jack speedo reading slow

Submitted: Wednesday, Jun 13, 2007 at 19:10
ThreadID: 46628 Views:1463 Replies:5 FollowUps:21
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Hi everyone,
For a while now I have suspected my Jacks speedo was reading slow even though it has the standard 245/70 on it. On a recent short trip I set the cruise to 105 in a 100 zone and was passing everyone on the road. On checking with a gps I found the speedo 2ks slow at 100 and dead accurate at all other speeds.
Anyone with a Jack might pay you to get it checked . Because I do a lot of ks in a variety of vehicles I picked it up, but if you only drive the one vehicle you might not notice.
I have also been runing 95oct with good results on short trips of 5oks got 540ks to 69ls , this is mainly using cruise
Cheers Pete
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Reply By: Member - Stephen M (NSW) - Wednesday, Jun 13, 2007 at 20:04

Wednesday, Jun 13, 2007 at 20:04
Thats buggar all not really worth worrying about unless you live in Vic where they would book you for doing 63k in a 60 zone. Savage as down there. My wifes new toyota is out by 6klms have been to toyota about it and pretty well nothing they can do thats the way they are I was told but at least its the opposite. When doing 60 by the speedo your actually doing 54 so less chance of getting booked. Regards Steve M
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Follow Up By: madfisher - Wednesday, Jun 13, 2007 at 20:44

Wednesday, Jun 13, 2007 at 20:44
Yes Stephen my old 4runner speedo was very optimistic, 94 actual when showing 100. Problem is I normally sit on 110 which is fine in the runner but cuting it very fine in the jack. You are spot on about vic,
Cheers Mate
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Reply By: Sand Man (SA) - Wednesday, Jun 13, 2007 at 20:59

Wednesday, Jun 13, 2007 at 20:59
2 kph is as close as you are likely to get it Pete.

My Jack (99 SE) shows 2kph slow at all speeds when compared with the GPS.
I'm really happy with that. It gives that little bit of safety margin when going through a red light camera at or just over the legal limit.
Bill


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Follow Up By: madfisher - Wednesday, Jun 13, 2007 at 21:33

Wednesday, Jun 13, 2007 at 21:33
its the most accurate speedo I have encountered, reading slow is the worry as most speedo are optimistic which gives you a safty cushion. oh well I will set the cruise for 105 not 110
cheers Pete
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Follow Up By: Michael ( Moss Vale NSW) - Wednesday, Jun 13, 2007 at 23:00

Wednesday, Jun 13, 2007 at 23:00
Sandman!!! I didnt think speed was a problem when you go through RED LIGHT CAMERA's!!! :0)
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Follow Up By: Pajman Pete (SA) - Thursday, Jun 14, 2007 at 09:00

Thursday, Jun 14, 2007 at 09:00
Michael,

Most of the red light cameras in SA are also speed cameras so than can catch you either way.

Cheers

Pete
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Follow Up By: Michael ( Moss Vale NSW) - Thursday, Jun 14, 2007 at 13:19

Thursday, Jun 14, 2007 at 13:19
Hi Pete, OK !! didnt know that, we dont have that here.....YET!!! regards Michael
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Follow Up By: Member - Stephen M (NSW) - Thursday, Jun 14, 2007 at 20:23

Thursday, Jun 14, 2007 at 20:23
Hi there Michael, not sure if you remember them trying the red light camera's and speed camera all in one but the camera's were taking pictures of moving trees and buses doing 160klms an hour up hills etc. They soon got rid of the two and just have the red light camera on its own. But as you said give it time they will get it wright and we will end up with them also. regards Steve M
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Follow Up By: Pajman Pete (SA) - Thursday, Jun 14, 2007 at 21:15

Thursday, Jun 14, 2007 at 21:15
They have them in SA at most intersections covered by cameras. No more speeding up to beat the red light - they will get you for the speed.

I have not been caught by one yet, but I have seen a few people flashed on a green light when they were going too fast.

Cheers

Pete
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Reply By: Aandy(WA) - Wednesday, Jun 13, 2007 at 22:01

Wednesday, Jun 13, 2007 at 22:01
madfisher you were passing everyone on the road because you were the only one stupid enough to travel at more than the speed limit!! On your own admission you said you set the cruise at 105 - most people don't do that. On the question of fuel use - 12.7l/100 is not great for a small 4wd. It's OK but not remarkable I guess for petrol. Diesel is the only way to go though for the larger vehicles.
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Follow Up By: madfisher - Thursday, Jun 14, 2007 at 13:18

Thursday, Jun 14, 2007 at 13:18
Mate you havent been to NSW for a while, everyone over here sits on 110. If you try and do 100 you are holding trucks up. I do 2000ks a week and have been booked twice in 37 years . But I drive to the road conditions.
Cheers Pete
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Follow Up By: Gerhardp1 - Thursday, Jun 14, 2007 at 13:20

Thursday, Jun 14, 2007 at 13:20
I wouldn't describe the Jack as a small 4wd, it's a medium in anyones language.

