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Thanks for sharing!

I have checked quite thoroughly without finding any vacuum leaks in the brake servo piping or elsewhere.

I get error code: P0106 - MAP sensor range/performance problem, where one of the described fault sources include carbon buildup in the EGR valve vac line.

I plan to measure ...

Yes, its the vertical double over pipe coming from the same chamber after the air filter as the horizontal pipe on the left.

I have not found anything about it online. Maybe it was originally plugged?

I have changed the EGR, performed basic settings and tested the EGR.

Have also looked at the EGR-throttle body pipe, but as it was not fully blocked I thought it would provide sufficient flow and did not clean it.
Do you think reduced flow in the EGR-throttle body pipe could cause erratic idle?

Found a part catalogue drawing (https://ifinterface.com/ under Free Services, CarProg2) which denotes the end part as Air Filter. From the drawing it does not seem to have a cap, so this is probably OK

I have just changed the EGR valve on a 2002 1.4 16 petrol. I re-attached the breather hose, but wondered the plastic end piece(valve?) is OK or if a cover is missing?

Thanks,
Bjarne
Oslo, Norway

Pic shows engine cover vacuum hose connections on LHD car with the brake fluid reservoir on the left.

The car have been running for years with the ( ? ) vacuum connection open when a mechanic discovered it was missing today. He was unable to find the other connection, so he temporarily attached a ...