Originally Posted by girard90foxbody
Any one who can help? starting w issue one. When coming to a stop and pushing the clutchin, my idle will drop so low that vehicle cuts off. Turns right back on though. Cleaned mass air flow sensor. Checked tps.
Any TPS voltage between .5 and 1.25 is considered good by an A9L computer, but you really want to be inside 0.6 to 1.1 volts. If it is inside that range, adjusting makes no difference.
Mustang throttle position sensor
The IAC would be more of a worry to me, as would the throttle stop.
Im lost? This brings me to my next question. When the vehicle is at idle my alternator doesnt seem to doing its job. Very low voltage on my instrument panel. Checked batt. Good. Had alt tested. Siad it was good but border.
There is no such thing as good but border. Test it yourself.
Testing battery and charging system
When car is moving no prob. At idle my car stereo will not even work properly. Anyone know where else to look. I also adjusted my tps down to .75v dc
I don't know why you would do that, but it is still within acceptable range. Ideal would be about .8 to .85 volts, not that it means anything much if you are at .75 or 1.0 or anything away from the edges.
I would look at the IAC and closed throttle adjustment screw on the TB.
Before you rush out and start changing parts, you were asked good questions. Do you have under drive pulleys? Do you have any stuff that greatly increased electrical system load demand? The stock alternator is plenty big if you did not add a bunch of current demand from power hungry things, and if it is good. It is pretty tough for one to be good and test "borderline". If it tests borderline, and if the test setup is good, that means it has a bad part inside.
But before you change parts, do you have any high current loads on it or do you have under drive pulleys?
The battery should hold everything at idle for some period of time, as long as the battery is fully charged. Measure the battery voltage as shown on the link I posted. That will tell you if something is messed up far better than Autozone.