This increased fuel supply is also needed for cooling and to reduce fuel steam bubbles in engine compartment. If your car consumes more than that -), this cannot be supplied by your original fuel pump. 0.8 l/30s would mean a fuel consumption of roughly 100 l/100km if running at 200 km/h. That is why fuel pump always supplies much more fuel (0.6 to 0.8 liter in 30 seconds, in some cars even more than a liter). Otherwise pressure would decrease and amount of fuel injected would be indeterminable. In order to achieve this, fuel pump must always supply more fuel than the engine might consume ain any state, no matter whether you accelerate or run at full-load on a German highway. Otherwise ECU cannot control the amount of fuel injected. It is eminently important that this value stays constant at all speeds and loads of engine. Nearly all D-Jetronic systems run at 2.0 + 0.1 bar, meaning between 2.0 and 2.1 bar (exception: Volvo). The Bosch D-Jetronic fuel injection system injects intermittently and determines amount of fuel by opening times of injectors. Anhang C: Literatur und Referenzen - in Vorbereitung.Appendix B: Pinout of ECUs by car manufacturer.
Teil 16: Meine Fundgrube und Reparaturmöglichkeiten - in Vorbereitung.Chapter 15: Jaguar XJ12 and XJ-S specialties.Chapter 14: Checklist troubleshooting D-Jetronic.Chapter 9: Cold start and auxiliary air (aka air slide) valve.8.2.2 Changing from early to late pump model.8.2.1 Why do modern K-Jetronic fuel pumps not fit?.Chapter 8: Fuel pump and pressure regulator.Chapter 4: Intake manifold pressure (MAP) sensor.
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