Is there something wrong or is this normal??
- Thread starter Speed3girl
- Start date
what's your trip computer reading for gas mileage?
mine is at 21.8 right now, which i think is pretty good for never driving on the highway and it being 100 degrees here every day. i don't ever fill my car up so i can't say anything about the rapid drop...
mine is at 21.8 right now, which i think is pretty good for never driving on the highway and it being 100 degrees here every day. i don't ever fill my car up so i can't say anything about the rapid drop...
knowledge007
Banned
Nice Speed3girl, let me know when the car hits its sweet spot...
justa4banger
Member
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- 2007 SILVER MS3
knowledge007, it is not required to reset the ECU for every mod, BUt when you do the car tends to learn and adapt faster, THATS ALL.
as for decreased mpg or the gas gauge, ye mine drops fast also at 60-70 miles. i also recently installed a MSCAI and last tank of gas got me 14 mpg.
I was hard on the car trying to verify i had all of my extra ponies. i'm pretty sure i accounted for all of them
as for decreased mpg or the gas gauge, ye mine drops fast also at 60-70 miles. i also recently installed a MSCAI and last tank of gas got me 14 mpg.
I was hard on the car trying to verify i had all of my extra ponies. i'm pretty sure i accounted for all of them
Young Roids
Member
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- The pennies have been saved the MS3 is mine!
justa4banger said:
OUch! Gas mileage goes down that bad with the cold air intake?
Speed3girl
Member
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- speed 3
controlo said:
For MPG...that seems to always be the same 24.8 or so....but I NEVER get that mileage per gallon.
Speed3girl
Member
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- speed 3
knowledge007 said:
Will do.
smoknspeed3
Member
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- 2007 Mazdaspeed 3
I know I'm pretty much a new unknown member but I have plenty of years modding Focus's. As a rule of thumb always disconnect the neg. battery terminal for anything the ECU may effect. If you just throw on a CAI and fire the car up the ECU is going to think there is a problem due to the fact the car isn't running the same way it did before the mod. The result will be the ECU trying to compensate with increasing the fuel flow. You will pretty much be telling it the air is actually cooler outside then it really is, thus leading to the crap MPG. If you reset the ECU, when the battery is hooked back up it recognizes a change and sets the air fuel to were it needs to be. Although I have never used the brake thing before interesting idea. Bottom line is, it's always better to disconnect the battery to be safe. Not only does it make it easier for the car but it can prevent any shorts or problems depending on what your working on.
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smoknspeed3
Member
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- 2007 Mazdaspeed 3
SwampAss said:
The reason it has to be disconnected for a period of time, or use the brake method is the ecu will hold a small amount of power to keep everything as it should be.
Working on the Foci we used to disconnect the neg terminal just to reset the ECU to factory specs. As years and months go by the ECU learns the temps and how you use the car and it will change settings. By disconnecting it you automaticly rest everythign back to factory specs. Think of it as the brain. It can learn small things that change the way it performs.
Speed3girl
Member
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- speed 3
Geez.....i guess I will see what happens with this tank of gas....and go from there. I have about 105 miles on my car and it is not to 1/2 tank yet. So we will see.
the7comeback7ki
Member
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- Mazdaspeed 3
+1 for resetting ECU
