I've been having an electrical problem with my 91 5.0 mustang.
Symptoms: Car wont start, it will start if you boost it and it will keep running. Turn it off for 10 or 15 minutes and it will probably start again, but leave it over night and it wont start. Battery gauge is dependent on rpm (seen in video), and the ignition coil was making a bad noise, also seen in video.
The battery is about a year old, and I had it tested last season when this problem started and it checked out.
Alternator would appear to be working since when you rev it, the volt gauge goes up. And after taking it to 3 different part sources, and nearly killing one of their jackass workers, it tested good on the alternator test machine.
I also checked for a parasitic drain. When set on DC 10A, it reads 0.04 between the negative cable and negative terminal. If I open the driver door, which would make the car want to draw current for the interior lights, correct? With the door open it reads 0.67. So wouldn't 0.04 be a normal parasitic draw (stereo/computer staying on all the time to keep settings)?
And currently today I just tried to boost it and start it again. But all that I get when I turn the key is a loud buzz coming from the ignition coil, and no turn over at all. The only thing I changed today was that I sanded a main grounding spot to make sure it was grounding right.
Any ideas?
Mustang :: MVI_0334.flv video by Ztweny8 - Photobucket
Symptoms: Car wont start, it will start if you boost it and it will keep running. Turn it off for 10 or 15 minutes and it will probably start again, but leave it over night and it wont start. Battery gauge is dependent on rpm (seen in video), and the ignition coil was making a bad noise, also seen in video.
The battery is about a year old, and I had it tested last season when this problem started and it checked out.
Alternator would appear to be working since when you rev it, the volt gauge goes up. And after taking it to 3 different part sources, and nearly killing one of their jackass workers, it tested good on the alternator test machine.
I also checked for a parasitic drain. When set on DC 10A, it reads 0.04 between the negative cable and negative terminal. If I open the driver door, which would make the car want to draw current for the interior lights, correct? With the door open it reads 0.67. So wouldn't 0.04 be a normal parasitic draw (stereo/computer staying on all the time to keep settings)?
And currently today I just tried to boost it and start it again. But all that I get when I turn the key is a loud buzz coming from the ignition coil, and no turn over at all. The only thing I changed today was that I sanded a main grounding spot to make sure it was grounding right.
Any ideas?
Mustang :: MVI_0334.flv video by Ztweny8 - Photobucket