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3

Yes, it is normal. The ac requires some 10 to 12 bhp from the engine and the ecu is allowing for that energy demand by increasing the idle speed so it will not stall.


2

Your car has an electric fan at the radiator and the fan didn't engage when it had to. Or it didn't engage its higher speed when it had to. The result: your engine mildly overheated. What you have to check: Why the fan didn't start? Loose wirings, burnt fuse, dead relay(s), whatever? Signs of oil or coolant leaks. Signs of oil in the coolant or coolant in ...


2

What happened exactly? Was it that keeping it on 4000 rpm for 5 minutes caused overheating and this had nothing to do with the connected battery, or did battery have something to do with it? You were holding the engine at (relatively) high RPM for a sustained period of time with essentially no air flow over the radiator. That being the case it was going to ...


1

I'd like to respond to #2 and #4. The problem is likely poor combustion due to carbon deposits on the intake valves, spark plugs, fuel injectors and inside the combustion chambers. It is a very common problem with the GDI fuel system on your vehicle at that km's. I had exactly the same problem with two new cars with approximately the same km's (Jeep ...


1

A dirty throttle body can cause these symptoms. It is best to have it removed for cleaning. It is not possible to do a sufficient job without doing so. You can remove the throttle body and remove the sensors attached to it so they are not damaged by the cleaner. Then it can be cleaned with a can of throttle body cleaner and clean cloth. If it has electronic ...


1

when the explosion in the chamber occur producing power this power appears as an increase in torque and RPM No. Combustion only creates torque. If this torque is greater than the counter torque created by internal friction, (air) drag and the slope of the street, then the car will accelerate, and RPM will rise. If both are equal, the speed / RPM stays ...


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