RE: CIS-E problem VW related

["Perry, Chris" <perryc@wdni.com>]

I had a similar problem with my 90 VW Passat 16v.  Same symptoms but it
would happen to me when the car was running, and then it would slowly loose
power and die.  I notieced that my distributor was leaking oil and it was
bathing the hall sensor with hot oil.  I think this made the hall sensor go
bad and caused the erratic engine\tachometer performance.  I replaced the
distributor, which came with a hall sensor, and it fixed the problem.  

I know that having a bad hall sensor was causing the engine problems, but I
am not sure why it made the tach jump around.  I know it is an electronic
tach but I thought it took its signal from a sensor on the transmission.

cheers, 
chris perry

> -----Original Message-----
> From:	IraT@aol.com [SMTP:IraT@aol.com]
> Sent:	Thursday, July 08, 1999 9:32 AM
> Cc:	quattro@audifans.com
> Subject:	CIS-E problem VW related
> 
> I'm sorry to post this to the quattro list but I know many Audis and 
> Volkswagens use the CIS-E engine/fuel management.  So here goes. My
> brother 
> has an '88 16v Scirocco CIS-E and is having problems with what sounds like
> 
> some type of ignition problem.  My brother is in Dallas and I'm in north 
> eastern Tennessee so its kinda hard for me to diagnose the problem. He has
> 
> replaced the coil (Bosch) plug wires, O2 sensor and checked for loose
> wires 
> vacuum leaks, etc.  Each new part has helped the car but the problem still
> 
> persists.  This what my brother says about the problem 
> 
> "it is directly related to the tachometer, because whenever it starts and 
> runs bad the tach will hang on either 2,000 and stay, or it will hang on 
> 8,000 and not move while the motor is running.  I have to kill the engine
> and 
> then restart it until it runs ok, it only does it on start up though, it 
> won't do it any time it's running ok.  It still backfires through the
> pipe, 
> and misfires, when it acts up, so I don't know what the heck it is"
> 
> If anyone could shed some light on this problem please let me know.
> 
> Thank you,
> Ira T