Question about 1988 Daihatsu Charade

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Low idling on daihatsu charade 83 model

I have replaced the timing belt, set valve timing and ignition timing. starts but idles unevenly with foot on accelerator. does not want to accelerate. please assist

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  • jlgilfellow Oct 13, 2008

    the car have been serviced and the top gasket replaced. we also replaced the cam belt. after reassembling everything i made a mistake with the wire going to the carb and the condensor. i swoped the wires and when i started the car, smoke came out. whein i checked the wire leading to the distributor was burnt. i replace the condensor and after that the car does not idle when i start up. i have checked and everything is in its place and the gap on the points is also correct.

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My first thouhts are your ignition is still your problem, but upu haven't made it clear if the problem exists only when the engine is cold.

On the Charde you must push the pedal down before pulling the choke lever for the choke and fast idle linkages to engage... then start the engine.

The idle circuit consists of an emulsion tube and a solenoid. The solenoid is on the back of the carby and has a green wire running to it. If there isn't 12 volts on this at startup you wont be able to get the engine to idle without pedal assistance.

The carburettor also has an acceleration plunger that squirts a shot of fuel into the engine when trying to increase speed. This has a concetrina boot that can leak. It is situated on to op the carby.

The vacuum hoses need to connected correctly, especially one of the distributor hoses. That one must be connected to AD port on the carby. The following diagram is one of my modified layouts, but should work satifactorily. It is configured so that you can set the ignition timing a little more advanced than factory. When you set the timing make sure both hoses to the dizzy are removed and blocked. You adjust the dizzy position until the dimple on the flywheel lines up with the notch in the timing plate above.

Diagram here

For a test try blocking the hose coming from the oil cap to the bottom of the carby. The cap is also a PCV valve and if it's not clean it can allow excess air into the engine at idle.

My feeling is your points gap is not correct. It should be about the thickness of a hacksaw blade when open. The rubbing block on the points is notorious for rapid wear if hi temp grease hasn't been applied to the rotor lobes. A small gap will cause arcing under load and not provided sufficient dwell time for the coil to charge, resulting in a weak spark, missing, over fueling and lack of acceleration.

I also recommend you replace the plugs with Bosch Super 4's. They will last you a very long time and tend to be very forgiving with older worn engines.

Posted on Oct 11, 2008

  • ChasDaihard Oct 14, 2008

    OK if i understand it correctly, you joined the wire from the coil to the fuel cut solenoid and joined the wire that should have gone to the fuel cut solenoid to the dizzy?



    If so you would would have put 12 volts across the points, effectively shorting to ground everytime the points closed. I am suprised you didn't blow the 15 amp "engine" fuse.... have you checked this? If ithe wire has burned insulation in the engine bay, it's probably burned in the harness also and may have heated up the fuse terminals too.



    Try unplugging the green wire on the carb and see if there is 12 volts when you have the ignition keyed to on.

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Tip

How to reset ECU,Throttle and Accelerator Position Learning


Hi.

Below the procedure to reset ECU,Throttle and to perform Accelerator Position Learning on Nissan. It works on Titan, Altima, Infinity, pathfinder and other models.

ECU Resetting


While performing the procedures below, ensue that you are respecting the times stated. If the steps are not done within the specified times, the module will not reset. You will need to use a watch or a chronograph while performing the procedures.

Procedure:

1. Ensure that the accelerator pedal is fully released, set ignition switch to the “ON” position, then wait 3 seconds.
2. Follow the steps a and b below, repeat the two steps in sequence quickly for five times within 5 seconds.
a. Push hard the accelerator pedal untill fully depressed.
b. Release the accelerator pedal in full.
3. Wait 7 seconds, then depress the accelerator pedal completely, and hold it for about 10 seconds until the CEL (check engine light) starts blinking.
4. Release the accelerator pedal while the CEL is still blinking.
5. Wait 10 second.
6. Depressthe accelerator pedal in full and hold it for 10 seconds or more.
7. Fully release the accelerator pedal while the CEL light keeps flashing.
8. Turn the ignition switch to “OFF” position and start the vehicle. If procedure has been done correctly, then the light light will turn off.
If the light continues to stay on, repeat the procedure.

Accelerator Pedal Release Position Learning

Procedure

1. Ensure that the accelerator pedal is completely released before starting the procedure.
2. Turn the ignition switch “ON” and wait at least 2 seconds.
3. Turn the ignition switch “OFF”, and wait at least 10 seconds.
4. Turn the ignition switch “ON” and wait 2 seconds.
5. Turn the ignition switch “OFF” and wait 10 seconds.

Throttle Valve Closed Position Learning

Procedure

1. Ensure that accelerator pedal is completely released.
2. Turn ignition switch to the “ON” position.
3. Turn ignition switch to the “OFF” position and wait at least 10 seconds.
Ensure that the throttle valve moves after turning the switch off.

Idle Air Volume Learning (Throttle Position Learning)

Procedure

1. Follow the Accelerator Pedal Released Position Learning described above.
2. Do the Throttle Valve Closed Position Learning also described above.
3. Start the engine, and allow warming up.
4. Turn the ignition on “OFF” positionand wait 10 seconds.
5. Ensure that accelerator pedal is fully released, then turn the ignition switch to “ON” position, and wait 3 seconds.
6. Repeat the steps a and b below five times within 5 seconds in sequence.
a. Push hard the accelerator pedal untill fully depressed.
b. Release the accelerator pedal until reaching full extension.
8. Wait 7 seconds or more, depress the accelerator pedal completely and hold the pedal down for about 20 seconds until you see that the Check Engine Light stops blinking and starts getting steady..
9. Rrelease completely the accelerator pedal within 3 seconds after the light coming ON.
10. Start engine and let it run at idle for about 20 seconds.
12. Test the engine to ensure the idle speed and ignition timing are set correctly.

Regards.

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