|06-21-2013 12:02 PM|
|06-21-2013 11:55 AM|
|06-21-2013 09:26 AM|
|06-21-2013 09:25 AM|
I appreciate your time, sir!
|06-21-2013 12:31 AM|
|06-21-2013 12:23 AM|
|Jerry Bransford||I did mean it the other way Holten, that a 15x10 wheel is way too wide for a 10.5" wide tire. Thanks for catching that. I certainly wouldn't run anything narrower than a 12.5" tire on a 10" wheel, though a 15x8 wheel would be ideal for combined off-road and on-road use with a 12.5" wide tire.|
|06-21-2013 12:05 AM|
I think I get you, though. My rims are stupid wide, thanks to the previous owner. I do not air down; not once in ten years. So that is not a real consideration for me.
So you are saying that with my very wide rims that I am pretty much stuck with 12.5" wide tires? I guess I need new rims. At least they are nice Mickey Thompsons; might be able to sell them and get some Cragar Soft 8s or the like...
So if I wanted to use 32x11.5 I ought to have 8" rims? And if I go with the narrow 33x10.5" tires I can use the same ones (accounting for backspacing and such, that is)?
|06-20-2013 06:01 PM|
|Jerry Bransford||A 10.5" wide tire would be way too wide for a 15x10 wheel. A 15x7 wheel would be optimal though a 15x8 is fine too. I won't even run a 10" wide wheel with 12.5" wide tires when they are aired down for offroading.|
|06-20-2013 05:53 PM|
|06-20-2013 04:44 PM|
|06-20-2013 04:37 PM|
My 97 doesn't have a 19 gallon tank, wish it did, wish I knew where one was.
Gas gauge, it's an indicator, it should read, yep lots of gas, some gas, getting low.
If my red light goes on, I had better have a gas station in sight because the gauge falls very very fast when the light is on, maybe good for 10 miles.
I do go 300 miles on a tank of fuel (small tank,) when I have the hard top on, but cant with the soft top or no top.
I have been told not to run the Jeep below a 1/4 tank, that the fuel will cool the pump.
Not sure if this is true or not, but I haven't run out of fuel since I started this.
I can easily do 20mpg with the hard top driving under 70 mph
|06-20-2013 03:44 PM|
|06-20-2013 03:43 PM|
|06-20-2013 03:28 PM|
|06-20-2013 03:27 PM|
To me is sounded like he was thinking it was old fuel. But I do not know. I see what you mean, though. If he had actually refused to tell me (had I asked for the code that it was throwing) I would have been pretty put off by that.
And he was correct in that it drove for 243 miles mostly at about 65 to 70 mph (actual, not what the speedo read, which is five lower). No light all the way home, with two times stopping and restarting, so that the computer had a chance to check things fresh each time. No light at all. Then this morning it was on again...
|06-20-2013 03:26 PM|
|biggus35||Same problem here. I just ran my 2002 X as empty as I thought I could safely get away with. It only held 15.172 gallons. It was way in the red and the light had been on for 20+ miles.|
|06-20-2013 03:25 PM|
So obviously my gauge is wonky. I will "learn" the vehicle as I drive it. And I will give it a tune up to see if the MPG comes up a bit. I am certain the tires are causing some of the low MPG as they are really wide (a no-go for good mileage) and worn nearly bald in the center with next to no lugs left on the surface. After tires I will measure MPG again as carefully as I can for several tanks and report back about what is going on. Should I bump this thread or start a new one? Most of the places I surf encourage longterm bumps for historical reasons. This place seems to frown on bumping. How weird...
My build sheet says "3.73 rear axle" and I do not know whether it has been re-geared. How can I check the gearing? Would this affect the MPG? It has mucho pick up from a dead stop.
It also reads, "Upgraded OBD II Connectors." Can I purchase a reader for this connection? Or will the old standby key on-off-on-off-on give me the code for the CEL?
|06-20-2013 03:21 PM|
When the gas light comes on I take note of the ODO. I then know I can go safely another 50 to 60 mi or so and have 2 gal reserve.
|06-20-2013 03:18 PM|
|06-20-2013 03:16 PM|
|06-20-2013 03:13 PM|
But actual miles and actual gallon amounts are what I need. And that is what I used. Again, they came out to almost 13.9, which tells me that the very worn 33x12.5 tires are sucking the gas due to the width and the weight. That, too, will be sorted soon. I just have having to wait for TireRack.com to ship me stuff. I am impatient! HA!
I have had a CEL twice in two days. I will look to that to see if my mileage problems are in the engine. I hope the better tires will help but know that at 33" probably my mileage will always be mediocre.
