Idle Speed too low..as if car is switced off

[poorav81]

Hello all.
I own a 1.8 20v 1998 VW Passat. Petrol.

I was driving on M1 Luton at 50mph and due to heavy traffic, i was going slow..
The idle speed when not in motion, kept on going up and down.
I have no clue what is going on.
Suddenly, when i was turning, the power steering lost the power and the car stalled .
This was at something 10-20mph.
Its scary when this happens.
now it just happens again and again.
during idle speed, the acceleration rpm goes very low as if its going to stall and suddenly jumps up.

If you can guide me a procedure to follow to fix the problem it would be great.

Please help. I dont know what the problem is.


I was told that the problem could be to do with the idle stabilizer/actuator valve.
but i dont know where its located ?

Thanks,
Purav

[MOSES]

purav i seem to have same problem with my 1.6 97 passat. Will progressively get worse, dont know whats causing it yet the garage can't find a problem with it either. When driving it will judder violently cutting out and restarting and at very low speeds will cut out dead electrics, power steering, brake pressure, steering wheel locks. If you discover what it is please post a reply. Sorry can,t be any help. moses

[Mr.I Kenney]

Hello all.
I own a 1.8 20v 1998 VW Passat. Petrol.

I was driving on M1 Luton at 50mph and due to heavy traffic, i was going slow..
The idle speed when not in motion, kept on going up and down.
I have no clue what is going on.
Suddenly, when i was turning, the power steering lost the power and the car stalled .
This was at something 10-20mph.
Its scary when this happens.
now it just happens again and again.
during idle speed, the acceleration rpm goes very low as if its going to stall and suddenly jumps up.

If you can guide me a procedure to follow to fix the problem it would be great.

Please help. I dont know what the problem is.


I was told that the problem could be to do with the idle stabilizer/actuator valve.
but i dont know where its located ?

Thanks,
Purav

Hi Purav
I had the same problem with my passat and found the problem to be the throttle body needed cleaning. Very easy to do yourself.
http://www.taligentx.com/passat/main.../throttlebody/

Cheers Ian

[poorav81]

hi,
i received a reply from somebody.. i have pasted the email below...

Hi Purav
I had the same problem with my passat and found the problem to be the throttle body needed cleaning. Very easy to do yourself.
http://www.taligentx.com/passat/main.../throttlebody/

Cheers Ian

[Mr.I Kenney]

hi Parav
It was me who replied.Hope the information was useful.Didn't press the right button to reply.
Think I have sussed it now.

Cheers Ian

[poorav81]

ThanksIan, I shall open it up tomorrow and fix it.

I also have further info that this problem might be due to vaccum leakaga problem fom the inlet manifold..

thanks,
purav

[MOSES]

Problem solved at last by a local garage. Running like new.

purav i seem to have same problem with my 1.6 97 passat. Will progressively get worse, dont know whats causing it yet the garage can't find a problem with it either. When driving it will judder violently cutting out and restarting and at very low speeds will cut out dead electrics, power steering, brake pressure, steering wheel locks. If you discover what it is please post a reply. Sorry can,t be any help. moses

It was the crank sensor ( a magnetic sensor that senses a purposely set gap on the cranck wheel) used for timing the engine as you drive. As it was damaged from touching the crank fly wheel it had lost a quarter of an inch of its original length. And obviously was not timing the engine correcly causing the violent judder and stalling. Was found on their code reading machine came out as FAULT FOUND 00513 CRANK SENS G28 SPEED SIGNAL.

Obviously there are loads of faults that can be responsible for the car troubles mentioned on this page and this was mine. just posting this thread to tell you how my fault was resolved. cheers lads. moses.