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O2 sensors look okay!

Thought I'd provide an update of the on-going issue. Battery was dead for a couple of days before I recharged it and towed my boat to the ramp to perform some trailer repairs. On the way to the ramp, the Rover towed like an absolute champ, no dramas at all. However, once it warmed up, it felt...

It's also probably worth mentioning that I don't think this down-on-power issue is actually related to the engine temperature as I first assumed. I think it ran well when cold because I also happened to change a dead battery when I changed the O2 sensors. So perhaps it wasn't becoming sluggish...

I've got the Thor engine. I think this is the one I want? https://www.4wdindustries.com.au/range-rover-p38-discovery-2-v8-water-coolant-tempe I'd be surprised if my coolant temp sensor was busted, it seems to return fairly sensible readings on my OBD reader. But for $40 I'm happy to give it a...

I just tried this and interestingly enough, unplugging the MAF seemed to make no difference. The idle was the same, and from my best judgement, the performance from a quick drive seemed the same. I would have expected a super rough idle with an unplugged MAF? Do I have a dud MAF then?

FWIW, the engine was rebuilt by some fairly reputable folk about 70,xxx kms ago. I didn’t reset the trip, however I did put my spare battery in because it was flat :vb-embarassed-laugh: which I believe resets the trip. I’ll attach the vehicle speeds of the trip and in the second image I’ve...

Turns out it does do recordings! Went for a pretty decent drive today. Apparently averaged around 15L/100km which is pretty good :0 Didn’t buy the car for fuel economy though, still felt sluggish.

Just did a bit of a test drive with the reader on. Long term fuel trim values seemed all over the place when I first turned the car on and it was getting to temp, like -1% 2% etc. Then it settled at around -6-7.5% I haven't tried unplugging the MAF, but some readings in neutral; Idle: 8g/sec...

Yeah it is in a plastic housing. I replaced it about 14 months ago. What's the thinking behind removing the thermostat?

Hello there! I've got a 2001 4.0 P38 and I noticed over the last few months (I don't drive very often) that the ole gal has been down on power, especially under load, last time towing my boat (Only about 1 tonne) was yikers. Turned out I had an O2 sensor error, so I replaced the both sensors...

I wouldn't say the top hose goes rock hard, it's firm, but I can still squeeze it a bit. Will look into the bubbles in coolant thing :) This is the 2nd radiator in 3 years or so, figured something else might be at play. I certainly hope the solution is just to buy a nice alloy rad and its not...

Sorry, deets are in my signature. 2001 P38 4.0L petrol. RMS = rear main seal.

It was almost this time last year that I replaced the radiator, viscous fan & coupling, thermostat, rad expansion tank cap and various hoses (because the old ones were fat). Things have been great, coolant never dropped, no overheating, I've been towing my boat around no dramas. Only thing I've...

Started recolouring my interior trim today. Sprayed the drivers side door black with vinyl paint. Looking much better than the boring dull factory grey :D:D Not looking forward to taking the dashboard apart to do that, though :rolleyes: can’t upload pictures due to permissions apparently :(

What speeds were you doing when it overheated? If you were going slow it could be the viscous fan. I’d be inclined to just replace it and the rad fan. It’s an easy one to do :)

Well after changing absolutely nothing I have all my power back :rolleyes: I suspect it was the battery. I got 12.4 volts on the battery when off, when I turn the key to 2nd position I was only getting 11.4 volts. I drove the car for about 20 minutes yesterday, perhaps the alternator charged...

Hello friends, After just fixing my overheating woes, I've been gifted a new problem. I seem to have no power to my air con, head-unit or cigarette lighter. They have all worked flawlessly since I've owned the car. I assume the overheating probably caused something here, the timing is very...

Hmm, I have an ‘01 P38 and my return hose drops around the battery. Perhaps I’m misunderstanding. In any case, I tried parking up the drivers side on a gutter and ran it for a bit. The coolant seems to be circulating again, I noticed some coolant dripping from the return hose and I think it was...

Ah ok. I thought I read a post somewhere about cranking hot air assists in burping coolant.

So I installed all the new things and it seems coolant isn’t circulating properly. I couldn’t see it coming back into the overflow tank. Well, I did see it initially, then it stopped. Also, I seem to have completely lost power to the HEVAC unit and radio which is just amazing :mad: So I wasn’t...