Help before I go insane!!!

[MickG]

VEHICLE TECHNICAL DETAILS
- 1999 Series 2 manual TD5 Discovery
- 117500 Klms
- Fitted with Bruce Davis Remapped ECU
- Apparently showing zero faults when plugged into computer

PROBLEM
Engine is continuing to rev up slightly when changing up gears and is generally a bit rough on the gear changes with a lot of lurching when I come off accelerator and on then back on. The whole car does not seem to be running as smooth as it sometime does.
This is an intermitent problem and only seems to happen occasionaly. Of course it never happens when I take it to the garage (Garage who services only Land Rover). Has been to the garage for this problem 3 times now. Last time it came out nice and smooth again and I thought this was it sorted but, unfortunately it has re-appeared.

Not very technically minded myself and am reaching the stage where I just want to get rid of it and buy something else as it requires so much concentration to try and make it drive smooth!!! Would really like ANY input at all as the last thing I want to do is sell it but, it's getting that annoying. If anyone has any ideas or thoughts I would really like to hear from you.

Cheers, Mick

[Greylandy]

How long have you had the Bruce Davis remapped ECU?

That would be the first thing to check .. if possible go back to standard ecu, drive it for a while and see if that makes a difference.

[discowhite]

do you have a speedo correction unit fitted???
if so they can play with the electrics if not fitted correctly

[MickG]

Thanks for responding Greylandy

Had the ECU fitted February this year and to begin with, no problems. It's really only been in the last few months that it has been a bit rough. As I don't have a standard ECU to try, I am having to rely on Rick of Rick's 4X4 Gold Coast to figure it out - very good crowd there by the way and Rick has gone out of his way to try and recify this problem. Anyway it is going back in there this week for another attempt to fix it but the general feeling is, if it is imtermitent, then it shouldn't be the ECU.

It's made more frustrating by the fact that I have zero mechanical experience so really have to rely on others to find and fix any problems.

Cheers for the input though and hopefully someone might shed some light on this annoying anomoly soon!!

Mick

[MickG]

Originally posted by discowhite
do you have a speedo correction unit fitted???
if so they can play with the electrics if not fitted correctly

No speedo correction unit fitted Discowhite. Stock electrics apart from the ECU.

Cheers

[shaunp]

May be worth having a Talk to someone in Brisbane like Warren and the boys at M.R. Automotive or Shane at Technobritsh.

[DEFENDERZOOK]

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[LandyAndy]

Hi Guys
Didnt somebody have the same problem recently with a TD5 Defender????????
Could be worth a search.
Andrew

[MickG]

Originally posted by LandyAndy
Hi Guys
Didnt somebody have the same problem recently with a TD5 Defender????????
Could be worth a search.

Hi Andrew

Someone did have a surging problem with a Defender, but mine is a problem whem changing gear only and drives fine when cruising. I did try and get some info from that thread at the same time but to no avail.

Once it comes out of the garage this weekend, if it's not fixed i'm selling it. So if anyone out there knows what they're doing, then they might be able to pick up a well kitted out Disco for a good price come Monday morning....i'll keep the forum posted.

Cheers

[Biggle]

Sounds like sticking in the throttle body, so when u clutch in and de throttle, throttle butterfly thingy is not releasing, causing revs to increase. I'm sure workshop would have picked this up, but worth a look.

[MickG]

Originally posted by Biggle
Sounds like sticking in the throttle body, so when u clutch in and de throttle, throttle butterfly thingy is not releasing, causing revs to increase. I'm sure workshop would have picked this up, but worth a look.

That sounds like a very likely cause as it certainly does feel like something sticking and as the problem is intermitent this could easily account for it........i'll be sure to mention it to the mechanic.

Thanks for the input, really appreciate it.

Mick

[seqfisho]

Hey MickG,

I know its frustrating but dont give up so easily, you will kick yourself if you sell it, especially as it isnt that huge a problem, its not like its a lemon.

My plan of attack would be to take it back to who put the remapped chip in and get them to return it to normal thus eliminating the posibility of it causing some issues, then go to a LR expert like M+R Autos that have plenty of experience and see what they can find.

It really cant be to much, and you would be better off persevering with it, and use it too get to know more about it mechanically so you will have a better understanding in the future. :wink:

And dont think that this sort of issue doesnt happen to other makes and is a Landrover only problem, I could tell you a tale or two about my BA Falcon company hack 8O

Glen

[PhilipA]

Er diesels do not have a throttle body.
But the posting before was about a ecu signal coming from a switch on the clutch pedal which cut off fuel on gear changes causing a flat spot on gear shift.
This sounds like your problem but in the opposite direction.
regards Philip A

[MickG]

Originally posted by seqfisho
Hey MickG,

I know its frustrating but dont give up so easily, you will kick yourself if you sell it, especially as it isnt that huge a problem, its not like its a lemon.

Glen

Hi Glen

I am VERY reluctant to sell it but I tell you, it has been driving me mad for some weeks now. I am still confident that the guy looking into it knows what he is doing (he also put in the ECU), but if he can't rectify it after this attempt, then i'll look at getting someone else to look at it.

Where are M+R Autos? Being failry new to Land Rovers and 4x4 and having been bitten badly by the modifications bug, a list of good LR mechanics and modifiers near by would make me very happy. Yellow pages only tells you so much but as most would agree, someone who knows LR's is my preference.

Really appreciate all the input and will hopefully be back driving with a LR smile in no time. Has also meant I have put a halt to any new mods until this is fixed - no point spending $ doing stuff if it doesn't drive like it should.

Cheers and will keep you posted.

[seqfisho]

Stick with it son :wink:


M+R Auto's is in Redcliffe, a bit of a hike for you but maybe a call to talk to Warren first wouldnt go astray, you'l find them in the preffered suppliers section.


Glen

[loanrangie]

Could be the fly by wire accelerator playing up. I thought modern efi common rail diesels had a t/body? How is air regulated then ?
I would return it to who ever fitted the remapped ecu and demand to either fit the standard one back or fix it .

[PhilipA]

AFAIK they have a MAF but no throttle . Regulation is like any diesel . The duration, volume injected by the injectors which is controlled by the pump or by the ECU on a common rail. ( or like the latest BMW petrol engines)
Lean =idle, rich = power, plus black smoke, Koff Koff.
That is a major reason diesels are more economical, no pumping losses trying to pull air through a closed throttle.
Regards Philip A

[MickG]

If anyone is interested, I think my problem has been solved by the mechanics. Turns out it was an EGR filter that had mud stuck in it and therefore hindered airflow. EGR filter has been replaced and it all seems fine again - until the next mud bog I go through probably!!!

Anyway thanks for all the tips and advice.

[seqfisho]

Good On Ya Mick,

Glad to see that it is fixed and wasn't anything major :wink:


Glen