440 B18U wont start

shak850 · Sep 21st, 2009, 13:13

the engine will not start unless i use the throttle and does not idle untill its warm. I hope someone can help

GTMaster · Sep 21st, 2009, 20:33

I'd first read for any fault codes. It might be either the motor temperature sensor or air temperature sensor. But it'd probably be the idle control valve. Could be just dirty and needs cleaning.

Martin Cox · Sep 21st, 2009, 20:50

I'd suspect the idle stepper motor has stopped working and has stuck in the warm engine position. Sometimes they stick in the cold position, in which case the engine starts normally when cold but races once it has warmed up.

This is a stock fault with the B18U engine. I had two strepper motors replaced on mine. It's not a difficult job to swap them. Sometimes they may respond to the connections being cleaned and if you are careful, they can be dismantled and cleaned internally but it doesn't always work.

Hope this is of some help

Martin

Sep 21st, 2009, 13:13	#1
shak850 New Member Last Online: Sep 22nd, 2009 19:55 Join Date: Sep 2009 Location: bath	440 B18U wont start the engine will not start unless i use the throttle and does not idle untill its warm. I hope someone can help

Sep 21st, 2009, 20:33	#2
GTMaster Senior Member Last Online: Nov 7th, 2016 22:32 Join Date: Sep 2008 Location: Melbourne	I'd first read for any fault codes. It might be either the motor temperature sensor or air temperature sensor. But it'd probably be the idle control valve. Could be just dirty and needs cleaning. Last edited by GTMaster; Sep 21st, 2009 at 20:47.

Sep 21st, 2009, 20:50	#3
Martin Cox VOC Member Last Online: Today 12:09 Join Date: Dec 2001 Location: Hull	I'd suspect the idle stepper motor has stopped working and has stuck in the warm engine position. Sometimes they stick in the cold position, in which case the engine starts normally when cold but races once it has warmed up. This is a stock fault with the B18U engine. I had two strepper motors replaced on mine. It's not a difficult job to swap them. Sometimes they may respond to the connections being cleaned and if you are careful, they can be dismantled and cleaned internally but it doesn't always work. Hope this is of some help Martin

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