1998 s-10, this problem just started a week ago. It won't start sometimes and without doing anything to it, it starts. I've changed the coil, coil wire, cap, rotor, and fuel pump. It is definetly an electrical problem before the coil. I put a test light to the power going into the coil and I have power, when I crank the engine over I lose power to the coil, but when I stop cranking the power comes back, but if the power stays to the coil, it starts. I'm at a loss???? Any ideas?
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If you can not duplicate the problem on demand, it will be very difficult to find and know that it is fixed. Do you know if you have lost spark to the plugs or fuel to the injectors when it is hard to start ? There is a long list of choices, including a faulty relay, fuel pump, ignition module, coil, and so on. You have to know if it is a fuel or ignition problem to proceed.
Hi,from the clues you give I guess that the starter motor is in need of a service (worn brush gear) I presume that when it does not start that the engine does not make a cranking noise. If the engine is cranking but failing to fire up, then it could be anything from the fuel pressure pump to the engine control system. there is a lot of clever stuff going on when you start your engine. Some simple things you should try first. Check visually that all vacuum hoses and wiring is secure and in good visual order( dodgy looking wires are prone to intermittent failure!... Do this next time it fails to start and recheck after gently adjusting ? wd 40 may ease problem temp. Also check service of spark plugs especially correct gap. Make a note of engine temp/ and air temp. loose wires are usually more loose in cold mornings!.. starting enrichment may not be sufficient with a wide plug gap. Check battery for full power output on starting. will it pull the car on the starter /
This could the problem with battery getting drain even if your car is parked , this could the problem in the wiring or the grounding in the car ,first check if any lights or the cd player has the power even if the car is parked ............................