| Senior Member Join Date: Nov 2003 Location: Walnut Creek, CA Posts: 642 |  Unstable Idle on warm/HOT days????
Anyone have this problem (M42):
On cool days car runs like a champ. When the weather is warmer or frankly hot, the engine obviously needs more cooling. What I have noticed, and it was pretty bad today, is that when the electric cooling fan kicks on, the electric drain from the fan causes the engine to stumble, but not stall and the ICV compensates for the dip in RPM and brings the engine speed back up to normal. I'm guessing the alternator is called into action to drive the electric fan motor, increasing parasitic drag on the motor. I just wouldn't expect it to be so pronounced and annoying. There have been a handful of times when the car has stalled, but the A/C was on and I was turning and using the power steering.
Anyone think it's a bad alternator? bad eletric fan motor? ICV? __________________
'95 330ti CS w/sr delete, S50USB30, cams, 24# inj, Conforti SW, Euro HFM, Samco Silicone Intake Boot, BBTB, Euro Oil Cooler, JTD CAI Duct, RE DMS exhaust, RE Tranny mounts, CF Valve Cover, LTW flywheel/Kevlar sprung hub clutch, RE SSK, 3.46 Finned LSD (M6) , M3 tranny, Brembos, RE Wheel Studs, SS brake/clutch lines, CF interior, Rear Headrest retrofit, Tilt Steering retrofit, 13.5 lb DynaBatt in rear, LED interior/footwell lights, ZKW HID, Headlight Aim Control, Rear fog light w/cluster indicator, CF 3 Aux gauge pod, BMW Traffic Pro/Alpine MP3-CD Changer, Staggered LTW wheels, '95 M3 steering rack, VIS CF Hood, M3 LTW Strut Bar, TCK SA coilovers, Red LTW Motorsport Seatbelts, OEM Fire Extinguisher, Z8 Starter button, Auto dim rear view mirror w/ Homelink/Compass, PDC, Rear Sun Shade, Euro Gauge Cluster w/oil temp/shift light , Headlight Washers, "Motorsport" Door Handles, CF Grills, French ZKW Fogs, Euro dash bins, Power Lumbar Support is next, Coming e39 M5 interior light, Bimmer Magazine 8/2007 |