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2007 Dodge Charger 3.5L Engine Won't Turn Over


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Joneil27
New User

Nov 14, 2020, 5:10 PM

Post #1 of 3 (1061 views)
2007 Dodge Charger 3.5L Engine Won't Turn Over Sign In

2007 Dodge Charger Base Model
3.5 L V6
140k

So I own three cars and two of them are driven everyday or so. The Charger is my third car and since the pandemic hit it's been sitting since about April in the driveway. I've went out and started the engine and let it run over the last few months. A couple times the battery has died and I've recharged it and got the car up and running. This time has probably been the longest gap in between starts about four weeks. The batter died as usual and I went out charged it but this time when I went to start the car the engine won't even turn over. The battery charger said it was at 100% when I booked it back up but when I turn the key nothing. The starter was replaced three years ago. I'm lost on what it could be


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Nov 14, 2020, 9:56 PM

Post #2 of 3 (1045 views)
Re: 2007 Dodge Charger 3.5L Engine Won't Turn Over Sign In

I feel the pain. Help me help you on this I just vaguely know some about what I think you've got here and problems just at a glance. Battery is in trunk under that mat, right?
It's supposed to be rated for some incredible CCAs like 1,000 or maybe more?
By all odds it's still a "flooded lead/acid" battery so please check on that and also find out how old it is in code or easily figured out looking for month and year it was made new.


This and most lead/acid batteries don't do going low charge nor thrilled about sitting around yet you've been good to run it at all for this disaster ongoing.


Notes: This and others need trickle chargers* and still started to keep them if outdoors they'll be some hell to pay if not driven around + understood hard or impossible for each situation.
*Search those out you should want a "floating" one or more than one with multiple things/cars or other that auto SHUTS OFF and comes on without commotion on its own. Dang things got pricey vs just a year ago or so. Check for all weather ones too a tad more $$ even just 2A now seeing some 4A able should be all you need.
Your current charger can't really tell you it's fully charged AND up to AMPs available just that it achieved the max 12v the charger sees from a dinky machine or this high AMP battery.
Lead/acid is NOT like devices, phone batteries it degrades badly when low or fast charging! Those lone cables rear to front have to be checked for loss of delivery AMPS it's long way for 12V to make that long a run so should be at least (2) gauge wire is nasty costly OE may be enough and fine just need cleaning up and greased at engine end you can see and work on inside trunk ends a lot easier.
Of that dissertation there's a high bet the battery is junk AMPs wise now and has been just from going dead and recharging it. If older isn't going to take that as many times as you mentioned it will kill it even if not too old.
Think forward to AGM batteries now this car more than most could really use it. It needs to be moved around and driven too don't forget OMG changing oil despite no miles that's time on it too!
Right now I think I'd see if carefully disconnecting it (maintain memory contact) and jumping this with high power of another battery see if it will behave might be easier and more informative than the help you'll find quickly if just a helper to watch meters and start it while you watch or vs versa.


Again - AMP testing not just a color thing on a charger this can't still be good is causing harm to continue without doing something things are underpowered despite your efforts that battery was ruined newer or not by all odds but check,


T



Sidom
Veteran / Moderator
Sidom profile image

Nov 14, 2020, 10:06 PM

Post #3 of 3 (1043 views)
Re: 2007 Dodge Charger 3.5L Engine Won't Turn Over Sign In

Start off with taking the cables off and cleaning the battery posts and cable ends really good. The can corrode up just sitting and create all sorts of problems. If it still won't start, pull the battery out and have it tested.

FYI, batteries need to be cycled to keep them from going bad. Sitting for long periods of time with out being slightly charged and discharge (you get this during normal driving) is very hard on a battery and can cause it to go bad very quickly.






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