Lincoln vs Cadillac Forums

(This is the forums archive - If you want to get back to the main site simply click the banner above and you will be taken to our homepage.)

Lincoln vs Cadillac Forums is the Ultimate Online Resource for Owners and Enthusiasts of American Luxury Cars. Feel free to browse through our archive - but make sure you make it back to our main site - Lincoln vs Cadillac Forums

Cadillac XLR : Cadillac CTS : Cadillac : 2005 Cadillac STS : Cadillac Forums : 2000 Lincoln LS : Lincoln Mark VIII : Lincoln Mark VII : Car Wax
Lincoln Town Car : Lincoln Air Suspension : Lincoln Continental : Lemon Law : Do It Yourself Car Repair : Lincoln vs Cadillac Forums : Mesothelioma

Back to the Archive Main Page

Pages: 1

SES light, OBD codes, help!

(Click here to view the original thread with full colors/images)

Posted by: Frankie Sixxxgun

Well, since I put the new fuel pump on my car, it has a problem with running rich. The engine is throwing a code 12, normal, a code 34, MAP voltage, and 45, rich exhaust. I didn't think this car had a map sensor since it was carbureted. The guy at the carb shop says my fuel pump is putting out 11 PSI of pressure, but if that were the case, I should be rich all the time. It's random and usually accompanied by an SES light. Anybody have any ideas? I replaced the O2 sensor along with the fuel pump and the carb has been recently rebuilt. I'm sure the carb is in need of a tuning though.

This is a 1987 Fleetwood Brough with the 307 Olds. The carb is the stock Rochester E4MC.

Posted by: Frankie Sixxxgun

The problem was related to a vacuum line that, in a roundabout way, went to the MAP sensor. I plugged it back in and the car runs great.