mk2

Take the SDI with you... Bargain car for someone at that price. An SDI makes a great cheap commuter car or for small delivery drivers.

Well I can confirm that brand new, regular poverty spec, mk4 golf front springs fit perfectly, but are too soft for a SDI. Lowering springs! The ride height is now about 50mm down on where it should be. Hmm. Next....! Gonna try VR6 mk4 springs next. That's a heavier engine, so might be perfect for the diesel lump up front. Hard to believe that the front of a SDI is heavier than a regular mk4 golf.

All HID tube drivers are the same. If the system uses a standard 35W Xenon filled tube, then the drive voltage and current is always the same. The things that are different are the plugs and sockets, the box it's in and if there's a CAN bus or fault detection interface. It's a pretty dumb piece of electronics, just like a fan controller. But I wouldn't mess with it unless you know what you're doing, as the tube driver voltage is lethal. Thousands of volts.

I must be missing something. Unless you know the memory address space in the ECU, knowing which pin the K line is on is like knowing the moon is in the sky. Doesn't mean you can just visit it... In the ECU code, there is 100% certain an IMMO off select function. But knowing where it is, is factory info that of course is and never has been made public. You can mess about trying to activate and deactivate various features by experimentation, where most of the time you end up bricking the ECU. Although, once you get a few things right, you know the approx addresses of things that make a difference and suddenly you know how to do stuff in an ECU. Speak to Uwe Ross from rosstech... VAGCOM or VCDS as it's now called. But he did have help from friends at local vdub dealers who allowed him to play on the VAS system (in house VW dealer only computer interface), which he had loggers attached to the serial data lines- which gave him the memory addresses. The more spare ECUs you have, the more experiments you can do. But that is generally only true once the ECUs become cheap, from older models. So new cars are usually main dealer only to do really simple stuff.

Silver aluminium pipe.

Welcome to club lupo not done that mod, so you might be on your own. @Rich might know someone who's done the retrofit... I'd guess you'd need to make sure the air flows right between flanges. Die grinder time... keep everything else stock.

The sensor on the bulkhead behind the engine is easy to change. Or you can unplug it and see if there's a change. It is usually controlled (on manual ac cars) by the fan controller module.

So @yeha's springs won't fit as standard. Hmm. Ok.

So (stupid question maybe), how do the mondeo springs fit the strut bearing and the strut base?

I don't, but just follow the pipes...

I honestly dont know without having vcds in front of me. By the way, some of the label files can be wrong, so you think you're looking at one sensor, whereas the readings you're seeing are actually from something completely different!

Has a mondeo got the same spring cups? That's a new one to me...

Ok, cool. What car did you buy them for?

You can use VAGCOM (VCDS) to diagnose the Lambda voltage. If you start graphing the voltage from stone cold, you should see it rise then change from open loop to closed loop control, once warm. It should hover around 0.7V from memory. When rich, it goes down, lean goes up (more oxygen).

Is the compressor turning on and off while the car is stationary? Idling. It should be. Might just need a new overpressure switch.

Nah, not yet. I'm going to try a pair of new mk4 golf springs, which have the same part number, but not sure about the rating. So the front of my car might ride too high, too low or just right... What are your springs like? They'll fit regular shocks? OEM ride height? I'll have a read of that link.

The PD engine change must have taken a while. Still going at 3 in the morning.....?

If the compressor turns off, then something is disconnecting it. On most vdub cars, there is a fan controller unit, which also has a relay which controls the 12v compressor coil. It could be that?

Rear fog light warning indicator. Looks "exactly" like a jellyfish on its side. I can't look at it the same way ever again.

No one picking up on my jellyfish symbol...? Someone else pointed it out to me. Never noticed that it's a jellyfish before. My life is ruined.

4 fluids that are oil based in the engine bay... engine oil, gearbox oil, diesel and power steering fluid. could be the injector air bleed fuel return, or possibly supply (unlikely). Fuel system is pumped in a PD injector engine, so the diesel supply has lowish pressure...? Like @Rich says, check the fuel lines, joins.

Just got back from Kent today after doing about 230miles. Bad very wet driving (increased drag) but still managed 75mpg, based on the fuel gauge being in the exact same place as when I left, 14L. Relatively level driving the whole way. And I even had the the little yellow jelly fish reminder light on in the instrument cluster.......

R134 pressure too high. Over pressure switch turns off the compresser I'm guessing...?

Go the flat long way, or the short hilly way. Which is more economical. Discuss. Sounds like someone is doing the automotive engineering uni course.

Crack? I hate problems like that...