Diagnosis help needed
Posted: Mon Jan 18, 2021 11:42 pm
I have a 2013 PCX 150.
After I pulled engine out and reinstalled it, I had a problem with it running.
The scooter seems lean when first underway. On the road it will stumble a little, and
under high throttle it will go dead at 55 mph. I turn the throttle back, and it returns
to normal operation.
It is consistent with fuel shut off and I get no pop from the exhaust, so I don’t think
the ignition is a factor. (Does the CPU cut off ignition when the fuel stops?)
Here are the codes from my PCX.
Intake air pressure sensor
Intake manifold Throttle potentiometer or short circuit to ground
Intake air temperature air circuit
Air temperature sensor open circuit
or short circuit to positive
Idle air control valve faulty
Crankshaft position sensor faults
I looked at the wiring diagram, and I couldn’t identify all the needed components. I
think that there is probably one thing common to all these items.
Installed a new Throttle Position Sensor, and road tested. No change.
Cleared all the codes.
Tested the fuel pump for quantity and pressure.
Installed a volt meter, and connected the wires to the pump. 14+ volts at all times
Pulled the fuel pump out, and examined the filter. O.K.
Examined the electrical connectors, and determined they are all well seated.
Sprayed carburetor cleaner on the fuel injector while running. No increase in idle.
An additional ground to the engine had no effect.
Have you ever experienced this issue? Suggestions?
Thanks.
After I pulled engine out and reinstalled it, I had a problem with it running.
The scooter seems lean when first underway. On the road it will stumble a little, and
under high throttle it will go dead at 55 mph. I turn the throttle back, and it returns
to normal operation.
It is consistent with fuel shut off and I get no pop from the exhaust, so I don’t think
the ignition is a factor. (Does the CPU cut off ignition when the fuel stops?)
Here are the codes from my PCX.
Intake air pressure sensor
Intake manifold Throttle potentiometer or short circuit to ground
Intake air temperature air circuit
Air temperature sensor open circuit
or short circuit to positive
Idle air control valve faulty
Crankshaft position sensor faults
I looked at the wiring diagram, and I couldn’t identify all the needed components. I
think that there is probably one thing common to all these items.
Installed a new Throttle Position Sensor, and road tested. No change.
Cleared all the codes.
Tested the fuel pump for quantity and pressure.
Installed a volt meter, and connected the wires to the pump. 14+ volts at all times
Pulled the fuel pump out, and examined the filter. O.K.
Examined the electrical connectors, and determined they are all well seated.
Sprayed carburetor cleaner on the fuel injector while running. No increase in idle.
An additional ground to the engine had no effect.
Have you ever experienced this issue? Suggestions?
Thanks.