MPG indicator
#122
Agree with SpecBoy
well the 6.8 and 1.5 tanks were back to back. they balance each other out to be about 4.x mpg. That's what I'm averaging and if one pump is off by a bit, the next one usually compensates for it. That's why keeping track over the long term will make sense.
~SB
~SB
I have seen my mpg be off for two different reasons, first is like what SB is leading to in this statement is that if a refill is not complete for what ever reason your mpg wil be very close computer's and the next one with a full fill up will have a larger difference but will bring the average of the two back in sync. I have had this occur twice and factors were pump and time of day (weather) differences.
A second way I see a larger difference is based on my stye of driving. For most of one tank I was in a bad mood and was tending to drive more agressively and was harder on the gas pedal and the difference was almost 14%.
SN
#124
#125
Ok, one more time.
The fuel economy gauge is actually an engine efficiency gauge. It calculates expected efficiency as power is delivered from the engine and at the current rate of fuel injection. It DOES NOT ACCOUNT FOR DRIVETRAIN LOSS. Some cars use other sensors that are post transmission, the Fit does not. Manual guys will be 8-10% off, Auto guys will be 15-20% off. Honda aren't going to release a fix for it to current owners, but I think it is a possiblity they will add some sensors in future models to detect post-trans economy.
The fuel economy gauge is actually an engine efficiency gauge. It calculates expected efficiency as power is delivered from the engine and at the current rate of fuel injection. It DOES NOT ACCOUNT FOR DRIVETRAIN LOSS. Some cars use other sensors that are post transmission, the Fit does not. Manual guys will be 8-10% off, Auto guys will be 15-20% off. Honda aren't going to release a fix for it to current owners, but I think it is a possiblity they will add some sensors in future models to detect post-trans economy.
#126
So, is this to mean that if we all head to our dealers we can get this fixed now?
Odd thing- my gauge is actually consistantly very close to actual mpg's- like within a mile, to spot on. I'm considering leaving well enough alone. Weird.
Odd thing- my gauge is actually consistantly very close to actual mpg's- like within a mile, to spot on. I'm considering leaving well enough alone. Weird.
#127
For those of you worried about a dealer running this without your knowledge, this would not come up as a recommended or required update, it is available to assist technicians in troubleshooting a customer complaint.
This is the most apropos use of this phrase ever "YOUR MILEAGE MAY VARY"
b
#129
Last edited by Steve244; 11-22-2009 at 12:39 PM.
#130
Well I will try to remember to ask for upgrade at first service.
So 34 is bad? I get about 41 mpg Cdn or 34 US and I was happy. Maybe I shouldn't be?
I could improve my mileage if I drove the speed limit too but it is so nice to hustle the Fit. My weekly 120 mile trip I drive about 75 - 80 mph.
So 34 is bad? I get about 41 mpg Cdn or 34 US and I was happy. Maybe I shouldn't be?
I could improve my mileage if I drove the speed limit too but it is so nice to hustle the Fit. My weekly 120 mile trip I drive about 75 - 80 mph.
If you do not experience the symptom this isn't a required update; the bulletin does say to check with real, manually calculated mileage data. I ran the update on my car before the bulletin came out; it was labeled with the program number (which is numbers and/or letters that mean nothing) and the non-descriptive label "Mid MPG Update". I thought "hey, maybe I'll get better mileage".... and it went DOWN. Then the bulletin came out about a week later. Oops lol. I'd still rather have correct worse (34.7mpg current) mileage than a higher incorrect number.
For those of you worried about a dealer running this without your knowledge, this would not come up as a recommended or required update, it is available to assist technicians in troubleshooting a customer complaint.
This is the most apropos use of this phrase ever "YOUR MILEAGE MAY VARY"
b
For those of you worried about a dealer running this without your knowledge, this would not come up as a recommended or required update, it is available to assist technicians in troubleshooting a customer complaint.
This is the most apropos use of this phrase ever "YOUR MILEAGE MAY VARY"
b
#132
uh no it isn't. It's an integral part of the fuel injection system. The control unit has this information in order to meter fuel correctly. Displaying the rate of consumption is an easy task with today's electronics, but some geek got a constant wrong so the display is off by a constant amount.
