Diesel Power

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Mon 13 May 2002 15:23
Diesel Power - John Davis
I am not totally familiar with diesel injection pump adjustments ie, automotive type but, to get my 2Lt Toyota Masterace through it's MOT, the local specialists adjusted the pump to bring the emission reading down to the required level of 3. In fact, the average recorded level, on my engine, is now 1.36. ( Out of interest, is this 1.36 "particles" per million ?)
I now have a noticeable reduction in power. The air filter has been changed recently, the injectors have been cleaned and I change the engine oil at every 3000 miles. Could anyone kindly advise if the loss of power is a penalty which I must pay for the low emission reading or, is there some adjustments which I can make, without jeopardising the emission figure, to give me a bit more power ? Any comments/advise would be much appreciated
Thanks.
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Mon 13 May 2002 17:51
Diesel Power - Dave N
I think the only adjustment you can make is to turn the screw up again. As it probably has a old type IDI engine, the only way to cleanit up is to reduce the fuel, hence reduced power, hence reduced emmisions. It may be that the injectors are worn and are giving a poor pattern, and the only way to bring it in line is to reduce the overall fueling. It's a standard thing done to imports to get them through the MOT/SVA.
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