After hours of heart ache and a very patient and understanding customer and a lucky fault code appearance I have nailed it :D . For the first time since I have seen this vehicle an EGR fault code got logged. So I checked it, and the wiring to it with no fault found. Now just due to the shear randomn...

There is some slack in the belt but probably not enough to cause an issue. The fact that the ECU is turning off injectors exactly after a camshaft pulse almost definitely means it is an intentional shutdown due to it being "unhappy" with an input. I would like to compare crank and cam with a known g...

Could you scope cam and crank correlation together and upload please

Try unplugging large current consuming actuators 1 at a time. I.e EGR and throttle body motors to see if any of them stop this from happening it's rare but I have seen them leak unwanted voltage into an ECU and cause it to misbehave. Maybe even injector cut off test using scan tool may help.

Kona has pointed out that the injector current has disappeared long before the crank signal did. What ever caused that to happen is probably causing your crank signal on the scan tool to drop out too. You said that there was no fault code? If you simply unplug the crank sensor when running and the E...

Dejan wrote: Because we were desperate,we try one more thing.We put another same car,side by side with faulty one.Then,we connect wiring from CKP sensor in faulty car to the ECM in reference car with unplugged CMP sensors on both cars.While we cranked faulty car we monitored RPM "pid" with scanner ...

Every amps clamp I have ever used or seen has the conversion printed on the side. As every amps clamp I have used gives a voltage reading out of the amps clamp leads. So when you attach it to scope/multimeter you can work out what the amperage is you are measuring.

Are you measuring the signal at the ECU? If so have you tried the pin fitment test between ECU and wiring harness multiplug. I find a screen wash jet unblocking tool works well. Just gently drag it in and out of the female terminal and compare the slight resistance felt to the other terminals (Defin...

Thank You very much for your input. I have since used 1 input on scope having amps clamp on the fuel pressure regulator circuit. Another input monitoring 12V supply to regulator Another input monitoring PWM ground to regulator Another amps clamp monitoring cyl 1 injector current. Unfortunately I am ...

Still fighting this one. I can however confirm that what you are seeing on the waveform that I have uploaded is not EMI nor is it high resistance causing a voltage drop. I can confirm with no doubt that the control side of the fuel pressure regulator is partially being grounded (when it is not suppo...