Wow..... .... ....... *blur*
even if u say so... now with that PDF link u gave, i still feel dumb. but it does save me a LOT of typing; i dont have to explain the ISCV using kampung language wahahahahaha. Seriously bro, compared to that PDF, my description wouldve been really lame =.=" . thank you for the research, its really good info.
and yes, with my personal tinkering n close inspection of the ISCV unit itself, there is totally NO problem spraying a cleaner fluid into the ISCV cavity as far as harming electronics is concerned. As described by autoshop101, the "valve" itself is "twisted" (turned is more accurate, becoz no actual twisting action is involved) by applying an electromagnetic field to a cylindrical thing protruding from the valve casing itself. the electromotor is totally isolated & even separable from the aluminium valve casing, so there is no issue of any electronics being exposed to carbon cleaner etc. besides, it is not even electronic to begin with, the socket from the ECU only supplies a signal to determine the polarity of the magnetic field in order to set the pintle valve to a correct aperture.
as long as the cleaner sprayed inside is not some kind of industrial strength chemical like the red ones some car washes use, im really convinced there is no problem with cleaning ur ISCV.
as for having any effect in idling or performance by doing so, that is debatable. im not saying there's no use cleaning it, the fact is usually different car different case. however, seeing that i ended up with a jammed pintle valve myself, perhaps it is bcoz i never cleaned the thing & its stuck with carbon deposits? wakakaka.
Wallahualam (only god knows)
Bump:
This is the ISCV unit from a typical 20V 4AGE. Both SVT & BT uses the same type, altho i cannot say if the part numbers are the same, bcoz i havent compared those :P
The ISCV with the magnetic servomotor screws removed. I noticed from earlier posts that some of u are already aware that the servomotor can be "adjusted" slightly after loosening both these screws. the body of the valve casing & the slightly elongated bolt holes does suggest an allowance for moving the servomotor. one interesting thing is, even without the socket connected while idling, the servomotor has a pre-"loaded" magnetic force. when i left the ISC pintle valve fully closed (low idle) and put the magnetic servomotor back in its place, the idle went up slightly, showing that the polarity of the idle magnets are already set to open the ISCV slightly. once i have the magnet back in place AND reconnected the socket, the idle shot way up (dunno what my ECU is thinking... cacat oledy
)
The pintle valve cylindrical link & the inner view of the magnetoservomotor (lol redneck science term, sorry).
A closer view of the outside linkage to the pintle valve. this assembly is not spring loaded, but when the engine is idling, the vacuum pressure keeps it in the almost closed position (lowest idle speed possible). the range of motion is only about 90deg, makes me wonder how fine the signals must be in order to have 125 positions of air opening :hmmmm:
Therefore this is the metal where the electromagnetic force is applied by the servomotor. The strength and/or polarity changes in the field signaled by the ECU "turns" & "holds" this linkage & consequently the pintle valve to the necessary level of air opening.
Close up view of the magnets inside the servomotor (not its actual name, i make this shit up can u believe it? LOL). As ive said in a previous reply, this unit has a passive magnet even b4 the ECU socket is connected. it affects the idle valve opening even b4 any electrical signals pass thru. So as u can see from here, there are no exposed electronics to be harmed by any type of cleaners. The coils etc are safely enclosed in this solid plastic block which i think is not even repairable. Simply have to replace if this thing goes.
Hope this gives a better insight on the inner workings of the humble ISCV.
...not adjust the screw...loosen the screw, the move the ISCV... :wavey:
