Strange idle connected exhaust vibration

[twoqu]

Can't help with the pipe squeezing at the mo!
I would take it off and thoroughly check it. It may have a split which would suck in unmetered air. They go all mushy from the oil mist over the years and it could still be the original hose.
It also fits with our "its on the car" theory!

[220bhp]

Thanks guys.John,I replaced the two valves on the pcv with new ones a couple of weeks ago,and checked the hoses then, but could not find anything.
So I am going to take the inlet manifold of again and remove all the plumbing.I am doing it in my drive way this time John, not yours.This will allow me to recheck everything including the distributor timeing ect.The problem for me at the moment is finding the time.

[newsh]

Lou, can you describe exactly which pipe you pinched to change the idle speed?

You shouldn't have to take the IM off to do any of this.

[220bhp]

John its the smalller pipe that tees of the main one on the block,not the one from the black valve.
The reason I want to take the IM of is to make rechecking everything easier, including
the alignment of the distributor.

[twoqu]

Lou,
I think that one goes back to the inlet. Can't check at the moment.
But as its the other side of the check valve it will not be subject to pressure. It will however let air in if split!
Having thought about it more, of course it would see pressure from the inlet from the other side

[newsh]

Guys, look at the diagram I posted, you can see where the T is. The centre of the T goes to the check valve and the carbon can valve. The top of the T, one side goes to the PCV valve (black saucepan shaped thing) the other side goes via the metal pipe round to the MAF hose.

[220bhp]

The hose I am talking about tees of the main pipe on the block below the pancake valve and runs to the inlet manifold.the smallest one on your diagram John.

[220bhp]

Finaly after all this time the problem is solved,the pcv pipes where on the wrong way round.I sent the car to a local garage called VW Antics to see if they could strip it down and check everything.After having the car for 2 weeks and a bit of reserch they found the problem.Once the IM and the pcv pipes where of they discovered that it was wrong.the pancake valve now faces upwords and the smallest of the two pipes now runs to the rocker cover.The car now idles at 850,no occilating idle and no drone.the car is now drivable in traffic for the first time,which is just fantastic.
The plumbing on this car has been that way round since I bought the car,and every time I have had the car to bits I have put it back as found it,and never questioned it .Lesson learned there for sure
I cleaned all the pcv hoses and had the flame trap out for a clean before I fitted the new engine,they where all in good nick but prity clogged up. Its obvious now that the pipes are clean it would suck in enough unmetered air to make it run badly.
I fell a bit of a foul not to of seen it,but then nor did anyone else notice it,you cant see any thing at the back of a 3b with all the wires ect.
I can only say a big thank you to the forum and all the people on here that have helped me.Special thanks to Newsh and twoq for there end less support

Many Thanks

Lou

[s2driveruk]

Lou - totally made up for you. Finally you can enjoy the car again

[220bhp]

Lou - totally made up for you. Finally you can enjoy the car again

Now going to do just that mate

[newsh]

Wow, brilliant news, at last

I'm really pleased! (where's the little dancing man smiley when you need it!)

[newsh]

The hose I am talking about tees of the main pipe on the block below the pancake valve and runs to the inlet manifold.the smallest one on your diagram John.

Reading this again I can see how this was reversed, that pipe should go to the cam cover, not the IM, wow you've been pressurising the crankcase when on boost too!

[220bhp]

Yes John,I just hope I havent done any damage to my new engine.

[vertigone]

So glad you find out ! Burning roads again

[Greg_S]

Glad you got it all sorted, was running out of ideas as to what else it could have been