12.7l/100 is exceptionally good for a Jackaroo 3.5V6, and for any other medium 3.odd litre petrol V6.
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Follow Up By: madfisher - Thursday, Jun 14, 2007 at 18:46

Thursday, Jun 14, 2007 at 18:46
Jacks are about the the weight as a 60 series, and if I remember correctly have more interior room than a 80 series. The above fuel fig was obtained on short trips of 50ks. My 4 cyulinder 4runner only averages between 11.5 and 12.5 and burns more fuel towing the boat.
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Follow Up By: Member - Barry M (NSW) - Saturday, Jun 16, 2007 at 13:33

Saturday, Jun 16, 2007 at 13:33
Must also take exception to your theory that Jack is a small 4wd. More interior
space than Pootrol or 80 series I'm lead to believe. Anyone getting around 12 k/100 will be happy with their 3.5 V6, as I am with mine. I get that regularly,
& just did 13000k outback towing a C/t averaged 6.7 k to a litre (14.9L/100).
Jacks forever say I, did I mention its auto.....oldbaz
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Follow Up By: AndrewX - Sunday, Jun 17, 2007 at 23:39

Sunday, Jun 17, 2007 at 23:39
A Jackaroo must be counted as a small 4wd unless you include vehicles like the Honda etc which aren't really 4wds. If you go into real 4wd country and don't just potter around the burbs, you'll find a signifant predominance of diesel Cruisers, followed by diesel Patrols. They are the serious vehicles. A Jack is a variant on the Commodore being from the same stable and is thus commonly found in suburbia. The Holden Suburban is another such vehicle and its name reflects its use.
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Follow Up By: AndrewX - Monday, Jun 18, 2007 at 00:14

Monday, Jun 18, 2007 at 00:14
Blimey Barry 12k/100litres is really sucking it up. Of course fuel consumption figures depend so heavily on driving style, road and weather conditions and most importantly on the ability of the driver to calculate correctly. By way of example I retell this story. A close friend claimed he regularly got just over 9l/100k from his vehicle. I have the same vehicle and regularly get 11l/100k. On a trip we refuelled at the same time after 605k. I used 68l which gave me a figure of 11.23l/100k. When I told him my figure, he scoffed and proudly announced that he only used 9.3l/100k. When I asked how much fuel he had used he had taken 65l. He had therefore used a little less than me BUT he had divided his distance by the litres ... 605/65 which indeed gave 9.3 which is 9.3k/l. When calculated correctly the figures change somewhat!!! 65l divided by 6.05(hundreds) gives a figure of 10.74l/100k. I personally think he didn't fill his tank as full as I did mine because my vehicle is definitely more economical than his. The moral of my little story is - Don't take other peoples fuel consumption figures too seriously if they are better than yours. They'll almost certainly be lying or incompetent!!
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Follow Up By: Gerhardp1 - Monday, Jun 18, 2007 at 09:05

Monday, Jun 18, 2007 at 09:05
It's hardly worth responding to a comment that a Jack is a variant of a Commodore, or comparable to a CRV.

It indicates a severe lack of knowledge. To help you straighten out your warped view, read madfisher's post again - it's only a couple up from here. Perhaps you should actually look at a CRV and then look at a Jackaroo, even you will spot subtle differences between the two, such as the size, the huge diffs front and rear, the transfer case, the tyre size, the luggage space.

But I must be the idiot here - for 15 years I've been driving Jackaroos, and all that time they've really been Commodores.

