90' wont start, alternator or starter?

[Kraayl]

So when i go to turn on the car it takes a couple of trys for the starter to turn over and even then most of the lights/gauges etc in the car lose some power lights dim and what not. The starter also sounds slowed down and soon as i stop trying to turn the car on all the lights go back to normal. New batter btw. Any ideas? I figure i will just take the starter out either way since it takes a while to crank and put a new one in.

[vancouverbc]

Sounds like a weak battery. so i guess alternator. Do you have multimeter?test the small wire going to starter. it should be 12v+ when key turned to start.

[vancouverbc]

I would get a hydrometer to test battery. They are only 5 bucks. Also, a digital multimeter for about 20 bucks. a battery booster/jumper would also be good investment.Alternator test using volt meter:

1.turn headlights on for 15-20 seconds to remove surface charge2.measure voltage across battery when engine off3.turn off all electrical loads ie wiper ,etc4.start engine and increase speed to 1500 rpm5.measure voltage across battery with engine steady at 1500 rpm

the voltage reading should be at least .5 volt higher with engine running. if voltage goes up more than 2.5 volts, alternator overcharging.

You can also test with engine running with lights on at 2000 rpm. the voltage should increase at least .5 volts

[Kraayl]

Well now i got a good battery and the starter is turning over normal but it just keeps cranking power seems to be fine. so alternator? or could it be a fuel pump problem? Im also hearing a buzzing coming from behind the intake manifold/fuel rail area, short?

[vancouverbc]

Try to find where the buzzing is coming from. Relays buzz when they donthave enough power.

check if you have spark. remove plugs to see if there is fuel in cylinder.Listen for the fuel pump coming on. It comes on for 5 seconds when you turn key to on. fuel pump is in the hatch. dont confuse with power antennanoise.

jump start to eliminate alternator/battery problem.

[vancouverbc]

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