I’m betting overboost under the extra load.
I'm really not sure! The only thing I can think of is as you've said, that the fuel pump is on its last legs as that can be very similar in how it is reacting, but exacerbated under load. For me, LandRover and VDO fuel pumps seem to do approx 120,000km before they fail.
Edit: The TPS is 5v, I don't think the trailer is effecting that.
Cheers
Slunnie
~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
I’m betting overboost under the extra load.
Notes on the file attached, to help:
- Turbo Boost reading suddenly goes to Zero, along with EGR Inlet%, EGR Mod% and Turbo Mod%, then they all start reading again together.
- EGR Mod does not show any numbers on this file although it did for two seconds at Zero road speed in another file, 10 and 18 readings
- Temp was increasing but it was being tested going up a steep road repeatedly, wondering if that's because no EGR cycling?
- I have checked for oil on the ECU plug, it's clean.
- New MAF and Turbo modulator and lines renewed.
- Waste gate serviced
- Have tried changing the length of turbo actuator arm, test file done with 16 threads showing, I wound it back in case it was an overboost, but didn't make much difference. 14 thread test was similar. Last service by agent it came back with 12 threads!
- Not seen any overboost errors logged.
- Fuel pump failed three years ago and was replaced with new one by LR agent, as was the fuel filter.
- Test for attached file done not towing to see if could replicate it that way, it did, but notice the results less as drive around below the level it goes to zero.
- It was overboosting and surging before the modulator was replaced, it does not do that now.
I can problem solve usually, even discovered why I couldn't post here for the last few days!
"Driver Demand Problem 1" Still appearing but not immediately, has to be driven for a bit. No other errors.
Any ideas on what I could look at next would be appreciated.
JayTee
Nullus Anxietus
Getting involved in discussions is the best way to learn.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
JayTee
Nullus Anxietus
Getting involved in discussions is the best way to learn.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
It is Overboosting, just mightn't be logging a fault.
Bypass the boost modulator (Run line from turbo outlet pipe straight to actuator) and take it for another run, this will tell you if the wastegate is sticking if it still faults.
Attach another file
It shouldn't fault with 16 threads showing and it will probably feel doughy when driving like this .
Looking at the AAP, it seems there would also be a bit of excessive restriction, even allowing for altitude, maybe a blocked filter but this is a separate issue.
Edit: James beat me to it again, but doing the bypass can also help point to faulty map
Edit 2: just had another look at the file, agree with James, map sensor most likely, they can fault in many ways and are all around 20 years old and over.
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