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The CR injector control signal has a very complicated course, consisting of four phases. The highest voltage appears in the first opening phase, i.e. the so-called Booster phase, which consists in using a voltage in the range of 50 - 80 V coming from inductive overvoltages accumulated on the capacitor.
Generally speaking, the course of controlling the electromagnetic CR injector can be divided into four separate phases of operation
1 - Booster phase (voltage boost)
2 - Pull phase
3 - Maintenance phase
4 - Switch-off phase.
A schematic, simplified drawing shows this.
The second figure shows the actual signal waveform, the picture shows a screenshot of the oscilloscope from testing a Delphi injector. This is what all four phases of the signal look like - the measurement of the value is possible only on the scale of the oscilloscope screen.
It is better not to go too deep into these issues because this is a dissertation topic. The signal on the oscilloscope is to be correct - and that's it.
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MAP sensor is not expensive - instead of fighting it, it is better to try to replace it with a new one. If that doesn't work, I would suspect the wiring harness to the ECU.
Are both sensor circuits OK? (ohmmeter)
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How long did you run engine using the break fluid sprayr? As I wrote before - sometimes you need to support the engine for up to two minutes to start working independently. The fuel filter must be full before such a start.
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