So, ive done 1500mi on my motor since the rebuild and now ive finally unbent my throttle cable bracket so the motor idles on its own.

It occasionally will not hold idle and die, but what i noticed is it hlds a strong nice idle (around 1100. have not yet tried lowering it) when my voltage shows 14 volts. whenever it drops just slightly below that line it doesnt want to be so nice.

This problem fluctuactes as i drive..im convinced my motor is broken in and ready to be set, just this wall has devoloped..anyone have any insight or past experience with this?


1988 S4 NA

 

Voltage drops at idle are not uncommon, just depends on how bad the drop is.

 

Not at idle specifically. the voltage will go down and up as im cruising. So say i start my car. it reads 14 volts. idles fine. I pull out of my street get to the main road,And voltage drops 0.2 volts. no hold idle if i clutch in or go to nuetral. i pass through a few blocks and it will be back up and holding again. like that.