idle control valve

[dark_knight]

a noisy mess

@mechiel: man, your bay is a mess! hehehe.. i hope you are transitioning towards tidying it up. it's safer too.. so that you don't have pipes and wires being fried over the hot engine bits..

@corofin12345: in your 'as it is now' post, that sounded like a shotgun going off..! lol. what turbo/boost are you running..?

 

[mechiel]

The blue one is a vsv vaccuum switching valve I believe also for idle up ( the earlier engine bay picture in this post shows the blue connector on the right not the left like yours so bits have been moved around )

what about the one beside the blue one? It got 2 hoses too...

 

[mechiel]

@mechiel: man, your bay is a mess! hehehe.. i hope you are transitioning towards tidying it up. it's safer too.. so that you don't have pipes and wires being fried over the hot engine bits..

Yeah, I need to figure out the vacuum hoses before I dropped the engine out for spot welding... LOL

 

[Rev]

what about the one beside the blue one? It got 2 hoses too...

Ok this one is a/c related too it controls the idle up that occurs just before the A/c compressor kicks in to take the load off the engine and avoid stall, it is adjustable . Both can be seen in this link http://www.toyodiy.com/parts/p_J_1990_TOYOTA_STARLET_EP82-AGMQY_8717.html
It is important to realise there is a vaccum component, electrical components and maybe a timing component that relate to the issue you are having , I think I have found the 'Holy Grail' of Starlet electrical idle issues but am still testing, so far I have gained 100 rpm on idle but the a/c is supposed to idled up 200 rpm to be stable.

 

[mechiel]

Ok this one is a/c related too it controls the idle up that occurs just before the A/c compressor kicks in to take the load off the engine and avoid stall, it is adjustable . Both can be seen in this link http://www.toyodiy.com/parts/p_J_1990_TOYOTA_STARLET_EP82-AGMQY_8717.html
It is important to realise there is a vaccum component, electrical components and maybe a timing component that relate to the issue you are having , I think I have found the 'Holy Grail' of Starlet electrical idle issues but am still testing, so far I have gained 100 rpm on idle but the a/c is supposed to idled up 200 rpm to be stable.

thanks. but the picture doesn't shows which vacuum hose do they connect to. LOL!!!

in that case, I don't think I got such thing as VSV and such if these 2 are meant for air con...

 

[Rev]

thanks. but the picture doesn't shows which vacuum hose do they connect to. LOL!!!
in that case, I don't think I got such thing as VSV and such if these 2 are meant for air con...

There are line diagrams that show the vaccum pipe connection points some one be be able to post one I dont have the 4efte one.
Otherwise you have to look at engine bay photos and work it out that way.

The following link shows the other Vaccum piping including the hi lo boost system.
http://www.toyodiy.com/parts/p_J_1990_TOYOTA_STARLET_EP82-AGMQY_1708.3.html

 

[mechiel]

apparently, both of the vacuum switch are not meant for air con and i'm not sure what are they being used for until I taking out the engine.

So I gonna buy one switch to wire it up to the air con and do the vacuum...

 

[Rev]

apparently, both of the vacuum switch are not meant for air con and i'm not sure what are they being used for

I find the idle up changes idle for a/c , braking and steering. The worst load is A/c plus when the electric fans for the radiator turn on and a/c fan turns on, spark is effected and idle goes down. The ecu has a pin that should go to the fans to increase voltage under fan load this is also worth checking.

 

[mechiel]

I find the idle up changes idle for a/c , braking and steering. The worst load is A/c plus when the electric fans for the radiator turn on and a/c fan turns on, spark is effected and idle goes down. The ecu has a pin that should go to the fans to increase voltage under fan load this is also worth checking.

i think is best if i redo all the wiring and put in whatever that is left out during conversion...