Strange hunting on evo 7 after jump start

[christian3po]

I left my interiour lights on the other day so battery was flat in the morning however it still had a bit of life in it. i then put my battery charger on it and "boost started" it. then this happened (watch video) i took it to my local garage who sugested i took battery off and hold both terminals together for a minute which i did and it cured the problem. Does anyone know why it did this ?? https://www.youtube.com/watch?v=3EvvONcJClg

 

[RsvRob]

It did that before you took terminals off??
Strange but if its all fixed then nothing to worry about

 

[christian3po]

yes i boost started it and it imediatly it started idling on choke at 3500rpm then dropped to 2000rpm . after 5 mins it started hunting. then i drove it 15 miles and it was still hunting. i then put batt terminals together for 1 min and it cured itself. my local garage said give batt terminals a try as on modern cars it something sometimes resets itself "Strange"

 

[2star]

It's to do with the idle control valve...when you disconnect the battery this re-sets it.

Mark

 

[Chris@epp]

After battery disconnect the car has to re-learn fuel trims etc... it goes through around 4 cycles (I believe),each around 5 mins... during this time the RPMs adjust whilst the ECU figures out what is what...

 

[fq-craigus]

My old type r done this after being say for few months, idle control valve was the issue but it sorted its self out, glad u got Urs sorted