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Engine Specific Info and Questions => IDI Engine => Topic started by: paolomarks on July 28, 2011, 06:43:31 am

Title: black smoke on an AAZ without turbo
Post by: paolomarks on July 28, 2011, 06:43:31 am

Hello, I have removed the turbo from my AAZ due to catastrophic turbo failure.( turbine shaft broke in two).  I re routed my intake and got a new exhaust put on. It runs fine although with a bit less power of course. What I'm a bit worried about is that it puts out a lot more black smoke now under load.  I understand that this can be controlled by adjusting the "smoke" screw on the IP. Where is this exactly and how much should it be adjusted.  ?  Thanks, Paolo

Title: Re: black smoke on an AAZ without turbo
Post by: vanbcguy on July 28, 2011, 08:42:18 am

The max fuel screw is probably what you will have to adjust.  It is a large screw with a locknut on it above the high pressure lines on the pump.  Small adjustments to this screw have a large impact on fuel delivery - only turn it about 1/4 turn at a time maximum.  Usually it has a steel collar on it and it has a large slot in the end of it.  Loosen it (counter clockwise) to reduce fueling.

After you reduce your fueling you may have to adjust your idle speed again!