New starter and Battery but wont start - 1998 Mercury Mountaineer

car wont crank or car wont start? I would say your battery cables are bad,, acid gets in from battery and erodes internal cable parts... need a Meter to check it out.. put the meter on battery while someone tries to start it, if the voltage drops from 13.5 to 10 then it is trying to turn over, I always have the new starters tester before I leave a store, they are remanufactured in Malaysa and they use old parts in most of them..

Possibly a bad alternator. No Start Diagnostic Basics EricTheCarGuy

I'd check for bad or corroded contacts/cables from battery to starter (If your vehicle is older than 14 years). If that looks good I'd be suspicious of the solenoid in your starter sticking(will probable need a new starter).

If the problem began when (or soon after) installing the new starter, start checking there. Ensure that all cables to the starter are tight. As a second possibility, if the new starter was actually a rebuilt replacement, the solenoid could be faulty. (I went through three rebuilt starters on my son's truck until we got one that worked properly.)

is the engine turning over? If not your starter motor could be the problem, could be polling give it a light tap with a steal bar

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.

To confirm the problem, the basic troubleshooting is required.

Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

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This will help.

Thanks

dead battery, starter, or selenoid. I would start with checking the battery.

Very likely the new battery is defective - it happens. If you have a know good new battery, then also connect a jumper from the battery negative to the block just to be sure its not a defective or loose ground cable.

Check the Starter Solenoid mounted near the battery.Check it out in the dark...have someone try to start it and see if it sparks at the solenoid.connections may be loose.Also check/wiggle wiring harness to starter.

its the starter replace it and theres not enough power goin to the starter from the battery