Nothing on a modern car "is just another sensor." All data is polled and used to control the engine. The tach, speedometer, and mpg display are all "just displays" of what your car is doing. For Honda to stick a display front and center that had such a huge error is laughable (at least now they have a software update to fix it).
Nothing on a modern car "is just another sensor." All data is polled and used to control the engine. The tach, speedometer, and mpg display are all "just displays" of what your car is doing. For Honda to stick a display front and center that had such a huge error is laughable (at least now they have a software update to fix it).
#134
I have had this feature on several cars before the Fit, they were always VERY close (within a tenth or two). It's not hard to calculate total fuel injected (pulse time*injector flow rate)/vehicle mileage. The FIT computer was off on my car by approx 10-15% depending on the trip type.
#135
I have a 09 fit LX 5 speed manual here in canada - had it for 1.5 months with just over 2000kms.
I use the following manual calculation: fuel used x 100 divided by kms driven
Please correct me if i'm wrong
I reset the trip counter every fill up
The only items I can cycle are - total kms driven, trip A, oil life, avg kms / litre
My typical is about 6.3L / 100kms (at least thats what the computer says) but my last manual calculation was 6.8 in mostly city driving.
Does the dealer service bulletin apply to canadian 09 fits as well? Any canadians go to their dealer to bring this up?
thanks
I use the following manual calculation: fuel used x 100 divided by kms driven
Please correct me if i'm wrong
I reset the trip counter every fill up
The only items I can cycle are - total kms driven, trip A, oil life, avg kms / litre
My typical is about 6.3L / 100kms (at least thats what the computer says) but my last manual calculation was 6.8 in mostly city driving.
Does the dealer service bulletin apply to canadian 09 fits as well? Any canadians go to their dealer to bring this up?
thanks
#136
I have a 09 fit LX 5 speed manual here in canada - had it for 1.5 months with just over 2000kms.
I use the following manual calculation: fuel used x 100 divided by kms driven
Please correct me if i'm wrong
I reset the trip counter every fill up
The only items I can cycle are - total kms driven, trip A, oil life, avg kms / litre
My typical is about 6.3L / 100kms (at least thats what the computer says) but my last manual calculation was 6.8 in mostly city driving.
Does the dealer service bulletin apply to canadian 09 fits as well? Any canadians go to their dealer to bring this up?
thanks
I use the following manual calculation: fuel used x 100 divided by kms driven
Please correct me if i'm wrong
I reset the trip counter every fill up
The only items I can cycle are - total kms driven, trip A, oil life, avg kms / litre
My typical is about 6.3L / 100kms (at least thats what the computer says) but my last manual calculation was 6.8 in mostly city driving.
Does the dealer service bulletin apply to canadian 09 fits as well? Any canadians go to their dealer to bring this up?
thanks
(Can we program ours to display L/100km instead of MPG? I wonder if it would have the same degree of accuracy? Did I just type this out loud?)
If you're curious, email the bulletin to a honda service adviser up yonder and see what they say. It was just released here last week so they may not have it yet even if it is a problem. Here's the link again:
Fit MPG
#137
i called my dealer service dept.
it took him 10 minutes to find the bulletin. he didn't know of the problem or the bulletin.
he told i'd have to show him my documented mileage vs. what the monitor said. no problem.
and he said the repair will take 60 to 90 minutes.
why should a software fix take so long?
it took him 10 minutes to find the bulletin. he didn't know of the problem or the bulletin.
he told i'd have to show him my documented mileage vs. what the monitor said. no problem.
and he said the repair will take 60 to 90 minutes.
why should a software fix take so long?
#138
First manual check after update
After running the MPG update I filled up this morning, was getting low (put 10.582 gallons into a 10.6 gallon tank)... my computer showed 34.8, my manual calculation showed 34.889. My prior tank showed 36.9, my actual was about 33.
Thats close enough to shave...
b
Thats close enough to shave...
b
#139
i called my dealer service dept.
it took him 10 minutes to find the bulletin. he didn't know of the problem or the bulletin.
he told i'd have to show him my documented mileage vs. what the monitor said. no problem.
and he said the repair will take 60 to 90 minutes.
why should a software fix take so long?
it took him 10 minutes to find the bulletin. he didn't know of the problem or the bulletin.
he told i'd have to show him my documented mileage vs. what the monitor said. no problem.
and he said the repair will take 60 to 90 minutes.
why should a software fix take so long?