SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4-Cyl. injection engine, (1.4 ltr. engine, 2 valve) | Mixture preparation system, electronic inj.,Gas | Checking components

Depression valve: check

Special tools and workshop equipment required

t	Manual vacuum pump -SAT 1390-

t	Vacuum gauge comparator -V.A.G 1368-

Check condition

l	The engine must be switched off

Checking process

–	Dismount the air filter → Fig.

–	Extract the depression valve -1- → Item

–	Couple the depression valve to the vacuum gauge -V.A.G 1368-“intake A” (the arrow on the depression valve 1 points towards the -V.A.G 1368-).

–	Couple up the manual vacuum pump -SAT 1390- to the vacuum gauge checking device -V.A.G 1368-“intake B”.

–	Put the vacuum gauge checking device into position -A/B-

–	Work the manual vacuum pump -SAT 1390- several times. No depression must be created.

Note!

In the rest state, the depression valve is open

If depression is created:

–	Replace the depression valve.

If no depression arises:

–	Cover the mouth -2- of the depression valve.

–	Take out the depression valve by hand.

–	Work the manual vacuum pump -SAT 1390- several times until the valve closes, a click noise should be heard.

Note!

The depression valve shall close with a depression of between 250 and 350 mbar.

If the valve does not close:

–	Replace the depression valve.

SEAT Workshop Service and Repair Manuals