Car wont start for days,no spark then will run normaly for days have changed crankshaft sensor begining to wonder if it something to do with chip in key.it turns over ok but no spark,then you can try an hour later and it starts normal.
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Consider replacing the crankshaft positioning sensor. A crank sensor is an electronic device used in an internal combustion engine to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control ignition system timing and other engine parameters. The simplest and most obvious symptom of a failing crankshaft position sensor is the blinking "check engine" light in your car.
According to Do It Yourself.com "When the crankshaft position sensor begins to fail, the signal it transmits to the vehicle's computer begins to weaken. If left unattended, the signal will switch off completely. This, in turn, causes the car's spark plugs to die out, killing the engine. If you are having problems starting your car, it could indicate bad crankshaft position sensor".
Of course this may NOT be YOUR problem, but it sounds like it could be, doesn't it?
check ignition S.w . check fuel pump. some time reading coil if getting hot it will not start make sure this happend when engine hot . but if when cold engine you have fuel pump or ignition S.W
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