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View Full Version : Still sputter sputin 1991 e32 735i with strange idle



Kibokojoe
12-28-2016, 04:33 PM
Still having problems with this 1991 e32 735i. It is idling up and down.
I have tested:
New O2 sensor
Full charge on battery
Spark plugs
rotor and rotor cap
vacuum leak
throttle body
Smoked intake no leaks
afm
fuel pressure
Clamp off evap system

I have attached a link to the video.
http://vid273.photobucket.com/albums/jj225/kibokojoe/1991%20e32%20735i%20funny%20idle.mp4

BigKriss
12-29-2016, 05:22 AM
leads / ignition wires?

shogun
12-29-2016, 06:39 PM
That really sounds strange. Have you checked the fuel pump? Maybe it is going to die? At least you can check the volume like this http://bmwe32.masscom.net/sean750/fuel_pressure_regulators/FuelPressureRegulators.htm
Nominal data:
The M30 fuel pump is originally Bosch 0 580 464 995
operating pressure is 3 bar
conveying capcity at 12 V 1.9 liter/minute
conveying capacity against counterpressure 875 ccm/30 seconds
Power consumption is 5A