Harrisonmonteiro

Hi everyone. Hope you all are doing well. I've got a 2013 y62 se that I've developed a love and hate relation with over the last 2 years. Love the ride on and off the road, love the stance and the road presence. Love that it's a 1 stop solution for both offroading and overlanding. But hate the fact it's like a needy girlfriend also having tantrums, and has crazy drinking habits. Ive thought of getting rid of it several times and getting something more efficient. But i havent found an alternative as yet other than the lc200 which i honestly am not the biggest fan of. Plus I've already spent a decent chunk of money in it, that I'd lose alot if I'd go to sell it now. So lately I've been having some weird problem with the car mechanically that no one is able to diagnose. 1. rarely but prominently, the patrol misfires, I panic because 99% of the time is when I am doing a road trip outside the country. I end up halting the car for a bit, let everything cool down and I check the connection to the MAF and top up the water in the reserve radiator tank and I am good to go. But I don't know what's rhe problem or the solution. While it misfires, it can't hold the idle, so it tends to shut unless I maintain a slightly higher rpm. At times while I am cruising it will misfires, that time it's like the complete powered gets cut and returns back in a second. 2. Every so often, the radiator water depletes. The mechanic has checked for leaks in the radiator, but everything is fine. Has checked for leaks in the line but couldn't find anything. Has checked if there is water mixing with engine oil but that also came out clear. Now the mechanic says there are 2 pipes going into the car for the air conditioning system. He says it could be that. He wants to disconnect that and suggests that this will solve the problem. I haven't taken it to the garage yet. 3. The vehicle has clocked 330k km. But has never had any oil change other than the standard engine oil change. So let's say, I've never changed the gear transmission front and back diff fluid ever. Until now it behaves decent. But I often go on long trips out of the country and I am always anxious about breakdowns. What do you think I need to do. 4. Never did any major service like timing chain or any engine work. So not sure what I need to check. But the car sounds alright The above are the mechanical issues I have with my car. This year I am thinking of biting the bullet and working on maintaining the car for the next season. What do you'll recommend I do and where do I start. To add to that there are following things I wish to do. 1. Add front and rear bumper (steel, rear with tire carrier and jerry can holder) 2. Redo the interior of the vehicle as its beige and horribly dirty, it's more or less destroyed. Thinking of putting the box storage seat as the base for the rear seats and having the back rests from the y61. I'd appreciate alternative suggestions. As I would like to create more storage space. 3. Maybe change the audio system, to a better one as the stock unit is bad. I upgraded the speakers but the head unit is horrible. 4. Maybe add an exhaust as I have a UGR intake and I feel there is back pressure even after tuning. 5. Add a snorkle (it looks good. Not sure if I need it) 6. Long ranger fuel tank (still wondering if i should, because if I do, then probably I would never be able to dunes bash again) I apologise for such a long query. But thanks in advance for the responses