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I must thank you Brian for your very quick and much helpful answer.Good to see that You could make some common sense from my letter and it seems that You know your business.Well I have a feeling that You try to be a little kind to me saying my english is better than your danish, well my danish is not good either.
Now to the big problem.You have guided me to the fault that I maybe already knew but had placed somewhere in the corners of my brain.The thick green wire that I tried to connect with only a little bit from the fuel computer (maybe 15 centimetres apart), directly when I used that as You described it very well V-thing, to connect the green wire fast and simple I thought in my unknowing mind but quite the opposite it turned out to be.I thought immediately when I saw two copper wires inside the cable, shit,it is the least word you can say, this is not very good.I know when two wires that is supposed to be separeted from eachother touches together some bad things can happen thats for sure.But I had not the slightest clue that it could be such a strange wire.Okay I couldnt connect the signal cable from Halmetern at that point on the green cable I understood.Must fix it only for couple of days I thought until I can go to the car junkyard in my city (some luck that I have a nearby junkyard to go to when I destroy something on my car)and rip out a complete green signal wire and put it in instead for mine that now has lost some insulation and not looks so good.I think that I remember I didnt start the car with that V-thing hooked up on the green cable, it could be bad I thought.I didnt know at that time that the outer wire that goes around the inner is "shieldad", I figured out that with some common sense after I had settled down and with the Haynes.Now it sounds from You it is very important so the green signal wire can work properly.Thanks again I must say.I fixed the connections as good as I could, I had to connect the inner signal wire for itself and the surrounding protection wire for itself so the signal wire has maybe 2-3centimetres without the "shielding", not fine I tell You that and I hope thats why I get those strange and faulty measures in the engine compartment.I hope I havent destroyed anything inside the fuel computer (praise God), I will se after I have changed green wires of course.First on Monday morning I will be at the junkyard, it is many Volvos there so it shouldnt take so much time, then change and hope it turns out well.
You say that I shall pull the connector of the green O2 wire and measure the resistance to ground and it should NOT be 0 ohms, is it in the engine compartment You mean, where the green wire and black (tiny) from O2-sensor connects, I must measure with the green wire disconected from the black, if I understand it correctly (long sentances here).If it turns out to be 0 ohms can I kiss the fuel computer goodbye then or?
Then the T-connector, where do You mean, can the wire have been shorted somewhere ells than at the horrible connection I tried near the fuel computer.
Reference signal, yes I have tried to measure it but now when the green cable isnt like it should be maybe thats why I get wrong measure, I get sometimes 0,062volt about.If the fuel computer has gone by should I get anything at all?
I got these fluctuating measure up and down(engine on idle warmed up with green wire connected to black O2-sensor)everything between 0,0-1,4 volt, but only once yesterday.Maybe a sign that it is the ungentle handling with the green wire near fuel computer thats the problem and a sign that computer is alright but cant send and receive proper signals, I really hope so for a computer is pretty expensive even at the junkyard I think.
Yes the AF-Halmeter is disconected for now and my next thing is to change the green wire as fast as possible.Once again Thanks for your help Brian, I dont think I had figured it out by myself.I write again next week to tell You how it turned out.
Kramfors, Sweden.
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