m50 Wont start without jump!!!!!!

[timmy]

I let the car sit for 4 days or so while i was driving another vehicle. I went to start it sunday night and it was dead. Jumped it with a portable jump pack and started up with no hesitation. Drove it a few miles and parked it. I went out about an hour later. It kicked but wouldn't start. Once again i jumped it with the jump pack and started perfectly fine. Ive been doing this the last few days only driving the car a few miles to work and it still does it. Could it be the battery and the fact that i havent driven it long enough to recharge it fully or should i look somewhere else. I dont think its the starter due to the fact it starts up fine with the jump pack. My battery terminals look a little coroded so maybe its not getting full contact.

[rudenate]

If it starts with a jump it's the battery. This could be due to lack of charge during driving (alternator or you just aren't driving it long enough) or you have a parasitic drain. Or your battery is bad. A DMM/DVOM would let you figure this out.

[wenbeaver89]

Sometimes when a battery drains all the way dead it kill the cells and never holds charge good again! Seems that way to me anyhow, i would say its the battery!

[maclogos]

This has happened to me plenty of times. Take the battery to a local autoparts store and have it tested or just replace with a new one. Most batteries once drained completely cannot take charge or will just not hold a charge at all. Do you have a aftermarket alarm or something that caused it to drain in 4 days? I leave mine parked for weeks at a time and never had the battery drain on me. Might wanna take a test light to the battery and see if there are any electrical drains that could cause the battery to die that fast. I had a small drain before and it turned out to be a badly wired kill switch from PO.