Please help! No power but battery is OK
10-04-2018, 05:03 PM
#16
Petza said it better than I could. When a car battery is under a heavy load (e.g cold start) it shows you the true health of the battery. Remember, we're trying to encourage you to look at this by the process of elimination. Once you rule out the battery, you move on the next link (no pun intended) in the problem chain.
10-04-2018, 06:39 PM
#17
I just tried once again and this time dashboard lightup but as soon as I start cranking it dies immediately and no more dashlight.
anyone know what would this refer to which unit is faulty? Does 997.2 known to have ignition switch problems?
anyone know what would this refer to which unit is faulty? Does 997.2 known to have ignition switch problems?
10-04-2018, 06:54 PM
#18
RL Community Team
Rennlist Member
Rennlist Member
YOUR BATTERY HAS FAILED
10-04-2018, 07:14 PM
#19
are you sure it is battery? But why I cannot jump start it? It is BRAND NEW two weeks ago. If it is battery what it causing it to fail?
10-04-2018, 08:33 PM
#20
RL Community Team
Rennlist Member
Rennlist Member
Could have been a bad brand new battery with the plates internally shorted, and since you're hooking up the jump start battery through the same shorted connection, it doesn't work either. You can test this, as I mentioned in my earlier message, by disconnecting the cables from the current battery and only connecting them to the jump start cables. Then try to start the car.
10-04-2018, 09:27 PM
#21
Could have been a bad brand new battery with the plates internally shorted, and since you're hooking up the jump start battery through the same shorted connection, it doesn't work either. You can test this, as I mentioned in my earlier message, by disconnecting the cables from the current battery and only connecting them to the jump start cables. Then try to start the car.
10-04-2018, 09:48 PM
#22
RL Community Team
Rennlist Member
Rennlist Member
Why do you think jump starting it from another vehicle would damage anything? If you hook it up properly I don't see why it would cause harm. In most cases, properly means positive to positive and negative to one battery's negative terminal and the other to the grounding block under the hood of the car with the battery installed. This ground connection to the grounding block is also the last of the 4 that should be made, as it's away from the battery to prevent the possibility of an explosion.
For this test though, the good car you're jumping from doesn't even need to be running so you can go terminal to terminal on all of them doing the negative on the 997 last, but the battery should be disconnected and removed from the car so that a spark on the last connection doesn't ignite battery gasses in the area that could cause an explosion. Also, make sure the positive cable can't contact anything metal or the negative cable and ground out, causing a short, as that could damage things.
10-04-2018, 10:07 PM
#23
Are you trying to jump start it from another vehicle or from a spare battery that you have?
Why do you think jump starting it from another vehicle would damage anything? If you hook it up properly I don't see why it would cause harm. In most cases, properly means positive to positive and negative to one battery's negative terminal and the other to the grounding block under the hood of the car with the battery installed. This ground connection to the grounding block is also the last of the 4 that should be made, as it's away from the battery to prevent the possibility of an explosion.
For this test though, the good car you're jumping from doesn't even need to be running so you can go terminal to terminal on all of them doing the negative on the 997 last, but the battery should be disconnected and removed from the car so that a spark on the last connection doesn't ignite battery gasses in the area that could cause an explosion. Also, make sure the positive cable can't contact anything metal or the negative cable and ground out, causing a short, as that could damage things.
Why do you think jump starting it from another vehicle would damage anything? If you hook it up properly I don't see why it would cause harm. In most cases, properly means positive to positive and negative to one battery's negative terminal and the other to the grounding block under the hood of the car with the battery installed. This ground connection to the grounding block is also the last of the 4 that should be made, as it's away from the battery to prevent the possibility of an explosion.
For this test though, the good car you're jumping from doesn't even need to be running so you can go terminal to terminal on all of them doing the negative on the 997 last, but the battery should be disconnected and removed from the car so that a spark on the last connection doesn't ignite battery gasses in the area that could cause an explosion. Also, make sure the positive cable can't contact anything metal or the negative cable and ground out, causing a short, as that could damage things.
