idle speed

[richardhew]

my evo 7 has started ticking over between 1500 revs and 2000 up and down constantly, can someone help me, it is embarrasing sat at traffic lights people think im reving at them :hm: can someone please help

 

[m7gsr]

Prob your idle control valve or an air lock in radiator

 

[RsvRob]

Has the battery been disconncted recently?

 

[richardhew]

where is the idle controll valve and how would i fix it and how would i know if there was an air lock in the radiator thanks

 

[richardhew]

no the battery has not been off for a while thanks

 

[micevo]

clean the throttle body, then do the idle reset, disconect battery for a short time, reconnect, leave tickin over for 10 mins, then put lights aircon etc on leave for another 10 mins, that might help,
or check for air leak

 

[RsvRob]

no the battery has not been off for a while thanks

Or has the battery died and you've had to recharge it?

This would meen the base idle would need reseting. If not then the idle valve is possibly stuck and needs cleaning or replacing.
It could also meen you have an air leak somewhere. Best to try and get the base idle reset 1st
1.Disconnect battery for few minutes
2.Start car with no electrics on at all, NO radio, lights, heated window, climate control, etc
3.Leave it running for 10 min
4.After this time turn on all electrics
5.Leave for further 10 min
6.After all this take car for a drive

This should reset the base idle to 1400rpm on start up and 850rpm when warm

 

[RsvRob]

clean the throttle body, then do the idle reset, disconect battery for a short time, reconnect, leave tickin over for 10 mins, then put lights aircon etc on leave for another 10 mins, that might help,
or check for air leak

Damn you mic beat me to it while I was writing it lol

 

[fq-craigus]

Has the car been sitting for a while?

 

[micevo]

lol!! you ok then rob?

 

[RsvRob]

Not bad fella. See the 6 has gone now.... How's the 4?

 

[micevo]

4s gathering dust lol, gotta couple of track days comin up, so that be good, yea sold 6 next day, got myself a nice big 4.7 v8 to play with at moment lol...