Problems with chipped TD5 killing me!!!! PLEASE HELP

[dhumphri]

I continue to have problems with my chipped Defender. Was driving to work today and intermittantly the vehilce at full throttle just had no power and limited boost particularly when engine accelerating rapidly.

It seemed strangled at full throttle as if there was not enough fuel feeding the engine.

The problem is not with the computer as this has been changed 3 times now. Following has also been done:
1. Intercooler pipes checked for delamination.
2. Engine wiring harness under cam cover replaced.
3. Main engine harness partially stipped back near gearbox and checked for oil - NONE.
4. ECU is not producing ANY codes at all, it is clean.

Please guys help me out. It has been suggested to me that the fuel pump is getting old in the tooth and not providing enough pressure/volume to feed the injectors - the problem gets worse the longer I drive the car, seems OK for first 15-20 min drive and then progressively gets worse.

Please chip in with any ideas/suggestions. Many thks Daz
The truck also has the larger intercooler.

[abaddonxi]

I'll ask the obvious ones.

Fuel filter? Dirt and stuff blocking the intercooler? Wastegate thingy? Lift pump diaphragm leaking air into system? Sedimenter?

hth

Cheers
Simon

[dhumphri]

Hey Simon
I replaced the fuel filter approx 4 weeks ago, have not pulled the intercooler out yet to flush, the waste gate has been adjusted by Bruce Davis and the boost sensor replaced as it was showing a fault, so the vehicle is not overboosting.

Dont know how to check the lift pump diaphram or sedimenter???

Daz

[dhumphri]

By the looks the TD5 does not have either a lift pump or a sedimenter(according to details on the Rave CD).

[Redback]

What model TD5 and is it a BDavis chip :?:

[Tusker]

They don't have a main fuel pump either, its all done by the injectors.

As I recall your car you wouldn't need full throttle very often!

Have you checked for blockage on the inlet side? Air filter collapsed, something in the snorkel?

Regards
Max P

[dhumphri]

Redback it is an early 2001 and it is the BDavis chip and intercooler. I have the ECU(chip) that needs to be swapped out - cant upload codes to it.

[dhumphri]

How you going Tusker - have not checked the snorkel for blockages, will do tonight. The air filter is a little dirty but by no means collapsed.

I dont have the original chip that Corey ran in the vehicle, I wanted to upgrade it as the power came on very suddenly and it have no go below 2000 RPM.

Bruce upgraded it to the standard 140Kw map and it has has at least 3 of these ECU's put in it - all with the same result - poor performance after driving the vehicle for a period of time????

[Redback]

You may have to go back to the original chip (ECU SWAP) if this chip/intercooler doesn't work, from memory greylandy had the same problem in his 2002 model def.

Speak to Bruce, he should be trying to fix it, and of cause for free, as he has done for me when a chip doesn't do what it's supposed too.

Baz.

[BigJon]

Does the throttle pedal check out as being OK?

[Tusker]

It certainly didn't play up like this in Corey's time that I'm aware of.

Only other thing I can guess at is theres a faulty sensor somewhere, causing it to go into limp mode intermittently. I don't know where they are or what they look like, but its possible the ecu is getting a false oil or water input. Maybe throttle pedal, who knows.

Keep us informed!

Regards
Max P

[DEFENDERZOOK]

<span style="color:blue">can you borrow a crank angle sensor to test out.....
it may test ok with multi meters but play up intermittently.....


and to test the throttle pedal...you need to attach your ohms meter
and slowly press the throttle pedal to the floor and back
and check to see if you have a steady increase and decrease in resistance
without any sudden spikes.......

whatever it is thats playing up needs to heat up before it causes trouble....</span>

[Robbo]

You say that the ECU has been changed a few times, this can be a problem in itself. Removing the plugs off the ECU can make the tabs on the Lugs of the red and black connectors to loose there contact strength. This can lead to intermittent faults. If you look inside each lug you will see they have a little flap that is suppose to push against the ECU terminal. These flaps or tabs can lay back, if this has happened each wire needs to be removed and the tabs bent back with a pin or similar. It's not easy to explain but these sorts of problems are usually something you have disturbed and this is a common problem in the electrical industry.

[abaddonxi]

Oops, sorry, that should be - blown water in fuel light?

Cheers
Simon

[tombraider]

I'd try checking EGR not jammed open...
Wastegate not jammed either open or shut (I'm betting open)

Cheers
Mike

[stevo]

fuel pressure may be dropping off need a pressure guage connected at the fuel regulator and go for a drive, there is no fault code for this problem,also check the small hose that goes to the pressure switch that controls the waste gate the hose may have a crack in it that opens up with heat.

These sort of problems can be a right pain in the butt to find and it may come down to trying different things,a faulty sensor should cause a fault to be logged maybe try and disconnect a sensor when the engine is cold and see if this brings on the same symptons.

Good Luck

[dhumphri]

Thanks for all the suggestions guys, sorry I did not reply earlier but I just finished swapping out the power steering pump which also sh&^t itself in the last week or so.

Am buggered - taking the car back to Bruce later this week - will make a list of all suggestions and run through them one by one.

Will update if and when I find anything.

Many thanks
Daz

[noddy]

Hmmmm....this sounds familar.

I have had similar problems over a period of 12-18 months. Who is telling you that it is not throwing any ECU errors?

Have they backed the boost off? What boost are you running?

Otherwise; a dicky:
Crank angle sensor?
MAP sensor?
MAF sensor?

I will put money on that it is going into a limp mode. When it happens next, stop, turn off the engine and let the ECU reset itself, does it then go straight back into limp mode or only after you load-up the engine? This will quickly rule out any filter/intercooler piping issues.

Let us no how you get on.

Regards

PS -- one last question. Are you getting any surging or an unresponsive throttle in low range?

[Greylandy]

Get rid of it ... go back to a standard ECU and live happily ever after ..... &#33;&#33; Better to drive a slow landy than an unreliable one ....


Soap box now vacant ... https://www.aulro.com/afvb/

[shepstar]

I had a similiar problem with my TD5 Defender and all it was is the circlip that holds the arm onto the wastegate on the turbo had fallen off, hence wastegate flaps around. It wasn&#39;t till the second time that I had looked at the waste gate that I found the problem. The first time I just stuck my hand under and wiggled the arm, no movement so I assumed ok. The second time I stuck my head under to see arm just sitting on the end of wastegate actuator- no circlip. Finding right size circlip/eclip that fits properly is fun. Turbo heat shield is easy to remove if this is the problem.

Drew

[dhumphri]

Got a little bit more info guys. Took the truck to Graeme Coopers and the EGR is rooted which may be causing some of the issues. Ward tells me that the EGR can cause some really wierd symptoms and these seem to be different from vehicle to vehicle.

As a matter of precaution and because I found a light misting of oil at the red ECU plug I have ordered a new engine wiring harness.

Get this boys - LR Australia charge &#036;1600.00 for one of these. I have located same part in UK for &#036;155.00 pound which is about &#036;370.00.

How can they change so much bloody money for the same part???

Ordered the part from: www.famousfour.co.uk

I do agree to some extent GreyLandy but on the couple of occasions that the car has been &#39;on song&#39; it has driven just beautifully. If this latest effort fails I might have to give up...

[George130]

Lets hope this works then. The chip is awsome.