D turbo problem

[Ben Jay]

This is from the bosch guide dan put up

3. Fuel screw

The fuel screw (Located on the right side of the pump) controls the injection length. By turning this screw in you will increase the length of time the pump injects fuel per stroke, and thus end up with more fuel, or smoke. Increasing the injection length will cause the fuel to burn at a hotter temperature and means you get less efficient combustion.

However, it is the simplest way of increasing the fuel and as long as you donâ??t go mad it wont have a noticeable impact on efficiency. At a certain point, usually after turning it in around 6 full turns from stock, it will cause the idle to rise to ~3000rpm. When this happens the fuelling limit for a â??stockâ?? pump is almost reached. You will need to turn the fuel screw back out marginally until the idle drops back down and claw back a little extra fuel elsewhere. The only other simple mod you can do to increasing fuelling from here is an LDA rotate/grind.