Cosworth ISCV
06-12-2006, 06:15 AM
#1
Too many posts.. I need a life!!
Thread Starter
iTrader: (3)
Join Date: Sep 2005
Location: Denmark
Posts: 767
Likes: 0
Received 0 Likes
on
0 Posts
Cosworth ISCV
Is it possible that the ISCV can make the engine run as high as 13-1500 r/min at idle??? Sometimes constant, sometimes going to normal after af few secs or minutes 
If the ISCV can not make this high revs.. it MUST be the ECU that make sit doing this.. correct?
With the ISCV unplugged it revs 600-800 cold and 850 when its getting hotter
If the ISCV can not make this high revs.. it MUST be the ECU that make sit doing this.. correct?
With the ISCV unplugged it revs 600-800 cold and 850 when its getting hotter
06-12-2006, 08:55 AM
#2
PassionFord Post Troll
Join Date: Jul 2003
Location: Suffolk
Posts: 2,582
Likes: 0
Received 0 Likes
on
0 Posts
With the ICSV disconnected you are running on the throttle stop so if connected you get raised idle above normal then either the ecu is sending a signal to the ICSV (spurious) of the ICSV itself is sticking open.
Often they can become sticky caused by a build up of carbon inside.
Best thing to do is to whip it out and give it a good clean in some decarbonsing solution.
Then retry it.
Good luck.
Often they can become sticky caused by a build up of carbon inside.
Best thing to do is to whip it out and give it a good clean in some decarbonsing solution.
Then retry it.
Good luck.
06-12-2006, 09:10 AM
#3
Too many posts.. I need a life!!
Thread Starter
iTrader: (3)
Join Date: Sep 2005
Location: Denmark
Posts: 767
Likes: 0
Received 0 Likes
on
0 Posts
That is what I have done.. still the same.
All sensors apart from the tps and iscv is new. Just fitted after a head rebuild.
The iscv is not sticking when pushing it carefull with at screwdriver (holding it in my hand).. the piston can move very easy. But the condisitions inside the throttlebody may be different afcause.
The tps work according to my multimeter.. 42-48ohm closed to 630 ohm fully open, with NO glitches
But... CAN the ISCV cause idle in the range of 12-1500 r/min???
still the same.All sensors apart from the tps and iscv is new. Just fitted after a head rebuild.
The iscv is not sticking when pushing it carefull with at screwdriver (holding it in my hand).. the piston can move very easy. But the condisitions inside the throttlebody may be different afcause.
The tps work according to my multimeter.. 42-48ohm closed to 630 ohm fully open, with NO glitches
But... CAN the ISCV cause idle in the range of 12-1500 r/min???
06-12-2006, 09:29 AM
#5
PassionFord Post Troll
Join Date: Jul 2003
Location: Suffolk
Posts: 2,582
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by JanDK
All sensors apart from the tps and iscv is new. Just fitted after a head rebuild.
The iscv is not sticking when pushing it carefull with at screwdriver (holding it in my hand).. the piston can move very easy. But the condisitions inside the throttlebody may be different afcause.
The tps work according to my multimeter.. 42-48ohm closed to 630 ohm fully open, with NO glitches
The iscv is not sticking when pushing it carefull with at screwdriver (holding it in my hand).. the piston can move very easy. But the condisitions inside the throttlebody may be different afcause.
The tps work according to my multimeter.. 42-48ohm closed to 630 ohm fully open, with NO glitches
If the ECU sends a duty cycle to the ICSV to open then it will (either a faulty signal or a load on the engine), it could be down to another sensor giving incorrect information to the Ecu.
I'd suspect the TPS.
Measure the pins at the ecu with the TPS multiplug still connected, pins 11 and 17, 0.25 to 0.3 volts DC.
Have you done a error test to ensure all sensors are ok?
But... CAN the ISCV cause idle in the range of 12-1500 r/min?
06-12-2006, 06:03 PM
#6
Too many posts.. I need a life!!
Thread Starter
iTrader: (3)
Join Date: Sep 2005
Location: Denmark
Posts: 767
Likes: 0
Received 0 Likes
on
0 Posts
Hmm.. this will be next step then!! It have been teasing me, on and of for about 8 months now. But was not sure that it was the ISCV cause of the very high revs
Thank you guys
...
Thank you guys
...
Thread
Thread Starter
Forum
Replies
Last Post
Focosmitch
Ford Focus RS Parts for Sale.
5
09-03-2016 01:03 PM
Adam Graham
Restorations, Rebuilds & Projects.
7
06-09-2015 06:04 AM
