I have got a Ford KA; the battery kept going dead and so I got a new one. However since the new battery the engine keeps going out when I stop at junctions unless I can manage to keep up the rev counter.
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you mean the engine fan or the interior heater fan ? if the engine fan it must just be a coincedence or the fan was running on before, and you might not have noticed, and if you replaced the battery because it kept going flat the fan running on to long could be the reason ,the engine temp sender may be the fault as fan is designed to run on after engine turned off to cool down components,so i'd get the OBD codes read this will pinpoint the sensor/switch that is at fault, save you time and money,as a temp fix see if you can disconnect the wire to the fan when engine has cooled as the new battery will soon be toast , plug back in when starting engine again being carefull in case the fan cuts in straight away which would also point to temp sender switch, keep me posted if you wish
does the engine crank over. if it does, do you have both keys to the car,1 red 1 black the red one is the main key and is the master key if this dosent start the car then i would surgest the car imobeliser/alarm system fuse
I recently had the same complaint and after alot of trouble shooting I located my problem to be a wirring harnes conector on top of the engine for the injector pump moduel. The contacts looked real good however the theory is when they heat up they warp away from their mate and this activates the computor and keeps it from going into sleep mode thus draining the batteries. You could have any conector problem but I would look where the temperature changes the most. In my case I cut the conector out and soldered the wires together. My batteries seam much better now it has been 2.5 months which is a record for my batteries going dead.
Does it go dead after sitting for a few hours? Once started and driven for several miles will it restart if the engine is shutoff? If the battery goes dead only after sitting for a while with the engine off, you probably have a bulb or some accessory that is draining the battery.
The odds are the alternator is the problem again. I've installed brand new alternators in the shop that turned out bad. The battery barely had enough juice the crank the car and get it running. Then, the battery was the only thing keeping the engine running with the spark plug until the battery drain completely dead.
If the alternator was working normally, the alternator would have kept the energy up and keep the spark plugs going without the battery's help.
Basically, the battery's job is to start the engine only and the alternator's job is to keep the battery charged and supply energy for the car's needs.
keep in mind, your engine use both source of power to run, one from the battery and one form alternator. If the alternator is good, your engine should stay running regardless if the battery is good or bad, the alternator should keep the engine running. It sound like to me the alternator is faulty not charging your battery or keeping your engine running, even though the alternator is brand new does not mean is good. My guess I would take the alternator back and get another one. the reason why your car ran for 25 min and die it has no source of power to keep the sparks going although the alternator should keep the engine running and at the same time charging the battery but is not.