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Engine Specific Info and Questions => IDI Engine => Topic started by: bencuri on May 16, 2020, 09:04:48 am

Title: Can you indentify this part on the AAZ fuel pump?
Post by: bencuri on May 16, 2020, 09:04:48 am

The part circled red on the photo went wrong in my car. I guess it is called idle control valve, but I managed to find no part by this name for the aaz 1.9td engine. Could anyone tell me the name I can find this with or the part number? Is this part still being sold at all?

(https://i.postimg.cc/0QdTsZ6B/idle-control.jpg)

Title: Re: Can you indentify this part on the AAZ fuel pump?
Post by: BajaVWCamper on July 24, 2020, 10:10:38 am

That actually not a AAZ pump. It has no turbo boost mechanism. Looks to me like that's a 1Y pump. the non turbo version of the AAZ.
That thing is a automatic Coldstart regulator. its a switch that extends (i.e lowers the idle) after about 10 mins when the engine is warm. Instead of having a cable operated coldstart "Choke" like the older diesels this one automatic.

I cant find part numbers but in the German manual its labeled as
Stellelement für Leelaufdrehzahlanhebung N123

roughly translated:
Idle control setting element N123

(https://i.ebayimg.com/00/s/NjAwWDgwMQ==/z/lVYAAOSwxnFcoC6f/$_10.JPG)

other than a slight rough idle at starting this is not really essential to operation.