Thread: washing your car makes it go better!

If you cannot get more than 2500 rpm before or after spraying you have got a problem. I'd be looking at the injector harness, maybe the throttle potentiometer. Does it appear to cut off as you get up to 2500 rpm? if so you might have a fuel starvation problem, in which case you should be looking at your filters and pump or an over boost problem. Cannot tell by your description.

definitely not injector harness - that's been replaced and made no difference. If I really put the foot down, it will get to 4000rpm without cutting out, but it certainly doesn't wind out freely beyond 2500rpm (and the fact that it runs rough when holding it at around 2000rpm in first may also be a clue). Apart from first gear it is super smooth to 2500rpm (the smoothest TD5 I've driven) and it gets good fuel economy (not being able to go over 2500rpm very well helps of course!). I had a generalist diesel mechanic check fuel supply, turbo boost, air leaks etc and all that was fine. Graeme Coopers were too busy to give it a thorough going over (I live in Canberra, so can't leave car with them for more than a day and don't trust any of the Canberra so-called LR specialists) - they cleared the fault codes and that was about it. I could start replacing sensors, but that's an expensive way to go without a firm diagnosis...

I had the problem before and after fitting TRS ECU, so that's not it either - still a barrier at 2500rpm, but I've now got more power on the way to 2500rpm!

pull your hoses and check them for delamination.

my opening thoughts would be the boost modulator unit on the turbo.

yep, after researching this site, I thought turbo boost modulator as well. I realise I probably could have tested this by bypassing it, but for the sake of $50 I just bought a new one...unfortunately made no difference! And unfortunately the hoses are fine too.

A friend sussed it out with his new Nanocom, and while he might not have been across all the Nanocom functionality at the time, couldn't find anything obvious. A truly bizarre and frustrating problem as I suspect it will go like the powers of p*ss if I can get it to rev out to 4000rpm freely, given that Graeme Coopers were surprised by the high power output on the dyno.

Guessing here but I would clean and tighten all the earth points at the front of the car. Maybe you made a better earth with the steam cleaning and the problem is that the ECU or some other electronic control gizmo is not properly earthed so you are getting the poor running? 1999 would give 10 years for loose connections/corrosion to stuff up a fair number of earth connections and it is the only thing I can thing of that would possibly be affected by your front-end steam clean...

Originally Posted by Panya

Guessing here but I would clean and tighten all the earth points at the front of the car. Maybe you made a better earth with the steam cleaning and the problem is that the ECU or some other electronic control gizmo is not properly earthed so you are getting the poor running? 1999 would give 10 years for loose connections/corrosion to stuff up a fair number of earth connections and it is the only thing I can thing of that would possibly be affected by your front-end steam clean...

Good suggestion - I would run a new chassis/engine earth link and see if that improves matters, but check all other earths you can find, wherever anything to do with the engine is earthed.

John

Hi feraldisco

I also have a td5 of the same yr, I noticed the exact same scenario with mine some time back. I have done the Inj loom as this was a big problem, and I think that it has gotten rid of this issue, but I wolud be really keen to find out what it was at the time so I could check mine as well.

cheers bronson

hy guys how high should it rev ?? my 2001 td5 man only gets to 3000rpm and then feels like it becomes a little doughy not that i very keen on reving it past 3000rpm anyhow its all standard to i will add