Good news, I love a happy ending.

Bank one is the side with the oil filler cap. Sounds like you've change the wrong one.

I would check over the whole crank vent system. These are known for failing leading to poor running. There are two pipes under the acoustic cover that dive down the. A I of the engine, if these feel spongy or soft replace the whole lot. It's a good idea to do the PCV valve at the same time and...

I think the rubber guide has come off

I wouldn't panic too much. Chances are it is the hose that goes across the back of the engine that's dripping onto the cast water rail. It a little awkward to get to but still a DIY job.

Excellent write up there by Saint. Its not a tricky job at all except the viscose fan nut. But if you have followed Saints guide and have made up your locking wrench its quite easy. I did mine this week and the only thing I would add is that the secondary air pipe doesnt have to come right of to...

Sounds like the dsp amp to me. its burried behind the sub woofer. Can be prone to failure and are not usually repairable as the amplifier chips are encassed in goo on the board. Replacement is usually the answer.

Sounds like the gas pressure sensor to me.

Yep that sounds a little long to me. I would expect to see 3- 3.5ms. Whats the MAF reading at idle with all loads off ?

Your right, those readings Are low. Not sure about the hawkeye, I've only ever used a faultmate but the Motronic ecu will adapt quickly to the new MAF readings.

If the drives failed it wont register on on the screen. Have a look behind the panel and see what youve got. If youve got the MK3 CD unit, you will want to upgrade that to the later MK4 unit identified by DVD on the front.

My monies on one of the coolant pipes at the back of the engine. Most likey the really awkward one that across the back of the block. Whip off the acoustic cover to get better access and climb into the engine bay and peer down the back, you should soon see the problem.

NGK BRP6ES. Don't waste money on fancy plugs.

If it starts with a jump start then it's not a sync problem.

More than likely the LPG is out of tune. The engine ECU will trim the injection times to allow for this but as you switch from petrol to gas the trims will be way out for the different fuel. You need to get some gas diagnostic software so you can watch the injection timing on both fuels and make...

Don't mention your X5..... Aaaah, tits. Sorry.

Oh ok, £20 with carriage

Pressure testers are about £15. Much cheaper than guessing.

55 psi / 3.5 bar fuel pressure at the rail. The pressure regulator is part of the pump assy on the Thors.

The easiest way is to get a hybrid tuner from a 2004 on bmw x5 or similar