OBD II Scanner - 4.0 running rough

[Hardy]

It's a joke.
You can buy a hand held OBD II scanner for $65 off eBay, delivered from China in 10 days.
In the US, walk into any auto store on a Saturday and pick up an OBD scanner, similar price.

Australia? What's OBD?

Can anyone offer any advice on how or where to buy one? - cheap hand held or PC interface w/ software.

Only searched online so far - ENGTEK have an interface for $220 but can't call them until Monday.

My '99 4.0 has been off the road since Tuesday with bad misfire/rough running/lack of power but starts first pop with steady idle (apart from misfire)
No errors on dash. I have NO access to e-diagnostics, as I refuse to allow the LR gimps to assess problem using my e-wallet / their TEST'cheque'BOOK.
Have already changed spark plugs (some gaps out to 1.65mm) changed all 8 leads (one tip/boot corroded) but no difference. Cleaned out IAC valve (slightly clogged) checked physical connections for TP, CKP and K sensors. My first reaction was the fuel filter, but it is located inside the tank with no access hatch and I have about 85 litres on board.
With all these sensors on board and the available fault codes, surely an OBD scanner will help me elimate things that are not causing the problem. I would hate to remove a full fuel tank for no reason and still be left without a clue.

Thanks,
Hardy

[justinC]

Hardy,

My prediction is that you have an air flow meter fault, as these symptoms suggest.

This is a common problem and most dealers have them in stock at all times because of it! They even run out of them due to demand.

You will also find that most times the fault won't show up on diagnostics anyway , as the AF meter readings probably aren't so far out of range to cause an error message. The last two I've replaced showed no sign of fault codes, only that the real time display of air mass was down around 12 to 18 Kg/ Hr instead of about 25 Kg/Hr at idle, and on sharp throttle application, should read over 300.

Try substituting from a known working example to test.

JC

[walker]

Yep, sounds like a MAF sensor problem, I have been through 4 of them in the past 15months, luck I'm still under warranty.

As for OBD, a mate bought this recently
http://www.scangauge.com/

It works well and picks up all the fault codes and can clear them + it works as a trip computer. Only works on the V8 LR motor not the TD5.

[RangingRover]

another for an air flow meter fault here - perhaps if you know someone with a 4 litre you can swap AFMs temporarily, and see if it runs better.

[Hardy]

Geez you blokes are bloody cluey.

Thanks to your suggestions, I do beleive I've sorted the problem.
Not having a scan tool, I just disconnected each component/sensor one at a time to see what the differance was.
Disconnecting the MAF sensor entirely allowed the engine to idle and rev smoothly, although I haven't driven it yet.


Ironically everything I replaced/rebuilt was half stuffed anyway - spark plugs, leads, 1x knock sensor, dirty IAC valve. Good learning experience too, understanding the role of each EMS component and the back-up strategies for sensor failure.
Thank eff I didn't pull the fuel tank out, would have total waste of time.

Hardy

[oldzook]

It's a joke.
You can buy a hand held OBD II scanner for $65 off eBay, delivered from China in 10 days.
*************
Can anyone offer any advice on how or where to buy one? - cheap hand held or PC interface w/ software.
*************
Thanks,
Hardy

anybody bought a chinese scanner off ebay? do they work? are they compatible with a disco1?
i'm looking at somethin like these

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... %3AIT&rd=1

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... %3AIT&rd=1

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... %3AIT&rd=1

cheers
Dan

[stuee]

Yep, sounds like a MAF sensor problem, I have been through 4 of them in the past 15months, luck I'm still under warranty.

As for OBD, a mate bought this recently
http://www.scangauge.com/

It works well and picks up all the fault codes and can clear them + it works as a trip computer. Only works on the V8 LR motor not the TD5.

What model is year is your mates disco. This is the first I've heard of personal obd scanners so I'm looking into it now so I can fix my own problems. Does anyone know where to obtain a list of what each of the fault codes represent. My particular vehicle is a 97 v8 disco if thats relevant.

Do you also know what he paid for his, the site currently just lists them as sold out under the "Price" page.

Cheers
Stuart

[stuee]

It's a joke.
You can buy a hand held OBD II scanner for $65 off eBay, delivered from China in 10 days.
*************
Can anyone offer any advice on how or where to buy one? - cheap hand held or PC interface w/ software.
*************
Thanks,
Hardy

anybody bought a chinese scanner off ebay? do they work? are they compatible with a disco1?
i'm looking at somethin like these

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... %3AIT&rd=1

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... %3AIT&rd=1

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... %3AIT&rd=1

cheers
Dan

I was just doing a bit of research then on OBD II and most cars post '96 should have it, some later models now have CAN OBD II. Although there are about three (could be more) different protcols used (GM, ford and chrysler I think it said all use different ones). I am yet to find out what rover use but I think the scangauge mentioned above would work with all of them from what I gather.

[Wooders]

Sorry to drag up an old thread.
We ae the importers of the ScanGauge - and I'd actually be curious to know if they can work on the Rovers as I am slowly compiling a alist of compatabile vehicles (it's a large combo of make/model/engine/year variations asa you could imagine).....
Anyhow just mention it cause if someone if looking for this sort of tool we'd like to talk as I'm after info too.

<sorry spam off>

[The Master]

Cost for one of these in Australia?

It is an OBD-II scanner right?

Cheers,

Carl

[Wooders]

Yes it is an ODB-II scanner (and allow the codes to be reset). Plus it works as a trip computer etc as well.
The retail price is on our website (my sig) - but will offer a discount in leu of compatability info

[The Master]

I'm interested.

PM price for delivery to Brisbane.

Have been busy with my 5 week old tomorrow baby girl.

Cheers,

Carl

[KiwiBacon]

As for OBD, a mate bought this recently
http://www.scangauge.com/

I bought one recently too.
But my car is too old and dumb to work with it, my 4wd is a mechanical diesel.

If anyone wants to buy it, let me know.

[jbell]

kiwibacon can you pm me with the price

thanks Jeff