Opend up the zed up this morning on the motorway didnt realise i was still in 4 i bounced it of the rev limiter in 4th then changed to 5th .When i pulled of the slip road a mile or so later i noticed it was running on 5 cylinder thinking id killed it ,when i noticed a coil pack plug had jump off put it back on all fine appart from high tickover .It aways idled fine before around 800 rpm now its 1500 even when hot any ideas thanks taff.:cool3:

have a go at disconnecting the TPS plug (not the one directly on it but, the one on the fly lead) for 15 seconds, then reconnect. see if that works :)

Just treid that revs rise too about 2000 rpm when unpluged then go back to the same 1500 rpm when pluged back in .Cleaned all plugs idle control valve ecu temp sensor unscrewed idle screw sprayed wd40 in there .I did notice the idle scew is all the way in .Treid adjusting idle with yellow plug out and it will only speed up the idle not slow it down .I took the idle control valve appaet last year and cleaned it maybe it needs a new one.Seems funny it was fine before i thrashed it.

temp sensor (ecu one) has been known to get blown off by the fan at high rpm if it has a faulty clip..check simple things 1st before you start changing idle speeds bud or you'll be chasing your tail

Most likely the fast idle valve has either come disconnected or is stuck open, check the connection if ok try tapping the unit with the engine ticking over, bet the revs will drop down when you do it, if so needs a clean out or replacement.

 

Jeff TT

Jeff, where is the fast idle valve located. mine does the same some times.

 

cheers Paul

thanks will take idle control valve appart tommorow and clean just wondered why my idle screw is so far in been told they should be about half way.

Ok as you having the problem occasionally I would definately check the fast idle valve as mentioned but also said check the tps connection too.

 

Have not got an actual picture to hand but just behind the balancer bar (number 30 in the picture)

 

Jeff

Is the fast idle valve the same thing as the idle control valve or is it the air regulator thing thanks.

Cleaned and took apart idle control valve today and air regulator cleaned all conections new ecu temp sensor still idle is at 1500 rpm .Is it posible that the idle control has packed up totaly .Given up with it now got it booked in at gbh motorsport tommorow hopefully they will sort it :mellow:

Sorted air reg fault and fitted 2 new nissan pipes idle is good now.:cool2: