Register FAQ Members List Calendar Search Today's Posts Mark Forums Read   Cars Lounge > Cars Lounge > Toyota > Toyota Prius ECU Flash affects MPG? User Name Remember Me? Password   Thread Tools Search this Thread Display Modes   #1   08-23-2006, 12:55 PM Phrederick Junior Member   Join Date: Oct 2003 Posts: 92 ECU Flash affects MPG? There's a growing rumor that the last Engine Control Unit program update has caused the engine to operate more frequently, thus lowering the miles per gallon. I thought I had lost some miles per gallon to the hot weather until I heard this. Anyone have any support for this? Note to Toyota, I bought this vehicle because it looked like a good technological compromise to achieve higher mileage. You've released the Hybrid Highlander, the GX400h, and the Hybrid Camry with minuscule improvements in the mpg versus their gasoline only counterparts. I think you're missing a significant market if this rumor is true and you continue releasing vehicles with only minor mileage improvements. Phrederick View Public Profile Find all posts by Phrederick Add Phrederick to Your Buddy List   #2   08-23-2006, 01:28 PM Russ Greene Junior Member   Join Date: May 2006 Posts: 8 ECU Flash affects MPG? "NeoPhyte_Rep" <abuse@127.0.0.1> wrote in message news:xh3Hg.8735$E_.1841@trnddc06... Quote: There's a growing rumor that the last Engine Control Unit program update has caused the engine to operate more frequently, thus lowering the miles per gallon. I thought I had lost some miles per gallon to the hot weather until I heard this. Anyone have any support for this? Note to Toyota, I bought this vehicle because it looked like a good technological compromise to achieve higher mileage. You've released the Hybrid Highlander, the GX400h, and the Hybrid Camry with minuscule improvements in the mpg versus their gasoline only counterparts. I think you're missing a significant market if this rumor is true and you continue releasing vehicles with only minor mileage improvements. Not sure where you are getting your infomation, but both our cars are fully updated and they are doing equal or better than the last time they were serviced. The older of the 2 averaged 58+ mpg on a trip from MA to NC and back. Second, it's not only about the MPG's but about greatly reduced emissions from the hybrid synergy drive as well that makes the hybrid version a 'better' car than the gas-only version. Russ Greene View Public Profile Find all posts by Russ Greene Add Russ Greene to Your Buddy List   #3   08-23-2006, 02:33 PM Bill Junior Member   Join Date: Sep 2005 Posts: 183 ECU Flash affects MPG? "NeoPhyte_Rep" <abuse@127.0.0.1> wrote in message news:xh3Hg.8735$E_.1841@trnddc06... Quote: There's a growing rumor that the last Engine Control Unit program update has caused the engine to operate more frequently, thus lowering the miles per gallon. I thought I had lost some miles per gallon to the hot weather until I heard this. Anyone have any support for this? I didn't see any change in my fuel economy. Quote: Note to Toyota, I bought this vehicle because it looked like a good technological compromise to achieve higher mileage. You've released the Hybrid Highlander, the GX400h, and the Hybrid Camry with minuscule improvements in the mpg versus their gasoline only counterparts. I think you're missing a significant market if this rumor is true and you continue releasing vehicles with only minor mileage improvements. I call them feel-good-hybrids. They are essentially meaningless as far as conservation is concerned. I heard GM as some truly phony hybrids. Bill View Public Profile Find all posts by Bill Add Bill to Your Buddy List   #4   08-23-2006, 09:28 PM Carpe Diem Junior Member   Join Date: Jul 2006 Posts: 20 ECU Flash affects MPG? .... Quote: There's a growing rumor that the last Engine Control Unit program update has caused the engine to operate more frequently, thus lowering the miles per gallon. Where did you hear that rumor?! Carpe Diem View Public Profile Find all posts by Carpe Diem Add Carpe Diem to Your Buddy List   #5   08-24-2006, 05:40 AM Phrederick Junior Member   Join Date: Oct 2003 Posts: 92 ECU Flash affects MPG? Carpe Diem wrote: Quote: ... Quote: There's a growing rumor that the last Engine Control Unit program update has caused the engine to operate more frequently, thus lowering the miles per gallon. Where did you hear that rumor?! From another owner who had his service performed about the same time I did and also had his mpg drop noticeably. That's why I came here, to see if it was only a small sample or a more widespread occurrence. Phrederick View Public Profile Find all posts by Phrederick Add Phrederick to Your Buddy List   #6   08-24-2006, 06:42 AM Carpe Diem Junior Member   Join Date: Jul 2006 Posts: 20 ECU Flash affects MPG? "NeoPhyte_Rep" <abuse@127.0.0.1> schreef in bericht news:k%hHg.13706$RQ5.3400@trnddc03... Quote: Carpe Diem wrote: Quote: ... Quote: There's a growing rumor that the last Engine Control Unit program update has caused the engine to operate more frequently, thus lowering the miles per gallon. Where did you hear that rumor?! From another owner who had his service performed about the same time I did and also had his mpg drop noticeably. That's why I came here, to see if it was only a small sample or a more widespread occurrence. To me, "growing rumour" seems to be an overstatement. Carpe Diem View Public Profile Find all posts by Carpe Diem Add Carpe Diem to Your Buddy List   #7   08-24-2006, 08:44 AM Bill Junior Member   Join Date: Sep 2005 Posts: 183 ECU Flash affects MPG? "NeoPhyte_Rep" <abuse@127.0.0.1> wrote in message news:k%hHg.13706$RQ5.3400@trnddc03... Quote: Carpe Diem wrote: Quote: ... Quote: There's a growing rumor that the last Engine Control Unit program update has caused the engine to operate more frequently, thus lowering the miles per gallon. Where did you hear that rumor?! From another owner who had his service performed about the same time I did and also had his mpg drop noticeably. That's why I came here, to see if it was only a small sample or a more widespread occurrence. After the ECU update, performed in conjunction with my 10K service, I too thought my mileage had been impacted, possibly because I had read this rumor in the Yahoo group. I checked my tire pressure to find they had seriously lowered it (low to mid 30's) in conjunction with the tire rotation. I put it back to 42/40. Over the next few tanks my mileage was as expected given the nature of the trips, wind conditions, etc. I can't honestly attribute my initial and subsequent findings to the ECU update, tire pressure or paranoia arising out of the rumor but I suspect the latter. Bill View Public Profile Find all posts by Bill Add Bill to Your Buddy List « Previous Thread | Next Thread » Thread Tools Search this Thread Show Printable Version Email this Page Search this Thread: Advanced Search Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts vB code is On Smilies are On [IMG] code is On HTML code is Off Forum Jump Please select one User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home -------------------- Cars Lounge     General     Acura     Alfa Romeo     Audi     BMW     Dodge     Ferrari     Fiat     Ford         Ford Explorer         Ford Falcon         Ford Festiva         Ford Flathead         Ford Focus         Ford Mustang     GM         GM Cadillac         GM Cadillac Deville         GM Camaro         GM Camaro Firebird         GM Chevy Malibu         GM Corvette         GM Fiero         GM Oldsmobile         GM Pontiac     Honda     Hyundai     Infiniti     Isuzu     Jaguar     Kia     Lexus     Mercedes Benz     Mini     Mitsubishi     Nissan     Peugeot     Porsche         Porsche 911         Porsche 928         Porsche 944     Rolls Royce     Saab     Subaru     Toyota         Toyota Camry         Toyota MR2         Toyota Prius     Volkswagen         Volkswagen Beetle     Volvo All times are GMT -8. 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