Question about Saab 93

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Turbo kik in at over 2500 rpm idling black smoke

Turbo tdi

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First what car are we talking about?
if you have black smoke, one of high preassure hoses is broken. that also explain late and poor turbo.

Posted on Feb 09, 2012

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Posted on Jan 02, 2017

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SOURCE: gt tdi

Maybe there is a hole in one of the parts.

Posted on Jun 17, 2008

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SOURCE: volvo 1998 v70 tdi loss

I don't know about the turbo running at half, but I can give you two ideas.

If it only started after the timing belt was replaced there is a very good chance that the timing is off. The car has very specific instructions due to the variable valve timing.

There is also a chance that there is a hole in one of the turbo hoses. One way to check for a leaking turbo hose is to put the car in reverse and set the parking brake. have someone listen for a large air leak while you power stall the engine. if there is a leak it will make a lot of noise and you can feel for it with your hand, just don't burn yourself.



I hope this helps

Posted on Feb 23, 2009

  • 1 Answer

SOURCE: 2006 VW tdi black smoke while accelerating

I have the same problem. Do you have a DSG transmission? There are complaints on VW clubs about this problem. It seemed like an engine control issue but it is actually a confused transmission in my case. It seems to have trouble engaging and must send a signal to the engine to kill power. Recalibrating the transmission with VAG-COM made the problem go from a 3x daily issue to a weekly one. I have read that the DSG is very sensitive to oil levels. I am going to set mine properly and see if it helps. The calibration/adaptation only takes 10 minutes with VAG-COM

Posted on Apr 04, 2009

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SOURCE: 2001 Jetta TDI - Sluggish with black smoke

not usually you would hear a vacuum leak

Posted on Jul 24, 2009

  • 677 Answers

SOURCE: have a polo 1.4 tdi and the car does not rev up !

It may be a few different problems but try this first.Take the air filter out and try the engine, then.If its a lot different the filter may be clogged.This will cost zero but may give you an answer.Hope this helps. PS dont go driving around without the air filter as it will damage the motor

Posted on Dec 09, 2009

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When did you last replace the air filter?
Check the air filter it may have been clogged by dust.
If its (air-filter) ok thn you will have to get the injector pump and the injector nozzles serviced.
Hope this helps!

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Smoking golf 4 tdi


Assuming no combustion chamber or fuel delivery faults, most turbo diesel engines exhibits this. The delayed is referred to as turbo lag and the smoke is fuel not completely burned since the fuel system tends to be a little rich when the turbo has not attained boosting RPM. Other than to have your injectors cleaned/replaced, the injector pump re-calibrated and/or the turbo checked for leakage, nothing much could really be done. Alternatives are to use fuel additives, re-check of the computer's map/software and/or change of driving habits. The idea is not to floor the accelerator until the turbo has reached the designated RPM where it kicks in.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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