Hi All
Update after my last post.
Elgrand with high idle surging from 1800 to 2300 RPM.
Tried with NDS11 app. This worked on other Elgrands I had in the past but after several attempts it would not have it this time. I guess the very high idle and surging issues were too much for the app. It kept saying ECU Busy and eventually failed to execute and adjust the idle to the normal 650 RPM.
Tried the pedal dance as mentioned here several times with all conditions met, Engine warmed, Front Wheels straight, Electric loads off etc. but no luck.
The procedure below I think is the correct one AND worked first time I tried it.
TOOLS NEEDED: stopwatch or timer showing seconds.
I used stop watch on my phone
1. When engine COLD, first perform the Accelerator Released Position and then the Throttle Valve Closed Position procedure. as mentioned above
2. Warm up engine at this point. I drove around for a bit less than 10 minutes despite somewhat high base revs in drive.
3. Car in Park, turn off all electrical powered stuff, wheels turned straight.
4. Turn key OFF and wait at least 10 seconds.
5. Turn key ON (not ignition) and start stopwatch at same time.
6. When stopwatch is at 3 seconds, press & release accelerator pedal 5x hard and quickly.
7. When stopwatch is at 15 seconds, press accelerator pedal and keep it down.
8. Approx when stopwatch shows 27 seconds, the solid CEL goes out then starts blinking. Keep the accelerator down. If the CEL never starts blinking, then something is not working and you'd better start over again.
9. When the CEL becomes solid again (stops blinking) about 10 seconds later, immediately start the engine and let it idle. It will still likely be a high-rev/pulsating idle.
10. Let it run for about 20 seconds and rev the gas a few times.
11. With foot on brake, shift into Drive. Idle will now go WAY down under 1000rpm. Shift to Park again, and the car will find its regular idle speed, and purr like a rather quiet kitten again.
I hope this helps someone with idle problems.
Update after my last post.
Elgrand with high idle surging from 1800 to 2300 RPM.
Tried with NDS11 app. This worked on other Elgrands I had in the past but after several attempts it would not have it this time. I guess the very high idle and surging issues were too much for the app. It kept saying ECU Busy and eventually failed to execute and adjust the idle to the normal 650 RPM.
Tried the pedal dance as mentioned here several times with all conditions met, Engine warmed, Front Wheels straight, Electric loads off etc. but no luck.
The procedure below I think is the correct one AND worked first time I tried it.
- ENGINE COLD
- Perform "Accelerator Pedal Released Position Learning" .
- Make sure that accelerator pedal is fully released.
- Turn ignition switch “ON” and wait at least 2 seconds.
- Turn ignition switch “OFF” wait at least 10 seconds.
- Turn ignition switch “ON” and wait at least 2 seconds.
- Turn ignition switch “OFF” wait at least 10 seconds.
- WAIT over 10 seconds before this next step.
- Perform "Throttle Valve Closed Position Learning" .
- Make sure that accelerator pedal is fully released.
- Turn ignition switch “ON”. WAIT EXACTLY ONE SECOND SHARP. Turn ignition switch “OFF”
- THEN wait at least 10 seconds.
- Make sure that throttle valve moves during above 10 seconds by confirming the operating sound. - Very hard to hear anything at all. Just believe this is happening by faith.
TOOLS NEEDED: stopwatch or timer showing seconds.
I used stop watch on my phone
1. When engine COLD, first perform the Accelerator Released Position and then the Throttle Valve Closed Position procedure. as mentioned above
2. Warm up engine at this point. I drove around for a bit less than 10 minutes despite somewhat high base revs in drive.
3. Car in Park, turn off all electrical powered stuff, wheels turned straight.
4. Turn key OFF and wait at least 10 seconds.
5. Turn key ON (not ignition) and start stopwatch at same time.
6. When stopwatch is at 3 seconds, press & release accelerator pedal 5x hard and quickly.
7. When stopwatch is at 15 seconds, press accelerator pedal and keep it down.
8. Approx when stopwatch shows 27 seconds, the solid CEL goes out then starts blinking. Keep the accelerator down. If the CEL never starts blinking, then something is not working and you'd better start over again.
9. When the CEL becomes solid again (stops blinking) about 10 seconds later, immediately start the engine and let it idle. It will still likely be a high-rev/pulsating idle.
10. Let it run for about 20 seconds and rev the gas a few times.
11. With foot on brake, shift into Drive. Idle will now go WAY down under 1000rpm. Shift to Park again, and the car will find its regular idle speed, and purr like a rather quiet kitten again.
I hope this helps someone with idle problems.