I just tried jump starting it from the other car I have (while battery removed) and this time it tried ro crank many times but it could mot start the car. Lights still on though and didn’t lose power. I wonder if my other cat battery wont start the porsche?
also can i still use the old battery after putting it on tender for sometime? Or is it toast and cannot be used? It is just I literally bought it 3 weeks ago after getting same symptoms
10-04-2018, 10:34 PM
#24
RL Community Team
Rennlist Member
Rennlist Member
thats not what I meant. I bought a jump start device from sams club with 1000 CCA, can I use it with removed battery or that would damage thimgs?
I just tried jump starting it from the other car I have (while battery removed) and this time it tried ro crank many times but it could mot start the car. Lights still on though and didn’t lose power. I wonder if my other cat battery wont start the porsche?
also can i still use the old battery after putting it on tender for sometime? Or is it toast and cannot be used? It is just I literally bought it 3 weeks ago after getting same symptoms
If the car is cranking healthy like normal, there's no reason it shouldn't start unless you have another issue. With the new battery installed, how long did it sit without being driven. If only a few days you have a parasitic draw that's killing the battery. If it was a couple weeks, that's not unusual for a 997,especially if it was left unlocked.
10-04-2018, 10:46 PM
#25
Rennlist Member
It seems that the consensus of responses has been bad battery - why not replace it and if that doesn't resolve your problem you have at least eliminated one issue. If your current battery is relatively new it should still be covered under some warranty - return it.
10-04-2018, 10:49 PM
#26
I don't know about the jump box. Probably safer to use a normal barter from the other vehicle.
If the car is cranking healthy like normal, there's no reason it shouldn't start unless you have another issue. With the new battery installed, how long did it sit without being driven. If only a few days you have a parasitic draw that's killing the battery. If it was a couple weeks, that's not unusual for a 997,especially if it was left unlocked.
If the car is cranking healthy like normal, there's no reason it shouldn't start unless you have another issue. With the new battery installed, how long did it sit without being driven. If only a few days you have a parasitic draw that's killing the battery. If it was a couple weeks, that's not unusual for a 997,especially if it was left unlocked.
Also why would the car not start? what could be another problem? FYI, the battery I used for jump starting is Honda civic. I don't know if it is enough to crank the Porsche 997, would it?
10-04-2018, 10:50 PM
#27
They would not return. Simply because under battery test, it is showing battery is good. They wont replace it unless it shows bad battery
10-04-2018, 11:25 PM
#28
Racer
Put a test-light on your battery terminals directly, or just rig one up with a couple of clip leads and a tail light bulb. You want something that will draw some current, maybe an amp or two. Any autoparts store or walmart will have a simple lantern or flashlight device with clips on it to connect to the battery directly.
Does the light come on and shine brightly?
Open the door, do the cabin lights come on?
When you put the key in, does the car do anything?
If you turn the key to "start" does it try?
All the while, does the light bulb you clipped to the battery continue to stay brightly lit?
If it does, then your car has an electrical system problem, probably a bad connection. The most recent thing was a battery installation, so start there.
If it goes out, then the battery is bad. Sometimes, new ones go bad and open internally.
Voltmeters are great, but they are high-impedance devices. Sometimes, something dirt simple, like a test-lamp will do you more good.
Does the light come on and shine brightly?
Open the door, do the cabin lights come on?
When you put the key in, does the car do anything?
If you turn the key to "start" does it try?
All the while, does the light bulb you clipped to the battery continue to stay brightly lit?
If it does, then your car has an electrical system problem, probably a bad connection. The most recent thing was a battery installation, so start there.
If it goes out, then the battery is bad. Sometimes, new ones go bad and open internally.
Voltmeters are great, but they are high-impedance devices. Sometimes, something dirt simple, like a test-lamp will do you more good.
10-04-2018, 11:33 PM
#29
Pro
Battery is heart of the electrical system so you’ve got to find out if it’s good or not. As car is stuck in a parking lot I’d swap in a known good battery to see if it will start, or at least mobile enough to get it on a flatbed. Take suspect battery to where you bought it for a thorough check. If one of the cells is shorted a jumpstart isn’t going to work.