Am si eu o problema cu masina mea SEAT Toledo din 2006 , 2.0 tdi 140 cai. Mentionez ca masina am cumparato de 3 luni...
La pornire scotea fum albastru, si pornea din ce in ce mai greu, si la -15 grade deja chiar ca pornea ff greu, ca si un tractor... si de 2 zile imi oscileaza turatia, s in relanti si cand accelerez, apas pe acceleratie si creste turatia scade dupa aia creste brusc,parca franeaza ceva morotul, iar in relanti oscileaza intre 700-900 rpm(astazi la -3 grade deja nu mai oscila asa tare)....mentionez ca am observat ceva pete de ulei in borcan del a antigel, din cate am vazut nu dispare antigel.....
5 Faults Found:
17055 - Cylinder 1 Glow Plug Circuit (Q10)
P0671 - 000 - Electrical Fault
Freeze Frame:
RPM: 0 /min
Torque: 254.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.16 V
Bin. Bits: 00001100
Temperature: -6.3°C
Bin. Bits: 00110000

17056 - Cylinder 2 Glow Plug Circuit (Q11)
P0672 - 000 - Electrical Fault
Freeze Frame:
RPM: 0 /min
Torque: 254.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.16 V
Bin. Bits: 00001100
Temperature: -6.3°C
Bin. Bits: 00110000

17057 - Cylinder 3 Glow Plug Circuit (Q12)
P0673 - 000 - Electrical Fault
Freeze Frame:
RPM: 0 /min
Torque: 254.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.16 V
Bin. Bits: 00001100
Temperature: -6.3°C
Bin. Bits: 00110000

17058 - Cylinder 4 Glow Plug Circuit (Q13)
P0674 - 000 - Electrical Fault
Freeze Frame:
RPM: 0 /min
Torque: 254.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.16 V
Bin. Bits: 00001100
Temperature: -6.3°C
Bin. Bits: 00110000

16618 - Boost Pressure Regulation
P0234 - 000 - Limit Exceeded (Overboost Condition)
Freeze Frame:
RPM: 2814 /min
Torque: 296.0 Nm
Speed: 89.0 km/h
Load: 64.7 %
Voltage: 14.67 V
Bin. Bits: 00001000
Absolute Pres.: 2131.8 mbar
Absolute Pres.: 2590.8 mbar

alta eroare nu apare , din cate am inteles este posibil ca bujiile sunt arse, iar valva N75 este defect
va mai pun si un alt test:
21:41:38 Group 003: Exhaust Gas Recirculation (EGR)
819 /min Engine Speed (G28)
315.0 mg/str Exhaust Gas Recirculat. (spec.)
455.0 mg/str Exhaust Gas Recirculat. (actual)
96.4 % Exhaust Gas Recirc. Duty Cycle

21:41:38 Group 010: Charge Pressure Control
450.0 mg/str Mass Air Flow (actual)
1009.8 mbar Atmospheric Pressure
989.4 mbar Boost Pressure (actual)
0.0 % Accel. Pedal Pos. Sensor 1 (G79)

21:41:38 Group 011: Charge Pressure Control
819 /min Engine Speed (G28)
999.6 mbar Boost Pressure (specified)
989.4 mbar Boost Pressure (actual)
76.1 % Charge Pressure Control Duty Cycle

asta era chiar dupa pornire, iar dupa 2 minute amfacut un test:
21:43:48 Group 007: Temperatures
18.0°C Fuel Temperature (G81)

-2.7°C Intake Air Temperature (G72)
27.0°C Coolant Temperature (G62)

21:43:48 Group 013: Idle Stabilization (Injection Quantity Deviation)
-3.01 mg/str Injection Quantity Deviation Cyl. 1
0.56 mg/str Injection Quantity Deviation Cyl. 2
1.13 mg/str Injection Quantity Deviation Cyl. 3
1.29 mg/str Injection Quantity Deviation Cyl. 4

21:43:48 Group 011: Charge Pressure Control
819 /min Engine Speed (G28)
999.6 mbar Boost Pressure (specified)
989.4 mbar Boost Pressure (actual)
76.1 % Charge Pressure Control Duty Cycle

imi puteti spune ceva?a mai patit asa cineva? nu vreau sa umblu la mecanic pe degeaba....

In primul rand bujiile cu incandescenta: nu e obligatoriu sa fie duse (nu mai zic ca e ciudat sa se fi dus toate in acelasi timp), ci e posibil sa nu-ti mearga releul de bujii chiar. Cu " overboost pressure" pot fi mai multe cauze - geometrie variabila, valva de comanda EGR, vacuum lipsa ( depind ce EGR ai, pe baza de vacuum sau electronic).
Injectorul 1 e cu capul, iar 4 il urmeaza in curand. Cam astea ar fi directiile de verificat.