ISV Control not coming on

Hi guys, finally got the timing sorted and the is engine running fairly good.

Problem is so far I've had to wind the throttle stop out to manually make it idle. Otherwise it just dies when you release the throttle.

Ive tested the ISV and it works. But there's no power getting to it.
Ive followed the white and white.black wire from the ISV and they go into the lil control box in the cab.


Whats the first thing to test to work out why its not being turned on?
When Its idling manually by holding the throttle slightly open, when I press the lil button on the throttle (as if it was closed) the engine dies??

Any ideas guys?

 

check the wire and sender on the side of the head,the one with red/green wire if this is broken it wont idle as that is the temp sender for the isv relay
p.m me your email and ill send a diagram with the pinouts for isv

 

as neil says, check both wiring and sender. then check the throttle position switch

 

The idle circuit is powered from a red wire that is connected near the coil IIRC. Had major issue with idle on my old kr. You have to set idle with the idle screw 1st with red wire disconnected. then connect it up. Also as said above make sure temp sensors are ok. mine would idle at 2.5k and once the sensors where swapped it as fine.

 

isv pinout

pin 1--red/black to coil
pin 15--black to fuse 18
SAS--brown/black to overrun cut off
T--green/red from temp sender
St1--white to tsv

LS--black/yellow-position 3 on throttle switch
31--brown/white to rocker cover
K--green to 2 pin connector
LH--white/green to 6 pin connector
St2--white/black to isv

 

Thanks guys, I take it this is the ISV control box in the cab

pin 1--red/black to coil
pin 15--black to fuse 18____________________How does this connect?
SAS--brown/black to overrun cut off__________Wheres this again?
T--green/red from temp sender______________Which temp sender?
St1--white to tsv

LS--black/yellow-position 3 on throttle switch_________Wheres this?
31--brown/white to rocker cover___________________Does this have to be on the rocker?
K--green to 2 pin connector______________________ Wheres this?
LH--white/green to 6 pin connector_________________Where this?
St2--white/black to isv


As im sure you can tell im not that well up on wiring pins etc

Can someone confirm what each of these should be plugged in to please?

 

yes its in the cab like i said send me your email and i can send you the pic of it all
sas goes via d7 on the back of fusebox and to orco which is the grey thing on the injection boot
the temp sender with the red/green wire on the head,usually one of the left hand side ones
ls goes to the throttle switch on the throttle body
k and lh forget those i dont think there used
brown/white comes out of the loom near coil and goes on rocker yes

 

Cheers dude, Found a pic of my head senders
Plus the thermo time swtich under the coolant pipe

my email addres is macetheace2004@hotmail.com




I have a feeling something is not conected somewhere causing the ISV system not to cut in.
Would this explain why when I press the throttle switch it cuts out? As when I press/release it with the ignition on I can hear clicking from of the valve things attached to the air box

So basically Ive got to check where each wire is going from the ISV box, once i know they are all in the right places and if it still doesnt work, could it be a sender on the head that is faulty?

 

H1-red/yellow--temp guage
H2-green/red-isv control
H3-blue/white--fei control(ecu)
H4-gree/black--oil tem guage for mfa
to check head senders put multimeter accross the spanner flats and the inner terminal and should be 1000 ohms at 20 degrees

 

Cheers Neil, So are H1 and H2 different types of sender? As during the rebuild I snapped one of them off and replaced it with 1 from another 16v but I might have mixed the two up?

Also does the brown/white wire have to be earthed on the rocker cover as at the moment mines earthed at the multipoint by the fusebox?

 

no H1,2 and 3 are all the same ones H4 is different

 

Ahh cheers, I take it my H3 must have been replaced at some point in the past. Ran fine in the donor car so that should be affecting it.

So you say the ISV should buzz constantly when the ignition is on? As I tested it by putting 12v to it and it clicked like a solenoid, but I imagine it gets a varied feed of power making it open to different amounts etc?

Also the brown and white wire from ISV control, does it have to be on the rocker cover?

Cheers Neil

 

not sure if it HAS to be on the rocker but thats where it origionaly is,i suppose as long as its on a good earth should be ok
isv should buzz with ign on,not sure you can wire it up across the battery,i think its controlled by resistance not voltage iirc and usually has a steady resistance

 

ok, so what would be the best way of testing the ISV with a multimeter?

 

it needs to be working first so id concentrate on that ,then if it works and runs i wouldnt bother doin checks unles you still have idle issues

what colour wires are on those plugs inh post 7 g,h,i

 

Ill double check the ISV works, pretty sure it does. But theres still no power getting to it anyway as when I put the multimeter on the wires to it it registered nothing.
I cant remember without looking at them, Im pretty sure they're all plugged in to something but H isnt, someone told me that I dont need that one apparently

 

it wont work if theres no power to it,you have to make sure theres power into the isv relay first or your p155ing in the wind,make sure it has at least an earth and ign live and clicks with ign on

 

soo the ISV control box should click when ignition turns on? As when I checked that last night it didnt do anything, but I didnt know if it was supposed to

Slowly getting to the route of the problem Ive been pi55ing in the wind most the way through this 4 year project haha