Hello all,
Not sure my ISC is working correctly - 1989 JF62 3FE with 278,XXX. Have followed the FI-71&72 steps in the Toyota Repair Manual. The resistance for all the terminals is within spec (19.9). I can feel the valve move when I ground each contact (S1,2,3,4) with battery voltage applied to B1 and B2. Even though I feel the valve move - it barely moves. I'm not clear from the Manual how much/little it is supposed to move. Video here:https://www.dropbox.com/s/nsyl4edmhlu6318/IMG_5709.MOV?dl=0 - at about 35 seconds in you can see it just move.
Symptom I am chasing down - during idle it would suddenly drop to 400/500 rpm'ish and then jump right back to a normal idle. Seems to happen randomly. Am working through the EFI section of the Manual as a learning experience/to see what's not working properly when I ran into this.
I'm hesitant to take the electrical part of the ISC apart to check it's guts - worth looking at?
Thanks in advance!
Not sure my ISC is working correctly - 1989 JF62 3FE with 278,XXX. Have followed the FI-71&72 steps in the Toyota Repair Manual. The resistance for all the terminals is within spec (19.9). I can feel the valve move when I ground each contact (S1,2,3,4) with battery voltage applied to B1 and B2. Even though I feel the valve move - it barely moves. I'm not clear from the Manual how much/little it is supposed to move. Video here:https://www.dropbox.com/s/nsyl4edmhlu6318/IMG_5709.MOV?dl=0 - at about 35 seconds in you can see it just move.
Symptom I am chasing down - during idle it would suddenly drop to 400/500 rpm'ish and then jump right back to a normal idle. Seems to happen randomly. Am working through the EFI section of the Manual as a learning experience/to see what's not working properly when I ran into this.
I'm hesitant to take the electrical part of the ISC apart to check it's guts - worth looking at?
Thanks in advance!