Maybe you should take your battery and alt off and get them tested. You shouldnt drop that much, and 9v, thats not good at all unless you are using a smoke alarm in that car. Your battery should hold more of a charge.
Rick
Rick
Local Installs Wa
- Thread starter RickSvt
- Start date
FOx body's are notorious or having bad wiring to alt, causing issues with charging like Joey is talking about. That would be the first thing I'd check.
Also, Joey, ware you running an underdrive pulley on that alt? If so, take it off as those are normally more trouble than they're worth when your running a system like you are. IMHO.
Also, Joey, ware you running an underdrive pulley on that alt? If so, take it off as those are normally more trouble than they're worth when your running a system like you are. IMHO.
I learned that lesson a long time ago. Not worth the minmal power increase, if any, for the charging system problems.
Rick, don't buy another pulley puller. You can use my BF unit whenever you need to. You're about the only person I'd loan it to.....and better than it sitting on the shelf.
I also forgot to vouch for RIck and Chuck's workmanship, it's second to none as these guyshave been wrenching on Cobras ( and the occasional TL) for awhile...
I also forgot to vouch for RIck and Chuck's workmanship, it's second to none as these guyshave been wrenching on Cobras ( and the occasional TL) for awhile...
RickSvt said:
Cliiford alarm system as well. The alternator pulley is chrome like the rest of them. So it may be a underdrive.? What else needs to be done.
One thing to check would be how the power to the alarm system is being drawn. People really, really suck at installing alarms, and they are very rarely done correctly. It should be drawing power through a relay (a solenoid would be better and more proper, but whatever) such that it's not drawing current when the car is on. Unfortunately, most draw it from constant power, which drains the hell out of the battery and helps to overdraw the alternator. Definitely a possibility.
Money is still on the underdrive and alt. wiring, though.
Money is still on the underdrive and alt. wiring, though.
Ill have someone look at it.
Joe5.0 said:
Your problem is not a 12 volt problem. It is a ground Problem.
Check your fender ground and up grade it from the 12 gauge that it is now to a 4 gauge.
Your battery has two grounds on it. A 4 gauge for the block and a 12 gauge for the fender. The fender ground is the ground that supplies ground for everything in the car minus the block.
So when you upgrade the fender ground you upgrade your charging system.(lights get brighter,battery charges,faster and so on)
I want to chime in and say that Rick and Chuck did an amazing job on the install of my whipple...In addition, Rick has helped me with any problems or questions that I have had with the cobra, since I've had the car...
Update.
I checked my gorund today and it was very loose, tightened it up, and no more loud noise....atleast for now. I still have a Substantial voltage drop when i turn on my lights, heat, etc.
I checked my gorund today and it was very loose, tightened it up, and no more loud noise....atleast for now. I still have a Substantial voltage drop when i turn on my lights, heat, etc.
Joe5.0 said:
You still have a ground problem.
Upgrade your fender ground and check the grounds in your kick panel. The grounds in your kick panels are the ones for your dash.
If that doesnt work take your car to an autoparts store (Advanced,Autozone,Pepboys or Batteries Plus) and have them but your battery and alternator under a load test.
Your battery could have a weak cell or the alternator could have a bad diode.
Alternator is BRAND NEW. So it may be the battery. When i just turn the car "on" (not start) im only seeing 9 Volts
What is the voltage of the battery with it disconnected? Remove the battery and have it tested. You could have a short drawing excessive current.
I will do that Dave! Gotta get this figured out, driving me crazy.
Don't rule out the alternator just because it's brand new. That's no guarantee of anything.
Other suggestions were already made, but to add: as was said in more words- when checking grounds, check ALL of them, not just the major ground. It only takes one, even a small one, to cause a problem.
Other suggestions were already made, but to add: as was said in more words- when checking grounds, check ALL of them, not just the major ground. It only takes one, even a small one, to cause a problem.
I Believe when the previous owner had the Powermaster Atlernator installed, Brads Custom Auto installed it. Even with that alternator i was still seeing a Voltage drop. What other grounds need to be checked? Ill pull the batter out tmmrw and have it tested. I dont need that RF Surpressor anymore do I? There are so many aftermarket wires on this car its a Nightmare.
I dont think it is a current draw. A 1/2 amp draw can suck a battery down over night. The bad ground could have caused the battery not to get a full charge. Put the battery on a slow charge overnight (2amp).
If that doesnt do take it in and get it checked.
If that doesnt do take it in and get it checked.
TPGT97 said:
And disconnect everything when you charge it.
What if the drop continues?
Joe5.0 said:
Drop it like it's hot!
Users who are viewing this thread
