What can cause rich running?

[Jonas_R]

Oki i got a way to rich running and vagcom says 00357 error

I will check the following:

fuel pressure too low or too high - How do i do this?

intake or exhaust leak - should be oki as far as i know.

defective ignition system component - well dissy is new, what else could be problem?

intake air leak after air mass sensor - all new hoses no problem here i guess

O2 sensor is faulty Symptom - tried unpluging lamdba but did not change the bad idling

Spark Plug fouling - I got five new plugs ready to fit

Well my problems is that the car simple runs rich, and it seem to be badest in low rpm. Sometimes it dies when in idle.

MAF new, ISV new, N75 new, All hoses small and big new (no boost leak can take pressure fine), wg diagrahm oki just changed it,

Extremely lean or overly rich exhaust - got this error mesaage from sjmautoteknik when searching for 00537,
What does it mean?

How about a bad fuel pump or filter and how can i check this?


Any other suggestions are very welcome

/Jonas R.

[Tommy200rs]

Drive with vagcom datalogger to have more data about what is happening in the engine (channel 00) and check from 00, how the lambda regulation is working. Are you running open air BY-PASS / Dump valve !? That messes the MAF measurements and one symptom is rich.

[jade]

Sounds like my car but i,m still replaceing things to find the problem also feels flat
Jade

[Jonas_R]

3B running with a hybrid k24 turbo and rs2 em.

Iam running stock diverter valve which is also new.

/Jonas R:

[quattronutter]

maybe a fault with the ecu??

[porkkis]

You can measure the fuel pressure from the fuel rail on 3B using a double banjo.

Add both temp sensors to your list. Water/air

[Jonas_R]

Porkiss:

The air sensor you are mentioning is it the one located on top of the IM?

/Jonas R.