Hello
I need a help with my alfa romeo 156 Swagon 2.4JTD 150Bhp, year 2001
Problem is that my air pipes for turbo actuator and throttle body actuator, Turbo solenoid valve and throttle body solenoid valve. They are all conected tru vacuum reservoir but I am not sure how.
I download some Elearn for alfa romeo but there is not a nought info.
Thanks for help
reason why I am asking is that non of the solenoids is switching on.They are new. My turbo is free. but the actulator on it is not mooving. the some with throttle body. I replaced all pipes for new one.
Still nothing.
I put the car on PC using fiatECU and it i showing me this:
P0236 overboost valve – signal low\ stored \ light on
Boost Pressure sensor A circuit range/performance
The reason for this fault is that ECU has received very low signal from the sensor. The fault is not detected now, but it is stored in memory. Clear fault codes, and observe for future appearance of the same fault. Dashboard warning light was activated for this fault.
It sounds like the car is suck in low boost mode ie you have less boost than the ECU expects. The ECU sends a signal to the VNT solenoid which to move the turbo vanes by regulating the vacuum to the actuator. This should move when you turn the ignition on. If not, then the turbo vales are stuck (sounds like you have ruled this out), you have no vacuum (ruled out), you have a cracked pipe (common but sounds like you have changed this) or the VNT soleoid is faulty. I've (hopefully) attached a diagram that I saved ages ago that may help
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