E36 bmw 323, heavy surging on tickover when engine gets hot, then will not restart if turned off. Already fitted idle control valve, fault still apparent.
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start with the common things. You will be surprised with how clogged air filters can alter the peformance of your vehicle. I would start by checking air filters. when was the last time you serviced your e36? you might also need to check fuel pump pressure.
Replace resistor pack. a four prong thing. Google: resistor pack 3 series e36. When they go bad the fan only goes to fast mode and can blow the fuse. Check fuse, relay, but resistor pack 1st.
i have found 2 areas that cause issues such as you are reporting.
one is poor voltage. check the connection at the starter motor between the alternator and the battery.
the other and perhaps more likely is a wet ECU.
the ecu box is under the windshield on the passenger side, access under the hood. this are can get wet ad corrode an ECU.
remove the ecu, take the bottom plate off and clean any corri=oded and wet areas with alcohol and a tooth brush..be gentle.
i would look for a way of mounting the ecu so that it doesn't lay on a flat surface that gets wet...
ck for excessive play in the electric cooling fan blades - theses usually only come on when the car is hot or ac is used. You can also check this by locating the fan relay(s) and removing them when you hear the noise.
Is injectors clean. Perhaps dirt in fuel. replace fuel filter
Air leakage at top air intake of manifold at ICV idle control valve. Two hoses inside this housing prone to perishing.
Throttle position sensor faulty.
Mass air flow sensor faulty.
ICV faulty or dirty. comon fault on older e36.
Havent done it yet but ICV is easy to clean according to internet. instruction available at bmw e36 blog. All off above can be tested by yourself according to manual.
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