Revs drop down to the point of switching off

[johnmuchiri]

I have a jdm 2007 subaru legacy 6mt

so i had disconnected the battery for like 10min then connected again and this happens.

when slowing down in a traffic jam, after pressing the clutch revs drop till it switches off. whenever the engine isnt connected to gearbox revs drop and car goes off if its in motion or coming to a stop. but at start up (hot) the revs go up then drop below idling as if switching off then they bounce back to normal idling position. this problem wasnt there before diconnecting the battery. if anyone has ever experienced this or knows the solution, please help.

[Andy_Mac]

Normally have to remove the battery for alot longer than 10 mins with these cars to lose the idling memory but may be the case. Turn it on and let it idle for 10 mins or so without touching the throttle ar all. It'll sound like its gonna stall but leave it to do its thing. How long ago was the battery removed?

[johnmuchiri]

3 weeks ago, but returned it and traveled the same day. No one is using it at the moment. Going back next week

[Kiwi_Fozze]

Do you have a venting bov installed?

[johnmuchiri]

No, am as stock as they come

[Joker]

what was the battery disconnected for?

/ what did you touch last

[johnmuchiri]

I was traveling and didnt want my battery to drain, so i disconnected. Immediately i had an errand to run so i connected and thats where everything started....i didnt touch anything else

[Andy_Mac]

Definatey sounds like it needs to relearn its idle. The ECU doesn't normally forget it that quickly in newer cars but thats all thats been touched

[B4 I was 250T]

IACV??

[Andy_Mac]

 B4 I was 250T said:

IACV??

Don't have one with the electronic throttle models.

[johnmuchiri]

I think the car is learning, the revs are dropping but not to the point of switching off