leak in piping;
ignition has retarded; or
problem with knock sensor (gives the same effect as ignition has retarded.
First two you know how to check. For the knock sensor check you ecu error codes. Also both the knock sensors are on the lhs below the inlet manifold. It is easy to dislodge the plugs just check them.
Have copied in the codes.
Craig
1GGTEU
Code No. System Diagnosis Trouble Area
11 ECU (+B) Wire severance, however slight, in +B (ECU) 1. Main relay circuit2. Main relay3. ECU
12 RPM signal No G1,G2,Ne signal to ECU within several seconds after engine is cranked. 1. Distributor circuit2. Distributor3. Starter signal circuit4. ECU
13 RPM signal No Ne signal to ECU within several seconds after engine reaches 1000 rpm. Same as 12. above.
14 Ignition signal No signal from igniters three times in succession 1. Igniter Circuit (+B, 1Gt, 1Gf)2. Igniter3. ECU
21 O2 sensor Engine reaches 1500 rpm and coolant is >50c for a period of time (engine temp stabilised) and O2 sensor shows lean for several seconds 1. Oxygen circuit (O2,V2)2. O2 sensor3. ECU
22 Water thermo sensor signal Open or short circuit in coolant temperature sensor 1. Coolant temp. circuit2. Coolant temp. sensor3. ECU
24 Intake air thermo sensor signal Open or short circuit in intake air temperature sensor 1. Air intake temp. circuit2. Air intake temp sensor3. ECU
31 Air flow meter signal Open circuit in E2 or Vc and E2 short circuited when idle points are closed 1. Air flow meter circuit2. Air flow meter3. ECU
32 Air flow meter signal Open circuit in E2 or Vc and Vs short circuited 1. Air flow meter circuit2. Air flow meter3. ECU
34 Over Boost (Air to Water Intercooler) Water temp. > 70c and high turbo boost has resulted in fuel cut (Note – This signal may appears instead of 31) 1. Over boost circuit2. ECU
35 Pressure sensor Water temp. > 70c and low intake airflow and high boost pressure. 1. Pressure sensor circuit2. Pressure sensor3. ECU
41 Throttle position sensor Simultaneous IDL and PSW signal to ECU 1. Throttle position sensor circuit2. Throttle position sensor3. ECU
42 Vehicle speed sensor signal Signal informing ECU that vehicle speed is 2 km/h or less has been input to the ECU for 5 seconds with engine running at 3,000 rpm or more 1. Vehicle speed sensor circuit2. Vehicle speed sensor3. ECU
43 Starter signal (+B) No vehicle speed and no STA signal to ECU when engine is running over 800rpm 1. Main relay circuit2. IG switch circuit (starter)3. IG switch4. ECU
51 Switch signal Air conditioning switch on or gear selector not in N or Pk during diagnostic check
52 Knock sensor Engine at > 2000 rpm and no signal received from knock sensor 1. Knock sensor circuit2. Knock sensor3. ECU
54 Intercooler computer No signal received from water intercooler computer 1. Intercooler computer circuit2. Intercooler computer3. ECU
Tue, 07 October 2003 03:25
