Pigsy
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| posted on 12/8/18 at 11:06 PM |
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It’s all done. I’ve fitted a reverse water pump impeller. Sorting its mount and belt.
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big_wasa
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| posted on 13/8/18 at 05:22 AM |
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So it's now running ?
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Pigsy
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| posted on 13/8/18 at 06:48 AM |
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I have had it running yes thanks. All is working but i need the aux belt to give it a proper run with the water pump pumping. Your list here is
invaluable. It has been very helpful. The thing that I did not understand with the wiring is that the voltage goes to the various sensors and then
back to the ecu which times their use by being an earth switch. I had thought that the ecu put out the voltages to the sensors when it is the other
way around. Probably technically wrongly worded, but I have a simple mind. Thanks again to all who helped me.
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FamilyGuy
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| posted on 15/8/18 at 04:45 PM |
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Can the cooling fan be switched off the ecu pin 68 or do you need a seperate coolant temperature sensor/switch. It makes sense to use the ecu to
control the fan if possible but I don't understand why they would have a seperate switch for the fan mounted in the radiator on the st170.
I stupidly cut off the ecu wire for the power steering load switch input right at the connector. I now need to remove the ecu pin so I can connect it
to the earth. I think I've done the same with the evap solenoid pin so will need to sort that one as well.
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big_wasa
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| posted on 15/8/18 at 06:09 PM |
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You can switch it from the ecu or from a switch in the top hose / rad. You will want the relay from the donor as it has a diode in it or somthing. I
tried with a standard relay and it just would not have.
You want the fast fan pin.
The st170 switch doesn’t actually fit in the rad, they clip it to the back of the battery tray. It’s wired perm live so it will over run with the
ignition of.
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FamilyGuy
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| posted on 16/8/18 at 04:09 PM |
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I have all of the relays off the focus still so I will have to try and identify the cooling fan relay. So I will need to wire the control side of this
relay up to ecu pin 17 and the power relay output (for my setup), and the load side up permanent live and earth. No need for the additional coolant
temp switch and the ecu which has permanent live supply will control the over run. Am I thinking along the right lines?
Thanks.
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big_wasa
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| posted on 16/8/18 at 04:48 PM |
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Yeh it’s a green 5 pin relay. The 5th pin is an extra chassis earth
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big_wasa
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| posted on 16/8/18 at 05:19 PM |
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I may have told you wrong there.
I think it’s pin 68 Black/blue.
Relay PIN numbers.
1) green/blue this is switched live.
2) Black/blue this is the ecu switched earth.
3) Red this is permanent live.
5) this is to the fan motor via a 30a fuse.
7) this is chassis earth.
You need to keep a very close eye on it until your happy it works as it doesn’t kick in until 113 deg and off around 98.
But it works, my turbo Zetec will sit there and cut in and out all day long.
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FamilyGuy
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| posted on 16/8/18 at 09:52 PM |
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Thanks for info, I'll give it a go.
The only thing I planned on doing differently to what you have stated above is to fuse the live feed to pin 3 of the relay and not to the fan motor. I
can't see any issues with this as it is protecting the same circuit but please do tell me if I'm missing something though.
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big_wasa
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| posted on 17/8/18 at 05:08 AM |
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To be honest I would probably do the same. The above is just how it is in the Focus.
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Chris1982
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| posted on 20/8/18 at 10:10 PM |
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St170 cut Down loom
Is this still alive post I am new to this site and need help
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big_wasa
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| posted on 21/8/18 at 05:13 AM |
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Yeh I am still here. 
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Pigsy
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| posted on 21/8/18 at 04:40 PM |
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i. If ecu 56 black/blue—evap pin 2, is the pin 1 to live 12v or earth please?
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Pigsy
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| posted on 21/8/18 at 04:44 PM |
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if 83 green/yellow -- idle air control valve pin 2, is the pin one 12v please?
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big_wasa
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| posted on 21/8/18 at 04:45 PM |
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12v the ecu switches the earth.
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big_wasa
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| posted on 21/8/18 at 05:09 PM |
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quote:
Originally posted by Pigsy
if 83 green/yellow -- idle air control valve pin 2, is the pin one 12v please?
You have found an error in my pin outs. Pin 83 should be black/yellow as per the plug, green/yellow is the switched live side of the solenoid.
The ecu switches the earth side of the circuit.
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big_wasa
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| posted on 21/8/18 at 05:11 PM |
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Pin 1 is the power and pin 2 the earth.
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Pigsy
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| posted on 22/8/18 at 06:56 AM |
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Thanks.
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Pigsy
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| posted on 25/8/18 at 06:15 PM |
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ecu pin 67 Evap canister vent control Bk/Og,
ecu pin 56 Evap purge solenoid valve Bk/Blu.
As far as I'm aware (no doubt wrong), they are wired as above. I have the ecu pin 67 Evap canister vent control Bk/Og with connection plug pin1
being Gn/Red.
As for ecu pin 56 Evap purge solenoid valve Bk/Blu, with what and how is this wired.
your help will be appreciated.
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big_wasa
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| posted on 25/8/18 at 07:10 PM |
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There is no pin 67 ?
There is only one canister purge valve. It has a live and the ecu switches the earth.
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Pigsy
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| posted on 26/8/18 at 09:26 PM |
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Thanks.
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Pigsy
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| posted on 30/8/18 at 09:30 PM |
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Idle too fast
I have the st 170 ecu completely wired in now.Problem: while it starts and fires easily, it idles way too fast. About 2700 rpm. I have fitted the GSXR
750 injection bodies, using the standard injectors and rail, the standard air idle control by using a small bore (+/- 4mm) 4 port manifold that has 4
pipes inserted into the throttle bodies inlet manifold side of the butterflies. From this little manifold, one larger tube runs to one of the air idle
controls ports. The second port next to it runs a tube into an air filter.
It is the same as this Google image:
https://www.s2ki.com/forums/s2000-forced-induction-142/itb-turbo-441249/page2/#&gid=1&pid=2
I have blocked any possible air leaks including around the injectors with a silicone sealant for car engines.
Can anyone think of a solution please?
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big_wasa
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| posted on 31/8/18 at 07:44 AM |
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Remove the idle control valve. You won't need it on the bike itbs as they will be set up for idle on the screws. And 're check for air
leaks. You will also need to balance the itbs.
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Pigsy
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| posted on 31/8/18 at 05:57 PM |
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Thanks. I will check again and run it without the idle valve.
The itb's are already balanced and barely open.
Will the ecu not control the idle anyway using fuel enrichment?
What about a choke?
I have a manual choke setup and it makes no difference at all. I disconnected it but can easily reconnect it.
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Pigsy
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| posted on 8/9/18 at 07:20 AM |
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Any suggestions on a rev counter connection. Connects as a Smiths modern type. From coil pin 26 or 52? Needs 12v negative earth.
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