Volvo 440 idle problem
A few weeks ago on a cold morning the idle revs went down to about 500 then
up to 2000, and continued to pulse between the two. The problem went away
but has now reoccured, but as well as pulsing between 500 and 2000 rpm
it sometimes sticks at 2500 rpm. The engine is the 1.8 litre single point
injection unit, and after looking at the Haynes maual it appears to be the
B18U engine. Could it be the idle control motor?. any advice would be
Thankyou in advance.