 Alternator |
 Nov 15, 2011 - 5:08 AM
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 Enthusiast  Joined Feb 15, '08 From Royal Oak, MI Currently Offline Reputation: 7 (100%)  |
I recently replaced my alternator last month and I have noticed a decrese in fuel economy.
Do Alternators affect fuel economy in any way? This is assuming that no other factors are changed like tire pressure or tune up. Thanks -------------------- God made man....
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Nov 15, 2011 - 8:41 AM
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 Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
Yes
-------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Nov 15, 2011 - 8:54 AM
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Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
The alternator runs off of your engines power. Just like EVERYTHING else in, on, or attached to your car.
Add weight, lights, system, roof rack, etc will affect MPG. A new alternator has tighter bearings = more drag on the engine. Or maybe it has a lower efficiency which means it takes more torque to produce the same amount of amps. I wouldn't expect a noticeable drop in MPG though. maybe 1 at the most. was the belt over tightened? That will cause unneeded drag. Are you sure nothing else changed? -------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Nov 16, 2011 - 4:23 AM
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Enthusiast Joined Feb 15, '08 From Royal Oak, MI Currently Offline Reputation: 7 (100%) |
Just the tire pressre was low. I will see on my next trip to SoCal if that was just the tire pressure.
How will I know if the belt is too tight? When I replaced it, I went to autozone to get it checked and the guy said that the tension is fine. -------------------- God made man....
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