2006 Subaru Outback - Manual jumpy throttle

Jan 4, 2023
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Hello everyone! I recently put a new battery in my 2006 Subaru Outback Sport (manual) and ever since the new battery has been in my throttle has acted jumpy/clogged.

If I switch to a new gear and it is low RPM's, my acceleration/throttle seems to be very jumpy. It seems like it is not getting a full load of fuel pumped into it consistently. After the RPM's have risen (1,500+), the throttle and acceleration goes back to normal. It does not happen every gear when the RPM's are low, but it happens quite often.

Does anyone know if this is an issue with my fuel line or something else? It does not change how the car drives at all, I just would like to figure it out before further issues occur. Thanks a bunch!
Try these steps and also follow the attachment:
1) You will need to scan and delete all faults first
With faults cleared, the ECM idle control is also cleared.
If you have SSM3 or SSM4, simply instruct the ECM to set the idle speed.
If there is no access to a factory style scan tool, you can recreate the proper conditions for the ECM to relearn idle control and the correct RPM to maintain idle speed under load conditions.
Load conditions include:
Cooling fans ON or OFF
A/C request
Power Steering load request
Transmission load request
Any electrical load request
1. Ensure all power accessories ie: lighting, heater and electrical parasites are OFF.
2. Disconnect the battery negative for 30 minutes.
3. Reconnect the battery negative.
4. Following all steps without touching any switches or pedals. Use the ignition key only.
5. Insert key to the ON position only for 20 seconds.
6a. Turn the key so that the engine starts.
6b. Set timer for 20 minutes.
6c. Let engine idle for 20 minutes.
7. Turn key OFF and leave the key in ignition for 20 seconds.
8. Remove the key.
9. Repeat step 5 and Continue to step 10a when complete.
10a. Turn the key so the engine starts and set timer for 10 minutes.
10b. Let engine idle for 10 minutes.
11. Turn the key OFF and leave key in ignition for 20 seconds.
12. Remove the key. The ECM has relearned idle speed.

Reset the clock, radio stations and electric window one-trip features.
At times, the memory electric seats and remote fobs may not operate.

Read and apply the attachment last if required.


  • Throttle relearn.jpg
    Throttle relearn.jpg
    87.4 KB · Views: 12
Once the noted adaptation has been performed, road test again and try to capture any fault codes.
As scan tool can indicate it the throttle pedal voltage is correct and sweeps cleanly.
Check / test the EGR system and look for any vacuum leaks. Replace the PCV valve and hose connection.
Inspect the air filter and housing for rodent intrusion and that it is clean.

That model can be scanned with a PC version of FreeSSM or Android with iOS versions.
At least you will have reliable diagnostics for this and future issues.

Free SSM 1.2.5 is PC based and working on older Subaru models without CAN, only K-Line.
Works with XP, Windows 7 and Windows 10. The application will access SSM full Engine and Transmission diagnostics.
Link: https://sourceforge.net/projects/freessm.berlios/files/latest/download
USB Cables used:
VAG-K + CAN USB (at times called KKL or K plus CAN)

Android Tools used:
JDMscan Application: https://play.google.com/store/apps/details?id=dksoft.jdmscan&gl=US
USB Cables used:
OR (FTDI) FT232BL USB with OTG cable if Android supported

ActiveOBD Application Android
Bluetooth OBDLink MX +

ActiveOBD Application iOS version
Requires high quality BlueTooth device

These tools mentioned are NOT OBD II, these applications are true SSM (Subaru Select Monitor)

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