my 72 deville with a 472 didnt start the other day - instead when i turned the key there was a loud slapping / tick sound and the starter wouldnt even try to start the car. I tried turning the key on and off several times and each time that same noise happened. The battery was fine because all the lights in the car were very bright... Then the other day I tried starting it again and the first time i turned the key it ticked / slapped, and then the 2nd time it started! It then started a few more times with no problem, and now today it just ticks again, one loud TICK coming from I believe the starter (behind the lower firewall on the passenger side). Is my started on its way out and just starting sometimes, or is something bad with the wiring of my car, or if anyone has any ideas please let me know. Thanks!
Chances are the sound you are hearing is the solenoid. When you turn the key power is provided to the solenoid. The solenoid pops the bendix out and provided power to the starter motor. So one of two things is going wrong.. The contacts in the solenoid are bad and not allowing current to flow to the starter or the starter itself has a problem like bad brushes or a dead spot. If moneys tight you can try to just replace the solenoid but since you have to remove the starter anyway its best to just go ahead and replace them both as a unit.
ill try cleaning the wiring today and then if i can still get it to not start ill just buy a new starter.
anyone know if its necessary to raise the car up to remove it? i think my shop manual says to jack it up but id rather just get underneath it (i should be able to fit) as long as the starter can physically be removed without lifting the car.
after breaking down in a home depot parking lot, i found out the problem was a loose connection on the starter end of the positive battery cable! the cable feels like a nut is loose and it just wiggles around freely, so i think im just going to replace the whole positive cable. is there anything i should know before doing this? i think the positive battery cable consists of a few wires, the thickest going to the starter
i cleaned off the positive battery cable on the starter end and now it's been starting up immediately every time! i also replaced the ends of two wires connected to a post on the alternator, because they were in terrible shape - one looked chewed up. i thought this might fix my pulsating lights problem: the interior, head, and dash-lights all pulsate about 2 times per second, and there's also a ticking noise thats in synch with the pulsating (or dimming i guess would be a more accurate description). i took the voltage regulator off the car and had it tested at autozone and it passed all 5 tests. then they tested the alternator on the car and it passed too, putting out 63 amps.
could there be a problem with the alternator or voltage regulator even though it passed those tests where it wouldnt be failing but does this pulsating thing? it seems to only happen occasionally. sometimes right away when i start the car, other times after ive been driving for a while, but it usually continues until i turn the car off - it never starts and then goes away. could it possibly be a dirty negative battery cable on the engine end? the negative cable is definitely clean on the battery side - i havent checked out the engine/intake side yet though.
A bad diode in the alternator usually does that. It may still pass a load test even so. If you're going to change it, you could convert to a more modern one with the integral regulator,it's easy to do.