Not sure its the battery, its not old battery. The temp. outside doesn't seem to matter it sometimes starts when its real cold or don't start when the temp. is moderate. I guess it could be the starter.
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Is your Battery good or bad?
Sometimes a battery seems ok then later it seems dead. sometimes it charges and then it won't take a charge. This keeps going on and doesn't really seem like the battery is bad. This is a common problem happening to everyone at times.
Could be a dead cell in the battery, try measuring each cell in the battery. If one cell is low it will seem like a dead battery. But the battery really needs to be replaced. The debris in the bottom of the cell is intermittently shorting the cell.
in cold weather diesel gels up and sometimes causes a no start issue..a cetane fuel additive helps with this issue. if temps go below 20 degrees, add a quart per tankful of cetane to the fuel to help start on cold mornings. also diesels require more amperage to crank than gas engines do..thus a stronger battery is needed..
Did you manage to solve your problem?
I have a X5 with the same engine that cranks but doesn't start. Only occurs when car as been up to temp & then left until temp gauge shows approx 1/4. 5-10 minutes later starts fine???
Your first problem is to find out why the intermittent no-power problem. Honestly, that sounds like a loose conmnection somewhere. check all your grounds for clean and tight conditions Also, battery connections and alternator connections. Double check your power distribution center for any loose wires or poor connections. Once you solve that problem, then you can diagnose the other problems with poor idle and temp. gauge.
How old is the battery? The extreme heat of summer and the extreme cold in winter take a toll on batteries often causing intermittant starting problems if the battery is four years old or more, or if it is a cheapo battery that is a few years old that is probably the problem.
Its not the oil, increasing temperature will thin out the oil. If it cranks easily but won't start it could be the spark plugs or the spark plug wires. When they heat up, especially if they are old, they won't perform well. Pull off one of the wires and hold it close to the plug, try to crank the engine and look for a spark. If it sparks them try removing a plug and check to see if it looks wet. If its bone dry it might not be getting fuel.
The most common problem that causes this that i can think of is a detective pick-up coil in the distributor.Remove the cap and rotor button and then the plate that is under where the rotor button was,there you will find the pick-up coil and the reluctor wheel that makes it work.These will go open when warm periodically and can easily be overlooked,the ignition coil could also be the problem as well as the ignition module but the pick-up is the most common.
Try pulling the engine coolant temp sensor, They often crack not sure
why but the ceramic tip cracks makes the car hard to start, the car's
idle may race while shifting gears, and often smokes. The sensor is on
the right side of the engine when looking at it on the head. Easy to
change and get too