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Showing results for tags 'radiator fan'.
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Hi guys I have a really confusing problem. During long drives, after my engine warms up my fan goes crazy to the point my side mirrors shake. Yet according to my thermostat my car is perfectly fine and has never overheated. I even did a complete cooling system flush. Where I used a hosepipe to flush and back flush my radiator and engine block until clear water ran out on both directions, added some wynns cooling system flush with distilled water and drained the mixture after 10 minutes of idling, added the proper coolant and changed the thermostat. I can 100% confirm that my cooling system is perfect yet still, during long drives my fan goes crazy. Is it an electrical fault of my fan or is my engine actually overheating? My engine sounds perfectly fine although due for an engine oil change. If I told you how my problems started it’ll be even more baffling. It started when I filled up a tenners worth of asda brand petrol from a near enough empty tank. A day later, I’ve been getting ignition problems, rough idle, engine knock and my FAN GOING CRAZY. After checking my manual I realised that the ASDA brand petrol had to have a lower octane rating and poor quality and was the cause for it (yes, the manual warns that petrol with crappy additives will cause those problems). I immediately then slapped in a full tanks worth of some shell v power which cured all the symptoms but the CRAZY damn fan. What could be the problem guys? An electrical fault or my engine oil or god forbid, some nasty souvenir left by the Asda petrol?
So I've recently found out my cooling fan doesn't come on high speed when the coolant gets hot unless the aircon is on, so the fan works on both high and low speed when the aircon is working, is this likely to be the fan control module at fault? Thanks in advance, Michael.