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Old 02-13-2013, 02:57 PM   #36
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No i meant that a wire or conductor somewhere in your setup might be overheating possibly from corrosion, not that that's the case but the hotter a wire gets the less current it can pass without heating up even more, so it can kinda spiral. Seems like your battery is charging ok.

I didn't have a specific one in mind, but if you notice that it happens when the engine bay is hot then maybe its another lead to follow (no pun intended), I'd leave it for last though if you do what everyone else says and still have problems, start looking closer at your wires
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Old 02-13-2013, 04:28 PM   #37
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Here's the voltage off and on
If its only 14 flat when charging that is not enough. It should be a minimum of 14.3 but should be more like 14.5-14.6. If its less then that your not charging properly. Are you running underdrive pullys?
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Old 02-13-2013, 04:43 PM   #38
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If its only 14 flat when charging that is not enough. It should be a minimum of 14.3 but should be more like 14.5-14.6. If its less then that your not charging properly. Are you running underdrive pullys?
My voltage meter doesn't read decimals I think
Cause when it was off it read 12 n jumped to 13
Yes I have underdrive pulleys
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Old 02-13-2013, 04:57 PM   #39
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My voltage meter doesn't read decimals I think
Cause when it was off it read 12 n jumped to 13
Yes I have underdrive pulleys
Theres your problem. Underdrive pullies are nothing but trouble. Seems like every one that installs them has charging or cooling issues. Or both
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Old 02-13-2013, 05:23 PM   #40
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Theres your problem. Underdrive pullies are nothing but trouble. Seems like every one that installs them has charging or cooling issues. Or both
So here's pics of my new readings wit different meter
1st:car off
2nd:car on
3rd:car on w/ headlights
4th:car on w/ headlights,stereo, and heater full blast
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Old 02-13-2013, 06:38 PM   #41
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Bump
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Old 02-13-2013, 06:43 PM   #42
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Like keaton said. It's your underdrive pulleys. Put your stock pullied back on and your problem is fixed. If you don't have them you can just get an alternator overdrive pulley. I got one from summit for around 20$. And you will also need a smaller belt if you go that route.
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Old 02-13-2013, 06:54 PM   #43
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Like keaton said. It's your underdrive pulleys. Put your stock pullied back on and your problem is fixed. If you don't have them you can just get an alternator overdrive pulley. I got one from summit for around 20$. And you will also need a smaller belt if you go that route.
Got a part number on that pulley.?
Do I need the smaller belt even though I deleted the smog and ac.?
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Old 02-13-2013, 08:26 PM   #44
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I drove it from work to my house 30-45min drive tops
http://youtu.be/LCmXtjM0vLw
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Old 02-13-2013, 09:01 PM   #45
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Got my alt and bat tested

Alt is good
Bat is at 100%
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Old 02-13-2013, 09:07 PM   #46
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Got my alt and bat tested

Alt is good
Bat is at 100%
UNDERDRIVE PULLEYS.
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Old 02-13-2013, 09:10 PM   #47
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UNDERDRIVE PULLEYS.
I ordered the overdrive alt pulley already
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Old 02-13-2013, 09:19 PM   #48
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I ordered the overdrive alt pulley already
Cool. They almost never work. It actually irritates me a bit that suppliers even sell them. I bet I have seen this issue on this forum 100 times. They can cause cooling issues to but usually don't. But 9 out of 10 times they cause charging issues. And it may only be a little or even at certain rpms is why you may not see it with a meter.
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Old 02-13-2013, 09:32 PM   #49
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Cool. They almost never work. It actually irritates me a bit that suppliers even sell them. I bet I have seen this issue on this forum 100 times. They can cause cooling issues to but usually don't. But 9 out of 10 times they cause charging issues. And it may only be a little or even at certain rpms is why you may not see it with a meter.
Do u kno what size belt I need.?
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Old 02-13-2013, 09:38 PM   #50
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No that would be really hard to guess. I would try maybe an inch smaller. The best thing to do is run a string around the pulleys, then measure it. I would normally say use the old belt, cut it, then tape it together. But not this time just incase you have other issues.
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Old 02-13-2013, 10:59 PM   #51
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No that would be really hard to guess. I would try maybe an inch smaller. The best thing to do is run a string around the pulleys, then measure it. I would normally say use the old belt, cut it, then tape it together. But not this time just incase you have other issues.
Thnx man
Ill keep u updated
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Old 02-17-2013, 02:55 PM   #52
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So I jus put the overdrive pulley with a inch shorter belt
Umma drive around town lets see what happens but I turned on the stereo heater lights done light trunk light n the gauge meter hardly moved
Crossing my fingers
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Old 02-17-2013, 03:02 PM   #53
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Y'all heard anything about under drives and oil pumps? That was why I didn't put them on my 97. I read some things that scared me off.
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Old 02-17-2013, 03:11 PM   #54
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Y'all heard anything about under drives and oil pumps? That was why I didn't put them on my 97. I read some things that scared me off.
What about them
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Old 02-17-2013, 03:12 PM   #55
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Y'all heard anything about under drives and oil pumps? That was why I didn't put them on my 97. I read some things that scared me off.
What? you can't underdrive the oil pump. It's driven by the distributor.
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Old 02-17-2013, 03:16 PM   #56
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That somehow under driving the engine could lead to a problem with the oil pump. It's been a while since I read it and I could be mistaken. I just remember it being the reason for me not under driving my cobra.

