E30 Zone

the last two days in the morning the m20 2.5 has been a bit rough it idles a bit high and drops when you press the throttle and sort of splutters till you get to 2000 rpm and its better, only lasts about 5 mins worth of driving and its fine could it be the idle control valve any help cheers

i had this problem with mine, although it was an m40. i assumed it was just an old car, taking a while to warm up, but if it has just started to happen on yours id be interested to find out what the cause is.

yeah it has just started its not done it before

blue temp switch mate ! it tells the ecu the engine is cold and givves the correct amount of fuel

where would i find this is there another name for it cheers

you have got 2 plungs/switches on the thermostat housing mate... follow you rads top house.. on switch is brown, the other is blue... they are screwed into the thermostat housing with a 19mm spanner.. make sure the engine is cold when you unscrew it.

could this also be the reason for the engine running rich?

yep !...

Think i may need one of thies. do we know the part nomber?

http://www.realoem.com/bmw/showparts.do ... g=11&fg=35

thank you. seen this site so many times and naw i have finaly bookmarked it.

good man... can come in handy

I am also occasionally rough and idle in the morning

blingsta you was spot on mate i disconnected the blue plug while it was running and it settled down smooth off to bmw now cheers mate

where is that on the m40 316 engine? Mine has exactly the same symptoms, rough idle for 5-10 mins and running rich.