Technical Tips > Post 84

C6 Z06 cam angle sensor

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Vettech:
I think your opening post indicates what is needed.

The car fails at your house, but works perfectly at the mechanics.

Your house is located on a Serpentinite Lens in the Rocky Beach Metamorphic Melange.
This melange is know to draw the Southern Diplex Magnetic fields into these Lens Vortex's.
This then interferes with electromagnetic radiations, esp where angelization are concerned.

There is nothing you can do except - get the mechanic to make space in his garage and store your car there between uses.

Where would we be without modern electronics !?....
 

bfit:
Ahhh yes the Putin triangle,

jagsy:
Update
My mechanic brought his scanner to the car yesterday and it was the first time he has experienced the non starting issue for a prolonged time and was able to scan and see what was happening!!

All sensors, voltage, fuel, throttle blade working correctly  :(

He checked the relays and fuses. All ok   :(

He then checked for spark and injector firing. Good spark but no injector firing signal. AHA we have what's causing it but why?

Tried starting again and the car started. Had the mechanic moved the injector/coil wiring harness - he wasn't sure.

The injector/coil wiring harness feels hard and brittle as though it's been subject to heat. Moving the harness is hard and can almost hear cracking whenmoving it!!!!

We are now going to test the harness and replace it to see if that eliminates the issue.  Further testing of the main harness back to the ECU may ne needed. We don't think it's the ECU as when it does run all is OK.

With the engine running I took the car to the mechanics workshop, but needed some fuel on the way.  After fuelling, at the garage, the car wouldn't start again!!!!  I tried 3 times.  Opened the bonnet, took the engine cover off, wiggled the wire harness and the car started!!

We have an area now to look at to see if that is the problem.

Vettech:
C6 has sequential Injector firing, not like the C4's with TPI, firing all left bank then all right bank.

It would be unusual for wiring to effect all injectors, a wire to one injector would not cause failure to start - more likely a miss whilst running. So I dont have a cct dia, but would be inclined to look for a common wire - say a common earth return etc.

In the C4 the injectors have power via 2 dedicated fuses to all, whilst ever in the run position.

The other side of All Injectors go to two outputs on the ECM - these are basically electronic transistor (SCR) switches, which switch earth on and off as required. I use my daughters stephiscope to listen to the injectors firing, some cars are noisey enough to hear without it.

If you loose All injectors I'd be looking for a common denominator - and the ECM or computor or what ever a C6 has, could still be in the running for culprit. I hope not.

Best of Brittish - sorry Best of Welsh.

jagsy:
Update and hopefully problem found.
The wiring I talked about last had a bad connector with one spade badly corroded and burnt. That has been replaced and other spades checked. All.gopd so far but will need to do local testing to be confident all.is well.

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