328i on a 1995 bad/lumpy tickover when warm

Question

I have a 1995 bmw coup 328i and the tick over is really bad when the engine warms up (even cuts out when i am at traffic lights) I have put on a second hand air flow meter and the old air filter box but I still have the same problems (when engine is warm the tickover is low and goes up and down and cuts out) please help

ps I dont think its the air flow meter as the problem still happens with either meters on)

Answer 1

Air leaks in the vacuum system or air in the cooling system open the bleed screws on the radeator to see if air or bubbles form around the bleed s***w.AS for air leaks in the  system check the pipes around the engine for breaks or cracks or holes

hope this helps

Answer 2

could be electrical - your fuel is much leaner when warm and needs a good spark.  Or - sometimes, if your coolant is really low the temp sender can be out of the flow and gives a bad signal causing crummy idle...  More than likely a fuel/spark problem though when you're off "choke".

Answer 3

I suspect it may be one of the ignition coil units. Disconnect the plug leads one at a time; If the engine tone doesn't change, that's the faulty one.