Idle (hunting)

keithst24 · 5th September 2018, 19:04

My 1.8T is hunting a little on idle, revs go up and down between 600 & 800 RPM, I have changed plugs and the IMG any ideas?

Could it be the idle sensor ?

Good news is the refurbed Turbo has sorted the smoke

Thanks Keith

marinabrian · 5th September 2018, 19:09

The engine adaptations need to be reset, followed by the IACV being setup correctly on T4 Keith

Brian

keithst24 · 5th September 2018, 19:21

Quote:

Originally Posted by marinabrian

The engine adaptations need to be reset, followed by the IACV being setup correctly on T4 Keith

Brian

Cheers Brian

, I will be popping to Chris in Fareham soon I will ask if he can do that for me.

planenut · 5th September 2018, 19:31

I had similar symptoms on my 1.8T and that was solved by changing the idle air valve, nothing done with computers, did the five throttle pedal pushes and it's been fine since.

suzublu · 5th September 2018, 19:37

Welcome to 1.8 ownership

All easy fixes though

keithst24 · 5th September 2018, 20:17

Quote:

Originally Posted by planenut

I had similar symptoms on my 1.8T and that was solved by changing the idle air valve, nothing done with computers, did the five throttle pedal pushes and it's been fine since.

What the five pedal thingymebob

suzublu · 5th September 2018, 21:08

Quote:

Originally Posted by keithst24

What the five pedal thingymebob

If you find the tickover too fast or hunting, engine off, key to position 2, press the pedal 5 times quickly, ignition off, then restart the car.

keithst24 · 6th September 2018, 05:20

Quote:

Originally Posted by suzublu

If you find the tickover too fast or hunting, engine off, key to position 2, press the pedal 5 times quickly, ignition off, then restart the car.

Thanks Ronnie, I will try that

stevestrat · 6th September 2018, 08:31

Quote:

Originally Posted by marinabrian

The engine adaptations need to be reset, followed by the IACV being setup correctly on T4 Keith

Brian

Not long after getting the 1.8T I went down to Brian's. He discovered the stepper motor had never been adjusted, adjuster screw still had the sealing cap on it! He'd never seen one so far out of spec. The stepper motor adjusts the idle speed depending on any load on the engine, air con, lights etc.

planenut · 6th September 2018, 09:27

Keith, was it running alright up until recently?

5th September 2018, 19:04	#1
keithst24 This is my second home X Power Grey MGZT 180+ Auto... Bumble & 1.8T Odessey Rover 75 Contemporary SE manual Join Date: Nov 2015 Location: Reigate Posts: 5,375 Thanks: 2,254 Thanked 1,801 Times in 1,403 Posts	Idle (hunting) My 1.8T is hunting a little on idle, revs go up and down between 600 & 800 RPM, I have changed plugs and the IMG any ideas? Could it be the idle sensor ? Good news is the refurbed Turbo has sorted the smoke Thanks Keith __________________ [SIGPIC][/SIGPIC] Bumble Membership Number 35478 Born Monday, 16th June 2003 @ 14:30:35 This vehicle was the 9,196th ZT to run off the production line, out of 18,894 This vehicle was the 576th ZT 180 + to be made out of 828 This vehicle was the 871st ZT in XPower Grey (code: LEF) to be made out of 3,143 XPower Grey ZTs

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5th September 2018, 19:09	#2
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	The engine adaptations need to be reset, followed by the IACV being setup correctly on T4 Keith Brian

5th September 2018, 19:31	#4
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,947 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	I had similar symptoms on my 1.8T and that was solved by changing the idle air valve, nothing done with computers, did the five throttle pedal pushes and it's been fine since.

5th September 2018, 19:37	#5
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,906 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Welcome to 1.8 ownership All easy fixes though

6th September 2018, 09:27	#10
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,947 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	Keith, was it running alright up until recently?