---------- Post added at 05:16 PM ---------- Previous post was at 05:14 PM ----------

I think it may have only been linked to the model of cobra I had. Here is a little something.

http://forums.corral.net/forums/svt-...-oil-pump.html
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Old 02-17-2013, 03:28 PM   #57
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That somehow under driving the engine could lead to a problem with the oil pump. It's been a while since I read it and I could be mistaken. I just remember it being the reason for me not under driving my cobra.

---------- Post added at 05:16 PM ---------- Previous post was at 05:14 PM ----------

I think it may have only been linked to the model of cobra I had. Here is a little something.

96-98 Cobra Underdrive Crank Pulley effect on the Oil Pump - Ford Mustang Forums : Corral.net Mustang Forum

Ok. first I wouldn't run them on a 5.0 at all. that's because 9 of 10 people have charging issues. But mod motors are different and I cant really advise on them. But what the article is saying that it increase harmonics. Basically more vibration etc. and that is transfers into the oil pump gear. I would assume that with a high quality set of ud's this would be less likely to occur. And also I would think aluminum ones would be better as aluminum is better at reducing harmonics.
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Old 02-17-2013, 03:35 PM   #58
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Yeah, all I read when I saw that was engine failure lol. I was like nahhhh. Plus I was gettin plenty out of my cobra. Keep us posted. You have under drives on that beautiful fox of yours?
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Old 02-17-2013, 03:58 PM   #59
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Yeah, all I read when I saw that was engine failure lol. I was like nahhhh. Plus I was gettin plenty out of my cobra. Keep us posted. You have under drives on that beautiful fox of yours?
If ur talking to me thnx n yes I do I just added and overdrive alt pulley lets see what happens
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Old 02-17-2013, 04:02 PM   #60
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Keep us posted.
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Old 02-17-2013, 04:42 PM   #61
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If ur talking to me thnx n yes I do I just added and overdrive alt pulley lets see what happens
I think it will work. It's funny cause most people think they can just put the stock alternator pulley on and be fine. But the crank is still an ud so it still slows the alternator. But overdriving the alternator should put it back close to the proper rpm and the other stuff is overdrive. I went this route also becuase my stock pulleys looked like garbage.
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Old 02-17-2013, 06:21 PM   #62
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I think it will work. It's funny cause most people think they can just put the stock alternator pulley on and be fine. But the crank is still an ud so it still slows the alternator. But overdriving the alternator should put it back close to the proper rpm and the other stuff is overdrive. I went this route also becuase my stock pulleys looked like garbage.
This was the 1st try
The second time it didn't want to turn on
It's like if the battery is dead but it isn't
It'll start up again within one hour
http://youtu.be/WHMBqcHbiLs
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Old 02-17-2013, 07:29 PM   #63
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You may want to check the starter. Just a thought... The fact that it tries to start and then cranks slower each time you try, getting to the point where nothing happens sounds like a capacitor problem. (Which is still a charging problem technically ) If the capacitors on starter are damaged, it could cause them to discharge the electricity before its supposed to acting like a dead battery when in fact they are just not able to charge or hold a charge themselves. It's kind of a long shot here because usually when a capacitor fails it lets to much electricity through burning up the motor.

---------- Post added at 07:29 PM ---------- Previous post was at 07:28 PM ----------

Also. Capacitors are affected by heat.
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Old 02-18-2013, 02:05 PM   #64
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---------- Post added at 07:29 PM ---------- Previous post was at 07:28 PM ----------

[/COLOR]Also. Capacitors are affected by heat.
+1 Kinda what I was gettin at
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Old 02-24-2013, 07:59 PM   #65
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Changed the starter problem solved

Thnx guys
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Old 02-24-2013, 09:25 PM   #66
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Changed the starter problem solved

Thnx guys
Glad it worked out!
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