Ok, I've got one for ya, Scirocco List!

[rapieper at yahoo.com (Ron Pieper)]

Vacuum ALWAYS matters...it's *the* key input to MS.

But I'd suspect valve damage, and suggest a compression check to verify.  

Do it w/ throttle held open, once w/ no oil, again w/ oil, same quantity in each cyl...lotsa good
directions out there....

Ron

--- Timbo <timjmcconnell@xxxxxxxxx> wrote:

> I've been battling this problem for years - ever since I've owned this rocco.
> 
> It's a misfire at idle. It doesn't happen all the time, just most of
> the time. It makes the RPM drop a bit.   It does it a lot when the car
> is first started - it's running on 3 cylinders for the first minute or
> two.
> 
> Keep in mind that it has done this on CIS and megasquirt alike...
> 
> 
> Anyway, here's the things I've replaced... It's a huge list...
> 
> Every single part of the cooling system
> New complete ignition system including the Coil and Distributor
> CIS is gone, all the injectors and all that are different.
> New spark plug wires, I do new plugs every 10k (NGK or Bosch Super
> coppers) New cap and rotor multiple times
> I've checked for vacuum leaks - don't have any - they don't matter for
> megasqurit anyway.
> All engine wiring... twice.
> 4 oxygen sensors
> New downpipe, manifold, muffler
> All the gaskets you can think of...
> 
> 
> Now, what the heck is left? Could it be a valve problem of some sort?
> I'm out of ideas...
> 
> --Timbo
> 
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