Bad gas mileage = Bad ECU?
#1
Ero-sennin
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Bad gas mileage = Bad ECU?
so i took my car in to Mazda today for a list of problems including CEL flashing, car stops accelerating, door rattles, and oil light comes on at high speeds...just for fun i also threw in bad gas mileage...you know what they said? there's a new ECU reflash that fixes the bad gas mileage...of course i asked them by how much does it help and of course they didn't know...i'll keep you posted if i see a difference but i'm not holding my breath...
also, they supposedly fixed all my problems with a total of 2 ECU reflashes, 1 for the check engine light and bad gas mileage and 1 for the CEL light and the acceleration problem...if they told me they fixed my door rattles with an ECU reflash i woulda cried...
also, they supposedly fixed all my problems with a total of 2 ECU reflashes, 1 for the check engine light and bad gas mileage and 1 for the CEL light and the acceleration problem...if they told me they fixed my door rattles with an ECU reflash i woulda cried...
#3
Go put some miles on the car and let us know. Hopefully your MPG goes up to 22-23 which would be a nice New Year's present for all 8 owners...but I'm not holding my breath :p
#4
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More snake oil cures........Jeez, everyday a new post on how they fixed the mpg saga. Has any of them actually worked?
If this does indeed work for you, and you can back it up, I'll apologize. I would like a little better fuel economy.
If this does indeed work for you, and you can back it up, I'll apologize. I would like a little better fuel economy.
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I had a check engine light come on several times and it was this problem http://www.finishlineperformance.com...01-024-03.html . Since Ive had this done my gas mileage has gone up from < 15mpg to > 17mpg. If your vin is listed in that bulletin you may want to take the car in and let them know. Its not a huge improvement but well worth it imho.
#6
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better gas mileage would be good fore sure however you gotta figure in order to flash the ecu and make it get better mileage it has to effect the HP somehow cause it probably sends less gas in each combustion of the engine.
#7
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I actually had my engine replaced, and then my ECU flashed. At first I thought the mileage was better (it got down to 12-13 right before the engine failed). My new engine consistently gives me 15 MPG or so- no more no less (~205 Miles on 13.5 gallons at fillup). This is what my old engine had before the ECU flash.
#8
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Re: Bad gas mileage = Bad ECU?
Originally posted by BRx8
if they told me they fixed my door rattles with an ECU reflash i woulda cried... [/B]
if they told me they fixed my door rattles with an ECU reflash i woulda cried... [/B]
*** NOTE ***
for the newbies that really dont know i am joking
#9
Ero-sennin
Thread Starter
Originally posted by NAVILES16V
More snake oil cures........Jeez, everyday a new post on how they fixed the mpg saga. Has any of them actually worked?
If this does indeed work for you, and you can back it up, I'll apologize. I would like a little better fuel economy.
More snake oil cures........Jeez, everyday a new post on how they fixed the mpg saga. Has any of them actually worked?
If this does indeed work for you, and you can back it up, I'll apologize. I would like a little better fuel economy.
i got the car back and it feels no different, even after the oil change and ECM reflashes...NO it doesn't feel any faster and they didn't fix the rattle in the door...i wasn't able to hit 80 to test out the oil light problem...we'll see about the mileage after my next fill up
Originally posted by idle0ne
didnt you know they have a new ECU fix, they can flash it and have every bolt/connector/screw automatically tighten on thier own ECU fix for everything haha
didnt you know they have a new ECU fix, they can flash it and have every bolt/connector/screw automatically tighten on thier own ECU fix for everything haha
Last edited by BRx8; 01-05-2004 at 06:34 PM.
#11
Ero-sennin
Thread Starter
i don't see that...i have only 3 stickers under the hood: port campaign sticker, air conditioning warning, and a routing diagragm for the vacuum hose, i believe...
on the paperwork, it lists the cause of the CEL as
EGI DIAG
F0008XDX EGI SYSTEM, DIAGNOSIS
and the cause of the low oil warning as:
F0010XFX POWERTRAIN CONTROL MODULE - REFLASHING
on the paperwork, it lists the cause of the CEL as
EGI DIAG
F0008XDX EGI SYSTEM, DIAGNOSIS
and the cause of the low oil warning as:
F0010XFX POWERTRAIN CONTROL MODULE - REFLASHING
#14
Ero-sennin
Thread Starter
Originally posted by idle0ne
did the ECU flashing seem to lower your HP at all?
that would be great if you could get better gas mileage and not sacrifce any HP
did the ECU flashing seem to lower your HP at all?
that would be great if you could get better gas mileage and not sacrifce any HP
1) it's 15 degrees outside and there's ice on the ground so my tires spin out of control if i push them
2) i picked it up after work so it was rush hour...
i did get a chance to push it a little and i'm probably just lying to myself but it seemed to give a little push around 5000RPMs and there wasn't as noticeable of a dip at 6250RPMS...the same 7250RPM push was still present...again it could all just be the weather conditions and myself lying to myself...if there is a difference at all, it's not noticeable and not even worth mentioning...it's definitely not any slower at least
#16
Ero-sennin
Thread Starter
Originally posted by idle0ne
cool,
now i gotta figure out if the dealership will flash it free before i buy the car
cool,
now i gotta figure out if the dealership will flash it free before i buy the car
edit: of course it wouldn't hurt to know you have the latest and greatest...hehe
Last edited by BRx8; 01-05-2004 at 07:34 PM.
#17
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Originally posted by idle0ne
better gas mileage would be good fore sure however you gotta figure in order to flash the ecu and make it get better mileage it has to effect the HP somehow cause it probably sends less gas in each combustion of the engine.
better gas mileage would be good fore sure however you gotta figure in order to flash the ecu and make it get better mileage it has to effect the HP somehow cause it probably sends less gas in each combustion of the engine.
#18
actually better gas mileage *could* even mean better hp. if the ecu reflash makes your engine more efficient it's conceivable it could have more power/fuel. giving it both better hp and better mpg.
#19
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Just had mine worked on Monday. They replaced the oil pan and the clutch bearing. I will call and see if they did the reflash also. If not, I'll get it done next time I am at the dealer.
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