sc400 does not start
04-14-15, 12:41 PM
#1
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sc400 does not start
Ok so I am a new owner of a sc400 1994.
Drove it for about a week and then the engine started misfiring, engine codes were 25 and 26, running lean and running rich.
One day the car would not start. I have changed the fuel pump, caps and rotors. I am getting good fuel pressure and spark is across all cylinders.
The timing belt looks worn but I am not sure this is the cause. Another mechanic has suggested Crank position sensor or cam position sensor.
Right now when I have the diagnostics jumped with a wire the engine check light flashes on and off continuously and wont stop flashing.
Does anyone have any idea what it could be?
Drove it for about a week and then the engine started misfiring, engine codes were 25 and 26, running lean and running rich.
One day the car would not start. I have changed the fuel pump, caps and rotors. I am getting good fuel pressure and spark is across all cylinders.
The timing belt looks worn but I am not sure this is the cause. Another mechanic has suggested Crank position sensor or cam position sensor.
Right now when I have the diagnostics jumped with a wire the engine check light flashes on and off continuously and wont stop flashing.
Does anyone have any idea what it could be?
04-15-15, 06:03 PM
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I had another close look. looks very clean, no bulging or stains anywhere.
This is really bugging me. anything else that could prevent it from starting
?
This is really bugging me. anything else that could prevent it from starting
?
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04-15-15, 06:13 PM
#8
Well a few things to check would be the Trac TPS sensor (if you don't have one, that eliminates that as an issue) check your spark plugs/wires. Make sure they aren't arcing or brittle and stiff. o2 sensor(s) are likely the main issue here if they haven't been replaced in years. They are pretty expensive and if you go cheap you will need to splice the connections. Just for future reference here is a list of the OBDI codes.
lOBD1 Codes
1 Normal Condition.
2 Air Flow Meter signal.
3 Ignition signal.
4 Engine Coolant Temperature Sensor signal.
5 Oxygen Sensor.
6 RPM signal (Crank Angle Pulse).
7 Throttle Position Sensor signal.
8 Intake Air Temperature Sensor signal.
9 Vehicle Speed Sensor signal.
10 Starter signal.
11 Switch signal.
11 ECU/ECM.
12 Knock Control Sensor signal.
12 RPM signal.
13 Knock Control CPU (ECM).
13 RPM signal.
14 Turbocharger Pressure.
14 Ignition signal.
21 Oxygen Sensor.
22 Engine Coolant Temperature Sensor signal.
23 Intake Air Temperature Sensor signal.
24 Intake Air Temperature Sensor signal.
25 Air-Fuel Ratio Lean.
26 Air-Fuel Ratio Rich.
27 Sub Oxygen Sensor signal.
28 No. 2 Oxygen Sensor signal.
31 Air Flow Meter signal (Vacuum Sensor signal).
32 Air Flow Meter signal.
34 Turbocharger Pressure signal.
35 Turbocharger Pressure Sensor signal.
35 HAC Sensor signal.
41 Throttle Position Sensor signal.
42 Vehicle Speed Sensor signal.
43 Starter signal.
51 Switch signal.
52 Knock Sensor signal.
53 Knock Sensor signal.
54 Inter-cooler ECM signal.
71 EGR System.
72 Fuel Cut Solenoid signal.
78 Fuel Pump Control signal.
81 TCM Communication.
83 TCM Communication.
84 TCM Communication.
85 TCM Communicatio
1 Normal Condition.
2 Air Flow Meter signal.
3 Ignition signal.
4 Engine Coolant Temperature Sensor signal.
5 Oxygen Sensor.
6 RPM signal (Crank Angle Pulse).
7 Throttle Position Sensor signal.
8 Intake Air Temperature Sensor signal.
9 Vehicle Speed Sensor signal.
10 Starter signal.
11 Switch signal.
11 ECU/ECM.
12 Knock Control Sensor signal.
12 RPM signal.
13 Knock Control CPU (ECM).
13 RPM signal.
14 Turbocharger Pressure.
14 Ignition signal.
21 Oxygen Sensor.
22 Engine Coolant Temperature Sensor signal.
23 Intake Air Temperature Sensor signal.
24 Intake Air Temperature Sensor signal.
25 Air-Fuel Ratio Lean.
26 Air-Fuel Ratio Rich.
27 Sub Oxygen Sensor signal.
28 No. 2 Oxygen Sensor signal.
31 Air Flow Meter signal (Vacuum Sensor signal).
32 Air Flow Meter signal.
34 Turbocharger Pressure signal.
35 Turbocharger Pressure Sensor signal.
35 HAC Sensor signal.
41 Throttle Position Sensor signal.
42 Vehicle Speed Sensor signal.
43 Starter signal.
51 Switch signal.
52 Knock Sensor signal.
53 Knock Sensor signal.
54 Inter-cooler ECM signal.
71 EGR System.
72 Fuel Cut Solenoid signal.
78 Fuel Pump Control signal.
81 TCM Communication.
83 TCM Communication.
84 TCM Communication.
85 TCM Communicatio
04-15-15, 08:32 PM
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thanks.
Plugs, wires, rotors and caps are all new and there is spark across all cylinders. I just put in a new fuel pump and there is good pressure right at the engine.
I havent checked the sensors, but ecu is clean.
So now I am thinking it could be clogged cats causing no start? since just before it died I could hear the rattling in the exhaust
Plugs, wires, rotors and caps are all new and there is spark across all cylinders. I just put in a new fuel pump and there is good pressure right at the engine.
I havent checked the sensors, but ecu is clean.
So now I am thinking it could be clogged cats causing no start? since just before it died I could hear the rattling in the exhaust
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