Idle Air Stabilizer
07-11-2006, 09:19 PM
#1
Burning Brakes
Thread Starter
Idle Air Stabilizer
I have an '85 auto and I am in process of refurbishing the intake system. I checked my idle air stabilizer and mechanically it seemed free, but electrically it did not energize in either direction. I took it apart, PATA to get those tabs revised to allow the can to open, and all looked OK inside electrically. I also confirmed that the mechanical parts were all free to rotate. Holding the pieces together and checked electrical function again and it seemed to function correctly in both directions. So I restaked the can in place and now it doesn't work again, 
. This thing doesn't look all that complicated but I can't figure out why it will work sometimes and not others.
Any suggestions would be appreciated. I guess I could just replace it, but there are a lot other places I could use the money if I can just figure out how to find a reliable fix.
. This thing doesn't look all that complicated but I can't figure out why it will work sometimes and not others. Any suggestions would be appreciated. I guess I could just replace it, but there are a lot other places I could use the money if I can just figure out how to find a reliable fix.
07-11-2006, 11:15 PM
#2
Rennlist Member
Originally Posted by WICruiser
I have an '85 auto and I am in process of refurbishing the intake system. I checked my idle air stabilizer and mechanically it seemed free, but electrically it did not energize in either direction. I took it apart, PATA to get those tabs revised to allow the can to open, and all looked OK inside electrically. I also confirmed that the mechanical parts were all free to rotate. Holding the pieces together and checked electrical function again and it seemed to function correctly in both directions. So I restaked the can in place and now it doesn't work again, . This thing doesn't look all that complicated but I can't figure out why it will work sometimes and not others.
Any suggestions would be appreciated. I guess I could just replace it, but there are a lot other places I could use the money if I can just figure out how to find a reliable fix.
. This thing doesn't look all that complicated but I can't figure out why it will work sometimes and not others. Any suggestions would be appreciated. I guess I could just replace it, but there are a lot other places I could use the money if I can just figure out how to find a reliable fix.
I believe this is basically like the 87, it rotates on an axis or shaft and while I haven't had it apart, it must have some sort of bearing mechanism for the shaft to rotate on/in. Can you check the rotating mechanism for lateral movement? (assuming it's like the 87
Intermittent failure is the worst of all possible worlds. Good luck.
Rod
07-12-2006, 01:22 AM
#3
Addict
Rennlist Member
Rennlist Member
Originally Posted by WICruiser
I have an '85 auto and I am in process of refurbishing the intake system. I checked my idle air stabilizer and mechanically it seemed free, but electrically it did not energize in either direction. I took it apart, PATA to get those tabs revised to allow the can to open, and all looked OK inside electrically. I also confirmed that the mechanical parts were all free to rotate. Holding the pieces together and checked electrical function again and it seemed to function correctly in both directions. So I restaked the can in place and now it doesn't work again, . This thing doesn't look all that complicated but I can't figure out why it will work sometimes and not others.
Any suggestions would be appreciated. I guess I could just replace it, but there are a lot other places I could use the money if I can just figure out how to find a reliable fix.
. This thing doesn't look all that complicated but I can't figure out why it will work sometimes and not others. Any suggestions would be appreciated. I guess I could just replace it, but there are a lot other places I could use the money if I can just figure out how to find a reliable fix.
I'll quote to you from the Porsche 1985 tech update (my inputs in blue). From the LH control unit the air regulation valve recieves a cycled voltage signal (100 Hz) which acts on both windings alternatively during a positioning period. This produces an opposing rotating forces on the armature. Due to the inertance of the armature, the valve is set to a certain angle, which is equal to the duty cycle of the applied voltage.
07-12-2006, 07:42 PM
#4
Burning Brakes
Thread Starter
I was appling battery voltage to the exterior terminals of the three terminal set, with the center terminal grounded (off the vehicle). The ground was connected and I would touch the positive to either of the terminals alternately at no particular frequency. I will take it apart again to see I fried any of the internal electrical as I did not limit the current supplied.
Thanks for the information.
Thanks for the information.