ALL OF A SUDDEN MY CAR SMELLS OF GAS AND IS GETTING HORRIBLE MILEAGE. I'VE CHECKED FOR LEAKS AND FOUND NONE. I RECENTLY HAD A TUNE-UP DONE A COUPLE OF INJECTORS REPLACED AND A NEW DISTRIBUTOR INSTALLED. I'M GETTING ABOUT 10 MPG AND IT USED TO BE ABOUT 18 MPG. ANY HELP WOULD BE APPRECIATED.
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8008MAN
February 4, 2008.



Is it missing? Or running bad? Scan the codes for me, off and warmer on the heater/AC control head. Codes will come up in the control head, write them down

Tiny
Buzzsaw
Feb 4, 2008.
Is it missing? Or running bad? Scan the codes for me, off and warmer on the heater/AC control head. Codes will come up in the control head, write them down[/quote: 000ec0afc0]

It is not missing and it seems to run ok? It just has NO power and it is sucking down the gas. Also just yesterday it started doing another wierd thing. When you go to start it, it chimes, like a door chime. It never used to do that. Anyway here are the codes. NO ECM CODES, B112 Current, all the rest of these are History Codes B120, B122, B333, B334, B335, B336, B337 & B552. Can you tell me how to clear these history codes.

Tiny
8008MAN
Feb 5, 2008.
Is it missing? Or running bad? Scan the codes for me, off and warmer on the heater/AC control head. Codes will come up in the control head, write them down[/quote: 9aee99968f]

It is not missing and it seems to run ok? It just has NO power and it is sucking down the gas. Also just yesterday it started doing another wierd thing. When you go to start it, it chimes, like a door chime. It never used to do that. Anyway here are the codes. NO ECM CODES, B112 Current, all the rest of these are History Codes B120, B122, B333, B334, B335, B336, B337 & B552. Can you tell me how to clear these history codes.[/Quote: 9aee99968f]
I went out and cleared the codes and the only one that comes back is B112.

Tiny
8008MAN
Feb 6, 2008.