ml 270 cdi low injector voltage

[perovuk]

Hello everyone,i have problem whit ml270cdi 2001 year,car wont start.
diagnostic shows errors that injectors open circuit,but after every start other injector p0201,p0202,p0203.....never the same.
took off injectors and check all ok.
wiring and power suplay ok.
after measurement of signals whit osciloskop I saw that voltage on inj. are only 20v but signal look ok.
in ecu cant finde no one burned element,try to change BYV32EB and all P4363 but no joy.
1 driver dont have mark,maybe someone knows what is it
or any other advice is welcome
tnx!

[hk06]

maybe you have probleme in the flyweel. but be sure that the engine ecu is ok

[perovuk]

Crank.sensor signal is OK.
Why ecu report injectors faulty if is problem in flywheel?

[Jan1980]

Ok, signal looks fine, but 20 volts are not enough. You have to go with 70-80 volts. If you connect ecu on bench with ampere tester, ampere has to swing shortly while turn on and turn off voltage supply. It seems to be a problem with injector voltage transformer. First step, i would swap all capacitors. Easy and fast job. Try and report !

[perovuk]

I tried that but same thing.
start car whit other ECU