Hi Guys,

 

First post here so hello all as a start. My engine warning light has come on (yet again) this time its the throttle body sensor. The mechanics I have spoken to so far all say they have to get the part from VAG at a cost of 500 quid and cannot get after market parts. I do a google search and can find them from £200 up. Now I have just had to replaced the water pump and then had to have the timing chain done as it had skipped a couple of teeth, so this will push my repair bill for this month to over £1600.

 

Anyone have any experience of this? I cant afford another £500+ on this bloody car.

 

Cheers

S

I’ve found that certain problems seem to come up as the mileage increases. The inlet manifold flaps get stuck. The messages from code readers are cryptic like Manifold runner position sensor - range performance or Manifold runner stuck. Some people try to fix worn out flaps in their manifold. I have a plastic manifold and despite attempts to resolve it using a special little bracket, it proved hopeless and I had to buy a new manifold. I didn’t at the time realise it is possible to get a manifold flap repair kit. But whichever way the manifold invariably has to come off. Then I discovered my manifold actuator motor was shorting to ground. That was bizarre. Everyone wants to charge big money, but if you get a better understanding of the situation, it’s possible to resolve these issues oneself with the purchase of a few tools. But one must get an understanding of the complex system that controls these engines. For example I took apart my V100 throttle body to service it. What I did not realise is that a magnet is hidden inside a gear cog in the mechanism and if you remove that gear cog without noting precisely it’s position, then it’s highly unlikely you’ll get that part working again. I’m quite interested to know if other owners have come across this and know what position the magnet inside the gear cog should be in. Here’s a photo in which I have backlit the cog so you can see what’s inside the cog. Not possible to do this with the black cogs, but beware, the magnet is there! But where and how should one reassemble. If others have come across this and can enlighten us, I’m sure it will save other owners a lot of money. Being aware and in the knowledge of this very subtle engineering will enable you to correctly reassemble your actuators, whether the V100 or the V120 / V157. Can you see the magnet? Do you know the correct position it should be placed on the spindle? This cog is from the V100. In the V120 the cog is black so you have a problem unless you can deduce any subtle clues where the magnet is!

 

Edited 29 June, 20214 yr by OctaviaVRS2

I would expect there to be some mark in the housing to denote orientation, these parts are put together correctly by human workers so there must be some method.

I think the question is where is that mark and how does one align the parts? Clearly the embedded piece of metal is inside the gear cog for a reason. Has anyone found out the answer?

Edited 30 June, 20214 yr by OctaviaVRS2

Learn to check for yourself. Improper temperatures on readings work like the north star 😁