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Post by zoona on Jan 14, 2020 13:10:42 GMT
I am finally putting my car back together ('93 1.6), and have put the loom into the car.
Not everything is connected yet, but I wanted to get the main engine loom in and tested.
When I turn the ignition to position two there is a clocking noise from the alternator (not happening in position 1).
I have unplugged it, and the problem goes away
It still clicks if the main 12v cable is connected, but the plug is removed.
I have never been good with electrics... Can anybody tell me what I may have done/missed, or what I can check to diagnose?
Thanks
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Post by zoona on Jan 14, 2020 13:17:39 GMT
Hmm. It has stopped now. I just disconnected, and reconnected it.
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Post by zoona on Jan 14, 2020 13:45:04 GMT
so, i think it is the ISC valve and not the alternator.
when i unplug it, it stops clicking.
am i going mental?
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Post by wannabe on Jan 14, 2020 15:40:07 GMT
The ISCV clicks??
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Post by zoona on Jan 14, 2020 16:03:22 GMT
Well... I always thought the ISC valve was the bit labelled 'air valve' on this diagram. But after looking at lots of diagrams, it seems the isc is the bit at the front... So I am just using that terminology. Anyway, I think it's that. It stops when I remove the plug to it. But I can't actually say for sure it is that clicking. I have tried touching everything to see if I can feel it, but I can't. It still does it when I turn the car in, but stops after a while. Then it starts again if I turn in the heart blower. Could it be a shagged relay or something? The loom is not yet all in place, so o will wait until then. But things seem to work, and I can connect to the ECU with my phone. I may have asked for help too early. In short, I have no idea what is going on. But I think I need to get everything in place before trying to diagnose problems.  |
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Post by Zed. on Jan 14, 2020 17:46:55 GMT
you may be missing an earth connection?
below wiper motor, on back of engine / inlet manifold area (ish?) and by pedalbox by relays???
I deleted / blanked the 'air-valve' (thermo-valve) in the idle-speed circuit & blanked the isv on the inlet in my '91 Eunos...
Rich.
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Post by dadbif on Jan 14, 2020 18:15:19 GMT
I’d leave the battery disconnected until all the loom is in place with earths connected, then try it out, you probably have an incomplete circuit somewhere and could potentially harm things...
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Post by zoona on Jan 14, 2020 18:19:07 GMT
Earth was my next guess, which is why I thought I should get further before panicking...
What are the downsides to removing idle valve?
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Post by zoona on Jan 14, 2020 18:19:37 GMT
I’d leave the battery disconnected until all the loom is in place with earths connected, then try it out, you probably have an incomplete circuit somewhere and could potentially harm things... Yeah, the more I fiddle, the more I think that is a very good idea... |
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Post by Zed. on Jan 14, 2020 19:20:44 GMT
What are the downsides to removing idle valve? erm, need to hold the throttle for ~2 mins after coldstart before idle stablises? less to go wrong  ~Becaus racecar? and, because I did    shows the ghetto-temporary bodge to seal the isv from the intake-pipe, I was going to make a blanking-plate for the throttle-body but this was easier as I didnt have any plate to hand... tidies up the coolant pipework as an added bonus......... I left the isv connected electronically to prevent possible 'fault-codes' but thats shortly going to be a different matter when I fit the itb's & diferent ecu  Rich. |
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Post by wannabe on Jan 15, 2020 11:12:37 GMT
Is that a Coil On Plug conversion, Zed.? |
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Post by Zed. on Jan 15, 2020 11:22:53 GMT
Is that a Coil On Plug conversion, Zed. ? Yup that was the ‘mk1’ cop loom...  when I swap ECUs I’ll be Re-wiring the car so will be making a new engine loom with another p&p cop loom that can be removed to run standard coil packs for emergencies Rich. |
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Post by martiny on Jan 15, 2020 11:32:24 GMT
I'm not completely sure clicking from the ISC valve is a problem. It will click when the valve hits its end stops and you probably barely hear it when the crossover tube is attached to the throttle. (Just a guess but is the pipe off the throttle at the moment?)
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Post by zoona on Jan 15, 2020 11:50:28 GMT
I'm not completely sure clicking from the ISC valve is a problem. It will click when the valve hits its end stops and you probably barely hear it when the crossover tube is attached to the throttle. (Just a guess but is the pipe off the throttle at the moment?) It's not... But there are other things not connected. Going to get further before I try to start investigating... |
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Post by zoona on Jan 15, 2020 11:51:14 GMT
Is that a Coil On Plug conversion, Zed. ? Yup that was the ‘mk1’ cop loom... when I swap ECUs I’ll be Re-wiring the car so will be making a new engine loom with another p&p cop loom that can be removed to run standard coil packs for emergencies Rich. I have all the bits to do this too. But I have had those bits for two years and not done anything with them. I really need to have a list... |
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le sigh