Quote:
Originally Posted by AncientTurbo
Hi, thank you for the comments on the differences between the 230ET and 230FT control boxes - I was looking for the Ignition Control Box! I've been working outwards from the non-sparking plugs and am happy with the coil - the distributor and rotor arm - and the TDC/rotation output. But there my knowledge and testing have hit a brick wall. I have run all the 'Haynes' tests (from page 157/158) and they seem OK. What I can't resolve is which of those tests actually prove the ignition amplification that pushes a decent VAC through to the coil primary wiring - which clearly I am not getting. One flow chart I have followed says that the Power Stage is the culprit. But the Power Stage in our cars seems only to cover the fuel injectors? Just wondered if you had any thoughts?
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You say nothing about the LV side.
The Radio Suppression relay on the 760 Turbo is also in circuit for the ignition although not shown on the Haynes diagram as that is for the 740. It is under the bonnet on nearside on my car and identical to the electic fan relay if you have air conditioning so they can be swapped for testing.
In addition the Motronic relay is in circuit, on the main relay board inside the car.
Then there is the ECU itself which contains a built in power amplification stage. I bought a second hand one to test with on a swap out basis.
If those are all working ok and there is no wiring problem, you should be getting the corect LV feed to the coil as far as I know.