But the dang gas gauge inaccuracy was alarming since my SE's gauge is so much more accurate. This Sport's gauge was sort of frightening out in the middle of nowhere late at night in the Mississippi Delta on HWY 1 and HWY 61. There is no place to stop out there if you run out of gas, and the stations can be 50 miles apart or more in long stretches of the route I took. At least I know now that there is a 19 gallon capacity despite the gauge indicating that there is only 16...
|06-20-2013 03:07 PM|
|06-20-2013 03:03 PM|
Okay, according to Google maps, from the gas station in Hot Springs where I filled up before my trip home to the gas station where I filled up when I got home is 243 miles. The Jeep's trip odo reads 221.
It is also reading exactly 5 mph slower than my wife's 2010 Honda Accord. Do newer Accords still have the mph set to read off by 3 as in the past? I have not heard of this changing, but it seems with so many people using GPS to figure MPH that they would give up on this practice.
So we have a difference of 22 miles on the Jeep from the Honda and Google, reading short. It moves faster than indicated.
I suspect the speedo gear was never chanced after the 33s were put on.
I will do that soon.
The MPG numbers are (more accurately) 243 miles using 17.5 gallons. I get about 13.9 — Still not so good.
Build sheet specifies that this has a 19 gallon tank. So roughly 16 show up in the range of the gauge. I guess when it reads E I will have about three gallons left.
New issue: CEL
When I bought it the tank read more than 3/8 full (whatever that means) and before filling it, like 50 yards from the seller's place (and right after having had the inspection run) the CEL came on. Ugh! So we went back the the dealership and had them run the codes. They did not tell me what they found but said it was running lean. They asked whether I had just filled it up. I said no. They said it was probably a "bad gas issue" but never explained shat they meant by that. They reset it and told me to fill it up. It might come back on but probably not. I filled up and drove 243 miles home and it never came back on. I stopped twice on this trip for gas. The CEL never came back on.
This morning I started it cold and the CEL came on right away. X-[
|06-20-2013 02:53 PM|
You know I have yet to find anyone who can put 19 gals of gas in one of these 19 gal tanks? I'm thinking seriously about running mine out of gas then towing it to the gas station and filling it up.
That and I have the most consistent Jeep I've ever seen, fill it go 250 miles ( low gas light comes on about 250 ) takes 15 gals to fill it up again. I,ve checked it 5 tanks in a row since I re-geared it ( went from 4.10's to 4.56's I have 33's and 4" lift ) solid 16.5 mpg since re-gear from a previous consistent 15mpg
Yes I installed the correct speedo gear also.
|06-20-2013 02:34 PM|
|06-20-2013 02:33 PM|
|06-20-2013 02:26 PM|
|Jerry Bransford||X2 on the info in post #2 above. No gas gauge is even close to being accurate enough for mpg calculations, the only accurate way to calculate mpg is as above.|
|06-20-2013 02:23 PM|
Basically with a 19 gallon tank...fill, go about 230-250miles, repeat. It is what it is.
|06-20-2013 02:19 PM|
The first thing I would do is correctly check your mpg.
1. Fill tank
2. Set trip Odometer to 0
3. Run till fuel gauge is near empty
4. Fill up and make note of gallons
5. Divide #of miles on odometer in step 4 / # of gallons in step 4.
*edit - you can get the build sheet from Jeep that will tell you what gas tank you have.
|06-20-2013 02:09 PM|
MPG/Gas Gauge Accuracy
I bought a 2003 Sport yesterday. It was five hours from my home, and in driving it back It seemed to only get 13 mpg. (It read about 5/8th empty when I bought it. It took 8 gallons to fill it from that mark. Drove about 240 - 250 miles. Stopped once to top up and filled it up when I got home. I used a total of 18 gallons on the trip of 250 miles.)
This gas gauge drops quickly. On my old SE 2.4L I would have about 35 miles on the tank before the needle would even move, averaging about 70 miles per quarter tank. On this Sport it read nearly a 1/4 tank down at 40 miles into my trip home. Then the needle hung there for a while. At just below 3/4 of a tank (according to the gauge) it took 11.5 gallons of gas until the pump cut off.
Doesn't the Sport have a 19 gallon tank in all cases? Even my SE with its 15 gallon tank *actually* has the 19 gallon one with an alteration to the fill tube so that it cuts off at 15 (by design, but actually mine allows filling up to 17 gallons). If the gauge on this Sport is correct then my tank is full at 15 gallons. This cannot be correct...
Could the previous owner have had the sending unit replaced and an SE on have been put in by mistake? Or is the gauge really as bas as people say? How do I test it? I have heard driving a modern car (late 1990s or newer) until it runs dry and dies is really bad for the injectors.
(I was thinking of carrying a 5 gal jerry can and driving it until it ran out to see ho the gauge reads and then see how much it takes to fill it up. I would have to do this when it is very nearly empty and just drive around very close to the gas station, fill it with the jerry can and add 5 gallons to the total I put in at the pump. Again, bad idea???)
I am running exceedingly worn 33x12.5x15 tires and know this is part of the MPG issue. That will be corrected soon enough. But the gauge worries me some.