(02-10-2016, 06:16 AM)fixkick Wrote: yes the air hoses are old and most have cracked , and messes up MAF readings big time.
well the IAC needs to work cold. but your having hot start problems. IAC is closed hot.
seafoam is no cure, but the gunk under the throttle valve , will not stop starts, its closed 100% ,until you step on the throttle.
what works is clean parts by hand, no magic to that. and is hard work,.
the iSC must be free to work, or hot starts will be very difficult, lacking fresh metered air.
sure id use sealant, there are many kinds, most work. ok
6mm bolts are all about 89 inch/lbs torque, (inch not feet) divide by 12 to get feet.
get ISC freed up set duty cycle hot, and it now idles all day at 800rpm
the TPS idle switch must be closed, and 0v or the ISC is born dead.
the isc is open at 12v and closed at 0v.
(it can leak a tiny bit closed, no problems, most do this old)
http://www.fixkick.com/videos/FLV-all/showtime.html#ISC
isc is easy to work with
the video you can hear the snappy clunks.
IAC a big pain, so if its closed hot, and open cold, its ok, just leave it be...
Did not remove ISC due to on car testing. Activated the ISC solenoid with 12V. Blocked blown air in until 12V applied then opened with a "Click". Tried several times without the ISC sticking or anything. Did not seem to leak air when first blowing on hose to 0V on ISC. Guess I need to back probe electrical connections to see if ECU is turning on the ISC during running engine time.
Update:
Back probed ISC and checked to make sure it had voltage present. Ran up to hot temp and watched voltage on DC meter vary from 2.6V to 5.4V depending on bleed screw setting and RPMs. Higher RPMs = lower voltage. Don't have scope or duty cycle meter.
1992 Sidekick, 4 door, 4-spd automatic, 1.6 L, 16 V, MPI