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could be all manner of things, but i would start with the regulator/rectifier - get that replaced & work on from there, you could have seriously damaged the internal workings due to consistent jump starting, that should have been the time to ask what was going on , now you have just confounded the issue
I had this same problem my 1996 discovery . oddly enough lights came on bright etc i thought ok all electrical is good .. Nope , i jumped a pair of battery cables from the negative battery post to the bracket where alternator bolts on to a ground pretty much .. This problem went away completely.. So it was just a current issue wasnt getting enough to light those spark plugs my guess or the computer was doing something else whne it diditn see all the current it needed .. i have no idea but it fixed it
Check the basics, spark, fuel and compression. Make sure that your starter circut is recieving the battery voltage it needs to operate. The starter relay or igntion fuse maybe suspect as well.
First you need to find out where the problem is! Basically, you divide it up to three categories. Charging/starter; fuel system and engine. You need to start with the charging/starter category. Even if the engine turns over when you are trying to start the car suggest you try a jump start. If it won't start when you are jump starting it, then it probably isn't the battery or alternator but still could be the starter. If it DOES start, then the problem is either you battery or alternator or cables. Depending on what your indications are depends on what you need to do to narrow down the problem.
1. Clean the cables on the battery, even if they don't appear to have much corrision it doesn't take much to prevent the alternator from charging the battery at it's peak level. When you're finished try to start the engine.
2. If it still will not start, try to find someone to give you a jump. Even if it's cranking it may not be providing the minimum speed needed to allow the engine to start. Having atleast the Minimum, " Cold cranking amps ", required by your vehicle is crucial, especially in cold/cooler weather.
If the vehicle starts with a jump you likely have an issue with your battery. Many parts stores will hook up a diagnostic machine to check your battery, alternator, and some will also check the starter for FREE.
Proper way to jump your car is to attach the jumper cable clamps to the marked posts on your car...on the vehicle that is jumping you, attach the positive clamp to the positive post and the negative clamp to some piece of metal on the vehicle...can even be a screw as long as it sparks a little (grounding). Don't connect the clamp to the negative post.
Does it crank and not start or not even crank.
You could have a bad starter. I would test the battery first. When it won't start try to jump start it. If it jump starts it's probably the battery. If it won't jump start it's probably the starter.
i have a 201 ford excursion for about 2 weeks i could not get it to start in the mornings it was hesitant and would take about 4 tries before it would start. i took it to the dealer and they said the battery was fine i ended up changing all the spark plugs and ignition coils and now the car wont start at all.. please help if anyone knows what it could possibly be.
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