Technical emission, hesitation on 1st gear to 2nd and black smoke bursts

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Technical emission, hesitation on 1st gear to 2nd and black smoke bursts

shambi

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May 10, 2010
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hi

Current status of my symptoms
1. car hesitate on 1st to 2nd gear from stand still to movement, from time to time with burst of smoke cloud.
2. when gas pedal is pressed to the floor (neutral gear) a burst of black smoke appears too.
3. MOT emission failed.

i've replaced the MAF - still no improvement.

"on the previous chapters":
just before i've had power loss with black smoke clouds,
with Error code "P0236 over-boost valve"
as a mitigation,
a pipe was replaced (in the garage) a pipe from the inter-cooler to the manifold that runs beneath the air filter


- that eliminated the majority of the black smoke
- it seems that the black smoke on high gear/engine rev eliminated
- Error code "P0236 over-boost valve" eliminated too

Any suggestions?
 
We had the same problem which got worse leading to stalling and failure to start. After heaps of diagnostics inc the MAF sensor -it was the EGR valve. Sooted up and stuck.
 
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