512tr no ignition fire at 7and 11

I am not getting spark to 7 and 11 with my inductive timing light.

Any thoughts?

I pulled the wires and all have 6.2 k ohms. I swapped the coil packs and nothing changed.




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Did you swap ignition module ..clean ignition module contacts

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I swapped the module from the other side. Results still the same.

Possible crank sensor or cam sensor specific to this bank?


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If you mean that you swapped the complete coil + ignition power assemblies (while they were still assembled together), but still had no spark on 7 & 11 = not a good thing. The easy thing to do next would be to unplug/replug the Motronic ECUs just to wipe those connections, but the next level would be to swap the Motronic ECUs and see if the problem follows one of those, or not.

 

New plugs solved the problem.

Prior to this I had found corrosion in the ignition cable connectors. Cylinder 7 connector had green corrosion and no conductivity on a volt meter. Once I had replaced the cables and bad connectors, I thought it would solve the issue. (All wires around 6.2 ohms)



Turns out that I had to go a step further and get new plugs. Oddly these corresponded to the bad wires.


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Look at the bad lead…the rotted green one. All the others are clean copper.

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