Last post on Jul 23, 2010 at 6:36 PM
You are in the SUVs
What is this discussion about?
Ford Expedition, GMC Envoy, Chevrolet Suburban, Ford Escape, Honda CR-V, Nissan Pathfinder, Fuel Efficiency (MPG), SUV
#1052 of 1080 Re: MPG was hurt by disconecting battery... [xtierra]
Dec 02, 2008 (10:37 am)
When you reset the ECU it probably runs ruch until it figures out how far it can lean the air-fuel mix without creating problems. The ECU has to learn again, basically.
As for getting the best mileage, I second the idea of taking excess weight out of the vehicle. My kids, for instance, accumulate junk like Happy Meal toys, and before you know it they have 100 in the car.
New rule - no more toys (they're junk anyway), plus I made them clean out the car. Each child can bring their one favorite toy, that's it.
#1053 of 1080 Re: MPG was hurt by disconecting battery... [ateixeira]
Dec 04, 2008 (2:46 pm)
I second the idea of taking excess weight out of the vehicle.
Seriously You drive a 5000+ pound SUV and you're concerned about the weight of a bag full of plastic toys?
Then again maybe not eating happy meals will keep a couple of hundred pounds off the family average over the long term
Backing off about 5mph would probably yield 10x more in gains.
#1054 of 1080 Re: MPG was hurt by disconecting battery... [wvgasguy]
Dec 05, 2008 (1:15 pm)
Well, I don't drive a 5000 lb SUV, but the person asking does.
Our Forester weighs about a ton less and I hit a 36mpg peak this week. Definitely using every trick in the book, though.
Our van weighs about 4270 if the brochure isn't lying.
#1055 of 1080 Any effect of empty roof rack on mileage?
Dec 12, 2008 (10:51 am)
Edmunds did a test last winter on the mileage effect of an empty vs loaded roof rack. Mileage was about 20% less with a couple of items on the roof rack. I'm wondering if there is a significant effect, say > 1 mpg, of an empty roof rack vs no roof rack at all or if the cross bars have an effect. Fyi, I have a Highlander that came with a roof rack that I have never used.
My guess is that an empty roof rack has little effect on mileage. Anyone seen any data that says otherwise or care to speculate?
#1056 of 1080 Re: Any effect of empty roof rack on mileage? [lmacmil]
Dec 12, 2008 (12:03 pm)
I should take the rails off the roof of my van, and you just reminded me.
I tried once and it was not easy. Gotta ask other Sienna owners what's the trick.
#1057 of 1080 MPG SOLUTION!!!
Dec 14, 2008 (12:09 am)
my 2005 xterra 4X2 would give me close to 400 miles per tank on highway trips.... my fuel gauge went bad and i took 4 months to fix it. once i fixed it along with cleaning my battery posts, i was shocked to see my truck use too much gas.... i was around 11mpg!!!!!! so with 100,000 miles i thought it is something with my engine... cleaned throtle intake, mass air sensor, new spark plugs,new tranny fluid, new diff fluid..... 4 bottles of lucas fuel treatment..... got up to 13.89mpg.... mechanic plugged nissan computer and showed me that my engine was performing at 86%.............. wow........... he re-set the ecu and instructed me to keep rpm's from 1000 to 1500 and drive to and open highway to get to 60 mph with low rmp's and to keep at 60 mph for 15 minutes..... while the ecu completed the re-learing procedure for the air/fuel mixture.....
took a 265 mile trip the following weekend through mountain areas at 70 to 80 mph and got 20.25 mpg////////////// BACK TO NORMAL..
if you notice your mpg dropp, did you have your truck at the dealership? did you disconect the battery? this is the most common cause for bad mpg.
#1058 of 1080 Re: MPG SOLUTION!!! [xtierra]
Dec 14, 2008 (12:28 am)
That's a great tip, XT! Glad you got that fixed.
SUVs and Smart Shopper
#1059 of 1080 Re: MPG SOLUTION!!! [xtierra]
Dec 23, 2008 (10:43 am)
1000 to 1500 rpm? Wow. That truck must be geared super-tall.
Just make sure you don't lug the engine.