But this took some troubleshooting to find out what was going on.
First of all I checked all the sensors and wiring and figured out that the ECU wasn't wired up correctly. I had not attached the white starter wire to the switched live so once I did this the ECU lit up correctly.
Still no joy on starting....
Now I had data from the laptop I cold see the ECU thought everything was working ok so I moved onto the theory that there was an ignition issue. I took off all the HT leads and checked that they were all seated correctly, which they were. Luckily I had a spare spark plug so I could attach this to each lead in turn and check I received a spark, which I did.
At this point I was thinking, "great that everything is working but what &%*^& is wrong" so a quick post on the forum for ideas and the general consensus had to be it was firing order.
Thanks go to Bob and Alan from the forum for providing the information below. Its helped me realise I had simply connected the coil wires in reverse order.
Basically the coil wires have the same 3 colours into every connection (pink, brown and black) but the fourth wire changes per coil. The number below relate to cylinder numbers shown in the picture.
1 - Purple 3 - Blue
5 - Green
7 - Red
2 - Red
4 - Green
6 - Blue
8 - Purple
One press of the button and she turned over then fired up. You can see from the smile on my face that I was pleased it started.
But there was still an issue.....
Listen carefully and you can hear a high pitch whine/whistle coming from the engine.
Back to the troubleshooting.
The first think I though of was are all the fluids where they need to be?
Low fluid can make a similar noise as the pumps work so I checked all the fluids such as power steering, brake servo and clutch servo and the only fluid which was a bit low was the power steering. Topped up .. no change.
Then I checked that nothing was rubbing on the belt and there was nothing touching the wings/vibrating....no joy.
I left it for the night and discussed it a little more on the forum and when I came back to it I first noticed a small water leak from one of the jubilee connections. Tightening this stopped the leak but not the whine.
Aaron on the forum has suggested it could be the vacuum issue and sure enough I had made a small change to were the tubes were connected. On the first fire I had capped off the valve covers as I had been advised to do that by Kyle at Tim Adams Racing however for this start I had connected all the breathers together and put them to the manifold following an article I had found on the net.
It turns out doing this creates a big whistle.
AK normally connect any valve breathers to the intake manifold but some further research shows what you are supposed to do.
1) Passenger side valve breather on rear of engine should be capped off, or you can connect to drivers side rear valve if you have one or intake manifold if you prefer (GM leave it capped from factory)
2) Drivers side breather valve connects to tube on top of throttle body (if fly by wire) or tube on intake tube (if cable throttle)
3) connect from tube on valley cover to tube on manifold (behind throttle). You can run this through a catch tank if you want. LS6 and later should have a built in PCV valve in the valley cover but otherwise you will need to add a PCV valve in line.
I'll be reconfiguring this at the weekend to get everything correct.
One last issue to figure out is why the starter motor seems to bog down on first ignition before it starts the car, again I'll look at this at the weekend.
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