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can warped rear rotor cause bad fuel economy? 200

posted by  southern fried volvo on  Mon Jan 3 02:48 CST 2005
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last visit: Thu Dec 19 00:38 CST 2013
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Two weeks ago, I changed the brake pads on a 1991 Volvo 240 with automatic transmission. While doing the job, I noticed the REAR left rotor was warped. (As I turned the rear axle, the rear left rotor would stay in line, then suddenly scrub against the brake caliper. Also, the previous pads were all worn, but the rear left outer pad was EXTREMELY worn down to the metal.

Ever since the brake job, fuel economy has dropped from 22-24mpg down to 15-18mpg. Right after the brake job, the temperature briefly dropped below freezing for a few days, so I thought another component was causing the gas-guzzling issue. But now that the temp has gone back into the 50-60 degree range, fuel economy is still terrible.

Can a warped rear rotor cause a 5mpg drop in fuel economy??? Did I worsen the problem by placing new pads on these (1 year old) rotors? Or is another component causing the problem? (Fuel Pressure Regulator, Coolant Temp Sensor, Fuel Filter, etc.)

NOTE: The Brickboard is always right. Those cheap AutoDrone "lifetime" brake pads did not last very long. This time, I got a better brand.

[[ southern fried volvo '91 240 165k mi ]]






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New can warped rear rotor cause bad fuel economy? [200]
posted by  southern fried volvo subscriber  on Mon Jan 3 02:48 CST 2005 >


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