1.4 TSI idle RPM drop

[mark37]

Dear All,

I am experiencing the following issue in my Seat Leon FR 2013 1.4 TSI CXSA.

Most of the times when I start the engine, the RPM is going down, almost stalling. Even dashboard lights are flickering.

There is no error code, check engine light or anything.

I checked the followings:
-Battery (fully charged)
-Throttle valve (cleaned)
-Spark plug (new)
-Ignition coil
-MAP sensor (seems clean)
-PCV valve (new)

If you have any suggestion please let me know.

Thanks,
Mark

 

[mty12345]

What are your long and short term fuel trim numbers when it's happening?

 

[queen]

Seems like you have either a vacuum leak, a faulty throttle pedal position sensor or a faulty idle air control valve. If it occurs only on idle then it's most likely the valve, though it usually throws a code.