Proton Recent Questions, Troubleshooting Help & Support

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A faulty sensor, an intermittent misfire it needs to go on a scantool to see what the fault codes are, then it can be worked out what the fault is...

p0121 is a generic code for throttle position normally its the throttle cable adjustment or the the sensor on the throttle body

the synchro dog is not staying engaged for several reasons worn teeth on the dog, , worn inlet shaft bearings , gear not going fully into gear from incorrect selector adjustment

You'll need a brake piston wind-back tool, Sykes Pikvant make them, can be bought from most automotive parts stores

Most Proton Gen2 cars have disc brakes on their rear wheels. These disc brake pads are shared with the handbrake. The handbrake, as with the "regular" brake on these rear wheels, are self-adjusting.

It certainly could be, but I wouldn't jump to that conclusion so quickly. Leave such diagnosis' to the pros, who often zero in on the most expensive component without proper troubleshooting.Typically, troubleshooting would start with seeing if you can get a spark at the spark plug. Then work back from that (assuming the starter is turning the engine over properly). This means spark plug, leads, disributor cap, distributor rotor, electrical continuity to the distributor and coil. About the last thing on the list is the (expensive) ECU.

wreckers /junk yards engine re conditioners , genuine spares or auto spares shops might even get after market units from e-bay

Not familiar with this car, but first you have to find the power wire to the switch-that will be one end of your jumper wire. Use a test light clipped to ground, turn key to on, and probe all the wire cavities till you find the hot wire to switch. Now pull out on the electrical connector and see if you can see the two wires going down to driver's door motor. Then see where they connect to the connector. When you touch the jumper wire end to one, it will be for either up or down, and the other motor wire when connected to hot jumper wire will be the opposite, either down or up. If window is all the way up, jumping hot to up side will make no noise, and cause nothing. So you try the other motor wire to see if motor makes window go down. See, you have to jump hot wire to both to verify the motor works or not.