When I picked up this vehicle, I hadnt bargained for this turning out to be a sort of mini-restoration project.
However it does seem like the previous owner was inordinately bothered about cosmetics and external + internal enhancements than he was with the drive train.
As a result I have spent several weekends at the garage, reverse-engineering several issues. Primary issues were 'a lot of smoke', 'heavy fuel consumption - probably 3 per litre', 'noisy engine' etc.
We finally turned to the dealership/agency as nobody outside had the software or the connectors to read these engines (they arent ODB compliant). Met a genial old sardarji there who is their service manager/supervisor, explained the problems to him and immediately felt comfortable as the guy had a calm look on his face as he tapped his fingers on the fender while looking in.
They took 7 days at the agency - the vehicle showed nothing on the computer, which meant that the connector was loose/badly wired. Once this was done, several fault codes came up showing no input from the following sensors:
1. Lambda (O2) (2 nos)
2. MAF
3. Stepper motor (TDC)
4. Gearbox
5. Transfer case
6. Thermostat
7. Engine tune
In other words - NONE of the sensors were providing any input to the ECU.
They then proceeded to rewire all the sensors to find out which one is kaput, but there were no fault codes after rewiring. Everything worked - all it required was a connection !
Magically all the engine-related issues went away with that (overheating, fuel consumption) and I'm now getting about 5-6 kmpl. The throttle butterfuly mount also had a leak, which lead to the irregular idle (leak was AFTER the MAF).
We have also finished all peripheral issues, got new (replacement) headers, put in a Discovery end-can and the brute is finally giving out a nice steady and muted growl.
This has been a huge learning experience for me - thankfully not too expensive as most of our replacements came from the Land Rover scrap yard (except sensitive stuff). It wasnt expensive, but it was time-consuming as most of it was reverse engineering - old engines arent expensive to maintain, they require TIME. Total expense on all engine related stuff was less than Dhs.2.5k (Rs.30k+)
Still, it was a lot of quality time spent in the garage, after which I now have a mechanically close-to-perfect beast.
Now for the ICE!
PS: Despite all these issues, the vehicle went through a dozen punishing weekend desert trips without too many incidents except the overheating on one occassion.