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post #1 of 5 Old 04-24-2002, 09:46 PM Thread Starter
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Question Electrical Guru's...need help

I have an electrical problem that is progressively getting worse. Since installing the Bullitt intake on my car and adding the Cobra alternator the lights in the car will from time to time surge. What I mean is they will dim and get bright repetitively. Now it's always been my understanding that it's usually a sign of the alternator going out, however the surging is from the volts dropping then surging up. In this case you can see by the stock gauge that the volts are surging up then going back down causing the flickering that I'm seeing.

Tonight on the way home I came to a light and when stopped the stock gauge just started to continually move to the right. Thinking that that the battery was being "over charged" I cranked the air on and it leveled off stopping the surging. At cruising speed the problem is nearly non-exsistant but when the car is stopped at a light you can see it's overcharging the battery. Sometimes to the extent of the battery light coming on or stalling.

My question is do our cars still have voltage regulators if so I'm wondering if I need a Cobra or Bullitt type for the higher amps? The Cobra alternator is a 130 amp, not sure what the GT alternator was. Any ideas, suggestions, help? I find it hard to believe the alternator is bad.

I need to figure out something because it caused my car to shut off at the track this past weekend and I can't have that happening during elmination rounds.

Thanks,

Bill


1994 Mustang LS Swap - 11.40 @ 117.88 / 9.85 @ 134.74 nitrous / 8.73 @ 157.13 PT88
2004 Mach 1-P1SC (11.93 @ 120.54, 468RWHP/417RWTQ) - SOLD
2000 GT 2V NA (11.97 @ 113.20 w/1.56 60ft, 285.3RWHP/296.3RWTQ) - SOLD
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post #2 of 5 Old 04-24-2002, 10:15 PM
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If the only electrical change you made was the alternator?
Then I would make sure the connections are tight. Wires and bolts.
Do you still have the original alternator? If so, put that back on to see if you still have the same problem.
When you swapped intakes, was there a ground strap? Did you reinstall it?
Worst case senario: Did you crimp a wire in the intake assembly?

I'm no Guru, but I hope these thoughts/questions help.

Mike


1999 SVT Cobra #1970
2012 F250SD super cab long bed 4x4 6.2l
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post #3 of 5 Old 04-24-2002, 11:01 PM
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Bill,

If you have added the alternator 4G to 6G harness adapter, I would check that. After installing the Bullitt Alternator, I visited an Alternator Remanufacturing shop, and they suggested (at a money loss to them) that I do not use the harness adapter, rather the 6G plug be soldered in securely to the existing wiring.

I have NO problems with the new alternator and plug. And they could have easily made money off me, by selling me an expensive adapter. Instead, they gave me a $5.00 part and suggested that I solder it in.

Also, the Bullitt Alternator has a built in regulator, and doesn't require a 3 wire plug. Just an FYI.

No surging, no problems. Just an idea. Don't know if it means anything...

goodluck, and let me know if you need just a plug, I have access to them at my call!
joe

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post #4 of 5 Old 04-25-2002, 11:08 AM Thread Starter
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Thanks for the suggestion Joe. I could always cut the adaptor plug and just solider it in place. Since no one else has complained about it I'm almost positive it's an alternator problem now. I'm going to see if my buddy at Ford can swap them out for me and try that.

Bill

1994 Mustang LS Swap - 11.40 @ 117.88 / 9.85 @ 134.74 nitrous / 8.73 @ 157.13 PT88
2004 Mach 1-P1SC (11.93 @ 120.54, 468RWHP/417RWTQ) - SOLD
2000 GT 2V NA (11.97 @ 113.20 w/1.56 60ft, 285.3RWHP/296.3RWTQ) - SOLD
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post #5 of 5 Old 04-25-2002, 01:27 PM
 
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Barring a bad connection or a quirky ground, it reminds me of a voltage regulator, which I believe is integrated in the alternator.
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