 Figure 1: Mixture Screw on MPC (L-Jetronic) Motor  Figure 2: Mixture Screw on MPC (L-Jetronic) Motor |
Question: How do I set the fuel
mixture on my 914? Answer: The fuel mixture is adjusted using an adjusting potentiometer on the fuel injection brain for the 1.7 and 2.0 cars. This is shown in Figure 1. For the 1.8 cars, there is an adjustment screw on the Bosch airbox, as shown in Figure 2. Turning clock-wise on the screw makes the mixture richer, turning counter clock-wise makes the car run leaner. The mixture cannot be properly set without measuring the exhaust with a CO meter. Beginning in 1998, Pelican Parts will offer free CO testing to the Porsche community. For more details, see our Special Services section. |
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