8v '93 sidekick
yes, the ISC (IAC is in base of TB ) (cold start idle , water temp. operated idle speed , device, no wires here)
ISC is top and is electric. (TB top right, side, drivers seat perspectives)
that sound in the 1st video (2nd is ford) is clear.
is from the TB induction. as he demonstrated.
this car runs perfectly with that huge air tube off, for deeper analysis of Induction air noises. if present.
one can use stethoscope sold for $5 in all autostores to listen to vast parts on car, and for sure pressed to the ISC casing up top left in video is the ISC
the ISC is just an ELECTRIC air valve. closes by internal spring. this valve is what does 800 RPM hot idle speeds, Idle speed controller., ISC.
the ECU modulates the ISC at 200 times a second, and if the ISC was to get very badly warn this 200 Hertz sound can be heard.
here is what 200Hz sounds like to humans. seems a match; NO ?
https://www.youtube.com/watch?v=xvF0iMiIOUU
yes, the ISC (IAC is in base of TB ) (cold start idle , water temp. operated idle speed , device, no wires here)
ISC is top and is electric. (TB top right, side, drivers seat perspectives)
that sound in the 1st video (2nd is ford) is clear.
is from the TB induction. as he demonstrated.
this car runs perfectly with that huge air tube off, for deeper analysis of Induction air noises. if present.
one can use stethoscope sold for $5 in all autostores to listen to vast parts on car, and for sure pressed to the ISC casing up top left in video is the ISC
the ISC is just an ELECTRIC air valve. closes by internal spring. this valve is what does 800 RPM hot idle speeds, Idle speed controller., ISC.
the ECU modulates the ISC at 200 times a second, and if the ISC was to get very badly warn this 200 Hertz sound can be heard.
here is what 200Hz sounds like to humans. seems a match; NO ?
https://www.youtube.com/watch?v=xvF0iMiIOUU
http://www.fixkick.com