You said that you checked the battery and it was 630 amps at 12+ volts. Did you check it under load?
Lotsa times a battery that powers lights and radio cannot generate the amperage needed for the starter motor. It can energize the solenoid, but cannot run the starter motor.
We can often talk ourselves into the new car/higher reliability scenario, but that's not always a sure thing. Sounds like you've had a car that has been pretty reliable.
This problem does not sound major at all and I agree with the other posters about grounding, cables, etc. Especially internal rot in the cables. When I'm in this situation and I narrow it down to a couple of probable culprits, since it's my "free" labor I sometimes go ahead and replace those probables, depending on part costs.
So if you wind up sticking in another starter and some cables, you are still WAY under the cost of even the floormats on that new car! Plus, you won't get much $$ for the car, so why not keep it as a back-up?
My last 3 cars have been used and I've had excellent luck with them. I can't see buying brand new anymore, letting that first buyer take the depreciation hit.
Lotsa times a battery that powers lights and radio cannot generate the amperage needed for the starter motor. It can energize the solenoid, but cannot run the starter motor.
We can often talk ourselves into the new car/higher reliability scenario, but that's not always a sure thing. Sounds like you've had a car that has been pretty reliable.
This problem does not sound major at all and I agree with the other posters about grounding, cables, etc. Especially internal rot in the cables. When I'm in this situation and I narrow it down to a couple of probable culprits, since it's my "free" labor I sometimes go ahead and replace those probables, depending on part costs.
So if you wind up sticking in another starter and some cables, you are still WAY under the cost of even the floormats on that new car! Plus, you won't get much $$ for the car, so why not keep it as a back-up?
My last 3 cars have been used and I've had excellent luck with them. I can't see buying brand new anymore, letting that first buyer take the depreciation hit.