Help Passat B7 smoke and engine knock

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Gusdip
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Help Passat B7 smoke and engine knock

Post by Gusdip »

Good Day,

I need your expert advice please. My 2013 Passat B7 TDI common rail smokes and knocks on first start every day. Here is a link to a video I took this morning.

https://www.youtube.com/watch?v=GmVHMttp3ok

Some background. In August the dreaded cambelt skipped a few teeth and the head got destroyed. I had the head replaced with a recon unit bought from SAC Engineering. The smoke and diesel knock problem started after that. The gentleman who installed the new head has no idea why this is happening. We even had all the injectors pressure tested and the are all ok. No errors on VAC.

This is happening only on the first start in the morning. The car has exactly the same amount of power, and the fuel efficiency has not decreased. Basically everything is the same as it was before except for the smoke and engine knock on cold start.

I welcome you to please help me brainstorm this. The cambelt issue cost me over R40k, so I cant spend much more.

Kind Regards

Gustav
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panic-mechanic
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Re: Help Passat B7 smoke and engine knock

Post by panic-mechanic »

possibly leaking / dripping injector. if an injector leaks or drips after shutdown you might have that issue on startup if it had dripped fuel in liquid form into the chamber.
Other than that have you checked for correct temperature in vcds ie. that it reports cold when it is cold.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
Gusdip
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Re: Help Passat B7 smoke and engine knock

Post by Gusdip »

Thank you for the response.

I don’t have a vcds to check. Is it possible to unplug the sensor so that it reports cold? If so, where can I find it?

Thanks
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panic-mechanic
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Re: Help Passat B7 smoke and engine knock

Post by panic-mechanic »

no if you unplug the sensor it will jut cause another fault in the management
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
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Carel040
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Re: Help Passat B7 smoke and engine knock

Post by Carel040 »

Hi Gustaf

Where are u based


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Gusdip
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Re: Help Passat B7 smoke and engine knock

Post by Gusdip »

Carel040 wrote:Hi Gustaf

Where are u based


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Hi Carel,

Im based in Pta.

Thanks
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Carel040
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Re: Help Passat B7 smoke and engine knock

Post by Carel040 »

Hi Gustaf het jy al jou problem op gelos

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panic-mechanic
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Re: Help Passat B7 smoke and engine knock

Post by panic-mechanic »

In pretoria contact thos guy. Trevor greene 0833095033
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
Gusdip
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Re: Help Passat B7 smoke and engine knock

Post by Gusdip »

Carel040 wrote:Hi Gustaf het jy al jou problem op gelos

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Hi Carel

Nog nie.

Gustav
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Carel040
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Re: Help Passat B7 smoke and engine knock

Post by Carel040 »

Ok Bel my pel Thavishen +27718701411 hy het VCDS Kan jou Kar scan en se wat die fout is

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