I think I am in trouble again
My car (156 ts selespeed) has some problems and here are the symptoms:
1) The sound coming from the actuator is not good at some times
- it is rather harsh. I can feel it during driving.
2) In last 5 days, 3 times it didn't want to engage to 1st gear - engine on/off - problem solved.
3) While my better half driving the car (in city mode) and while I am driving (manual engagement) it went to N several times....
Up to now, I believe most of the symptoms can be explained by failing accumulator or the pump.
Although, here is the story: 6 months ago I replaced the accumulator (i had N issues) and it seemed to solve the issue. 4 months ago it started to do stupid things (not engaging at all - locked gears, etc.); but it did fix itself in summer! (have no idea how/why).... So, I bought a second hand pump but didn't have it installed yet (waited for pump to die on me completely).
After above symptoms appeared within last 2 weeks, I went to my mechanic today thinking that my pump is almost dead. He connected the car to the examiner. After checking the relays and the pressure (started with 51 bars dropped to 47-48 while engine was not working), he told me that my problem is not the pump but the actuator. Unfortunately, here they have limited knowledge on fixing the actuator and asked for $$$ for a second hand whole actuator unit.
According to my research, system consists of:
EV0: solenoid valve to control the clutch actuator
EV1: solenoid valve to control the engagement of the odd gears 1-3-5
EV2: solenoid valve to control the engagement of the odd gears 2-4-R
EV3: on-off solenoid valve to control 1-2 gear
EV4: on-off solenoid valve to control 5-R gear
Hydraulic circuit pressure sensor
Actuator position sensor
Gear selection position sensor
Gear engagement position sensor
Clutch position sensor
Clutch disk speed sensor
If you are still with me, which parts do you think I should invest?
Also, I would be GREATLY appreciated if you let me know the fiat equivalent part numbers of systems parts...
Note: I have rarebear's cable and fes in hand; and even I am a noob in fixing cars, I think I can perform some tests to understand the matter or help you to identify the issues.
Note2: there are no fault errors.