But wait - I must be a genius, the only person on earth who has driven a Commodore to Cape York via the OTL, and the only Commodore to make it up Blue Rag Track, Billy Goats Bluff, Steep Track, etc, etc

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Follow Up By: madfisher - Monday, Jun 18, 2007 at 11:00

Monday, Jun 18, 2007 at 11:00
LOL LOL LOL LOL LOL, is this guy for real, funniest thing I have heard for years.
Reminds me of an old saying, (better to keep your mouth shut than open and prove to everyone how smart yopu are) Better stick to something you know something about mate. By the way we have owned 8 4bys so know a bit about them.
I know a track in the snowies and the only vehicle I have ever climbed it with was a swb 91 jack, now that may have qualified as a small vehicle. And i have owned a lj80 suz, fj40 cruiser, 2 rockies, 2 Jacks a 4runner and a Paj
Cheers Pere
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Follow Up By: Member - Barry M (NSW) - Monday, Jun 18, 2007 at 16:10

Monday, Jun 18, 2007 at 16:10
Andrew, I would be pleased to hear which 4wd wagon, petrol auto, V6 weighing
around 2 ton will give significantly better consumption than 12l/100 ? I will buy one. To set the record straight..the only thing "Holden" about a Jack are the
badges. The rest is pure Isuzu. To suggest that you need a diesel Cruiser or Patrol
to go into "real outback country" is to draw a long bow. Predominance? Maybe.
Essential ? Of course not. A Jack will take me anywhere I wish to take it just as well as a Cruiser or Patrol. Petrol or diesel is of no consequence. I have just returned from 13000k 's in the "outback" to prove it.
Lastly, I have no reason to believe those who report their fuel consumption
figures on this site are either lying or incompetent, & to suggest that does little to
enhance your credibility..Cheers....oldbaz.
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Follow Up By: madfisher - Monday, Jun 18, 2007 at 17:31

Monday, Jun 18, 2007 at 17:31
By this logic the bosses 100 series must be a corrola, and the silly buggar has been towing horses with it, lol
Cheers Pete
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Follow Up By: madfisher - Monday, Jun 18, 2007 at 17:46

Monday, Jun 18, 2007 at 17:46
Andrew in all seriousness now, Jacks are related to isuzu trucks, which are the biggest seller of trucks out of japan. You are geting 1.5 l per 100 better than my Jack, wacky doo. you have to change your oil twice as often, you stink after refueling(I have to do it at work) . You have a very narrow power band , most liky about 1500rpm. When you get dirty fuel you could be up for injectors and a fuel pump, could well run into ten grand on some diesels, if you blow a hole in a piston or do the turbo in , well lets just say I hope the sale of your house will cover it.
All this to save $2.00 per 100ks , but I must say you have made my day still laughing at my Jackadore.
Pete
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Follow Up By: Mick - Wednesday, Jun 20, 2007 at 20:18

Wednesday, Jun 20, 2007 at 20:18
Boy did you lot ever get reeled in by him!!!
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Reply By: Gerhardp1 - Thursday, Jun 14, 2007 at 10:36

Thursday, Jun 14, 2007 at 10:36
I can't figure out your logic. You say your Jack's speedo is accurate at all speeds but 2k out at 100.

Why is that a problem, and why would that be a reason for other Jack owners to get theirs checked?

My Jack speedo is the same - probably the most accurate of any car on the road, but I see that as a good thing.......
AnswerID: 246733

Follow Up By: madfisher - Thursday, Jun 14, 2007 at 13:13

Thursday, Jun 14, 2007 at 13:13
your right it is a good thing, once you are aware oif it.Most speedos are optimistic especially toyotas and most people are aware of this and allow a bit extra except for the poor motorist in Vic who are held to ransom by the vic goverment.
I was merely raising the issue to make Jack owners aware. This is the first car I have owned that has a accurate speedo
Cheers Pete
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Reply By: Member - Barry M (NSW) - Saturday, Jun 16, 2007 at 13:24

Saturday, Jun 16, 2007 at 13:24
I cant see your speedo figures being unusual. You may be interested to know my
3.5 v6 Jack will use 28% less fuel at 100 kph than at 110 kph, towing a light off
road camper trailer. That is 14.2 as opposed to 18.1 L/100K. I found that very
acceptable & dropped the 10 k immediately. Towing anything above 100 k is
probably not a good thing anyway. Your figures on 95 oct sound ok to me.
Mines an auto .....oldbaz.
AnswerID: 247217

Follow Up By: madfisher - Saturday, Jun 16, 2007 at 16:03

Saturday, Jun 16, 2007 at 16:03
Thanks for the info Barry, mine is a man with hankook suvs which are a pretty tame At. I take great delight in my fuel fig as heaps of people told me I would be lucky to get 400ks to a tank.
Your fuel fig is better than my wifes nh 3lt Paj with a canoe on the roof(15/100) though see has got 10rs on hers.
I usually sit on 95 to 100kph when towing, but the Jack makes such ligfht work of it it tends to get away on me even towing. Because my 4runners speedo was so optismistic I use to sit the speedo on 105 to do about 98, thats why I could have got caught out in the Jack.
I have only had it a couple of months and I love IT.
Cheers Pete
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