Audi A4 1.8T: Erratic Idling

[RazedInBlack]

Good people. I need you advice please.

So I pulled up at a robot and I noticed that my revs were at 12000rpm. This is unusual because at normal idling its usually at 8000rpm or 9000rpm depending on whether the aircon is on or not.

When I pulled in to park at home the idling shot up to 16000rpm then down again to 12000rpm.

This morning when I started the car it started in a higher rev and dropped slowly to 12000 again.


Any idea what this could be?

Gearbox perhaps?

 

[Tech786]

Good people. I need you advice please.

So I pulled up at a robot and I noticed that my revs were at 12000rpm. This is unusual because at normal idling its usually at 8000rpm or 9000rpm depending on whether the aircon is on or not.

When I pulled in to park at home the idling shot up to 16000rpm then down again to 12000rpm.

This morning when I started the car it started in a higher rev and dropped slowly to 12000 again.


Any idea what this could be?

Gearbox perhaps?

12 000??!?!?!?
In an Audi?

Gearbox?:wtf:

 

[M3mPh1z]

When I cold start my Audi it idles at 1200 until it warms up a little then goes down to 800rpm.

Thermostat related?

 

[vicv]

Good people. I need you advice please.

So I pulled up at a robot and I noticed that my revs were at 12000rpm. This is unusual because at normal idling its usually at 8000rpm or 9000rpm depending on whether the aircon is on or not.

When I pulled in to park at home the idling shot up to 16000rpm then down again to 12000rpm.

This morning when I started the car it started in a higher rev and dropped slowly to 12000 again.


Any idea what this could be?

Gearbox perhaps?

I'd say the problem is you need to take out the Kawasaki engine.

 

[rorz0r]

16000rpm.... I want that engine... Must sound insane!

 

[RazedInBlack]

Huh? Ok Maybe that conversion is wrong?

What amount is considered normal?

 

[blaaislaai]

Huh? Ok Maybe that conversion is wrong?

What amount is considered normal?

one zero too much in your rpms

 

[RazedInBlack]

When I cold start my Audi it idles at 1200 until it warms up a little then goes down to 800rpm.

Thermostat related?

Mine doesn't do that. Cold start yes but then immediately drops to normal idling speed.

 

[pjjdp]

could be anything. Have it scanned by a reputable garage or even the stealers.

 

[RazedInBlack]

could be anything. Have it scanned by a reputable garage or even the stealers.

Thanks, I think I should do just that.

 

[Stokstert]

Jo, what a technical thread.

 

[RazedInBlack]

Ok, so apparently air/fuel mixture is a very important factor when trouble shooting issues such as erratic idling.



Had the throttle body taken off and cleaned.

Changed the air filter since it wasn't changed since the last service.

 

[RazedInBlack]

Well the erratic idling continued.

Then found that the breather pipe had broken off.



R420 at agents. For about 10cm of plastic pipe? WTF?

 

[genetic]

How much did they charge you to clean the throttle body?

 

[Ecco]

On the 2.0T engines its a common issue. Some valve usually just needs to be replaced - nothing major. Check out the Audi South Africa forums.

 

[Kloofvreter]

When I cold start my Audi it idles at 1200 until it warms up a little then goes down to 800rpm.

Thermostat related?

This sounds normal.

 

[Kloofvreter]

Well the erratic idling continued.

Then found that the breather pipe had broken off.

View attachment 79713

R420 at agents. For about 10cm of plastic pipe? WTF?

I was going to use the ALIENS meme, but....

"AUDI"

 

[RazedInBlack]

How much did they charge you to clean the throttle body?

No charge. I had someone else do this for me. Someone knowledgeable at least.

 

[M3mPh1z]

This sounds normal.

I know, lol

 

[Rouxenator]

Hoax. Everyone on myBB tells me the sun shines out of the exhausts of VAG products.