Odyssey owners... HELP!!!! - Page 2 - Fiberglass RV


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Old 02-04-2006, 11:32 AM   #15
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...The vans are mechanically equipped identically with the exception of leather seating and a few bells and whistles.

Anyone have ideas?

Roger
A whistle here, a bell there and pretty soon you're talking real aero drag. Are you sure they didn't go too far?
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Old 02-04-2006, 12:26 PM   #16
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Steve, thanks for the <ahem> ah... help. I'll be sure to check the Odyssey over to make sure that the problem isn't that it's over-belled or over-whistled.

Roger
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Old 02-05-2006, 03:18 PM   #17
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My folks have an '03 Odyssey that they [b]bought last summer.
Anyone have ideas?

Roger
I had a thought, but they bought it before Hurricane Katrina...
never mind...
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Old 02-05-2006, 03:25 PM   #18
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The two things that I have observed that lowers gas milage, they are:

1) Two footers - people who drive with one foot on the accelerator and one foot on the brake pedal. The latter prematurely wears out the brakes and has been known to cause tire fires.

2) Wheel alignment - it is surprising how much just a little kiss of a curb when parking can cause the front wheels to be mis-aligned. I Have the front and rear alignment checked every time the wheels are rotated.
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Old 03-02-2006, 10:37 PM   #19
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Roger, have you got this figured out yet? Before buying our van I was a frequent reader of messages on the odyclub.com forum. There was one person who complained at great length about his poor gas mileage. He was not pleasant about it. Wonder if your father bought his van?, or are there a couple of vans with this problem. If you haven't been to odyclub.com you might want to look at their forum area. They have one for problems. You can look without subscribing, but if you want to search you might have to subscribe. Been a long time since I have used that site.

Nancy in MN
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Old 03-03-2006, 09:57 AM   #20
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We're very happy with the mileage on our Odyssey 2004.. but on the Odyssey forum there are several who do report very low mileage and they are unhappy. Our 2000 Odyssey also had good mileage. Could it be where the Odyssey was built?

Good information and discussions on the Odyssey....
http://www.odyclub.com/forums/
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Old 03-03-2006, 06:41 PM   #21
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...Could it be where the Odyssey was built?
The assembly plant is likely relevant to quality control, but to me that just means a vehicle coming out of the less-desirable factory is more likely to have a fault; the extremely poor mileage of this vehicle seems like a fault, rather than an expected characteristic which varies by assembly location.

The Japanese manufacturers have been very careful to avoid wrecking their reputations for quality by falling to standards of their additional assembly locations (such as those in North America), but they have also been careful to avoid placing products from different countries side by side. At one point, Honda assembled Accords for the U.S. in both Japan and the U.S., but only supplied areas east of the Mississippi with U.S. product, and areas west of the Mississippi only with Japanese product: no one was likely to put them side-by-side and point out detail differences.

Anyway, if one source tends to produce a particular defect, that might be a good thing to check for on a specific vehicle. The origin should be on a placard, which I think is likely on the door jamb.
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Old 03-03-2006, 11:49 PM   #22
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RogerH,
Is it possible that the two vehicles' have different differential ratios? That can make an enormous difference in fuel consumption.
Kurt & Ann K.
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Old 03-04-2006, 05:03 PM   #23
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Final drive ratios are still an optional choice on trucks, but rarely in other types of vehicles - the design is too highly integrated to allow the buyer to change just one component. With a pickup (or some SUVs), I think this would be a good thing to consider.

The effect of a very low (numerically high, lots of reduction...) final drive would be similar to driving in a lower gear, which seems to be the common guess for the source of the problem

So, Roger, it's been a month... any progress?
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Old 03-11-2006, 09:25 PM   #24
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Well interestingly, I just spoke with my folks about this today and I hadn't seen the new posts here!

Apparently with this last tank of gas, the mileage jumped up to 27mpg where it ought to be. Honda is still looking into figuring out what's going on. This is turning into a really bizarre kind of problem. I'm beginning to wonder if it's a programming issue and the computer is only working part-time and goes back to it's defaults when it doesn't work. In other words, it runs ok, but not optimally when the system is goofy. Just a thought...

Regarding the final drive ratio, you can specify your ratios in a conventional rear-wheel drive vehicle. For example, my Excursion has 3.73 gearing. A friend here in town had one with a 4.10 ratio and his gas mileage was half what I get with the same engine, the V10. Anyway, I don't think you can change the gear ratios in a transaxle; at least I've never heard anyone discuss it in those terms.

Thanks again everyone for your great suggestions! I've passed them all along to my Dad to explore with the dealer.

Roger
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Old 03-12-2006, 12:51 AM   #25
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Apparently with this last tank of gas, the mileage jumped up to 27mpg where it ought to be.
I just did a round trip from Palm Springs, CA to Lake Havasu City, AZ today. My Odyssey went about 450 miles on one tank of gas (not towing), a little less than 17 gallons. (The yellow fuel idiot light was on for about the last 50 miles.) It figured out to be 27 mpg also. Mine is California emission equipped.
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Old 03-12-2006, 07:29 PM   #26
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A variety of final drive ratios are often available in the same transaxle, to suit the needs of different models, engines, or option packages; however, the choice is rarely offered to the retail customer. There is less room (literally) to arrange a different ratio in a transverse transaxle than typical separate differential housing so the ratio choice isn't as wide, but in both cases there is a small driving gear and a larger driven gear (these are the pinion and ring in the regular diff) and the relative sizes determine the ratio.

In a combination which I find interesting, according to the Honda Canada website the Ridgeline has a 4.533 ratio final drive in the front, a 0.537 transfer gear, and 3.384 final drive in the rear. The front and rear axles would need to go at different speeds, which I assume is required for Honda's slip-clutch power distribution scheme (VTM-4) to work. The Pilot is allegedly built of the same family of components, and the Odyssey certainly uses the same engine (and likely a variation of the same transaxle) but we can only guess at the gear ratios, because Honda only shows the ratios for the pickup truck; truck buyers apparently care about gear ratios.

In passenger cars, even ones with "conventional" rear-wheel drive, choices in final drive ratio are much less likely to available than with trucks and SUVs.

Anyway, Roger's parents' Odyssey certainly didn't grow a new gearset by itself, so that isn't the cause...
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