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Originally Posted by kbatson
I simply disclosed it as a ignition related problem due to the fact that every time I physically check it for spark it had a great blue colored spark! But it must fail under load producing a weaker and/or no spark condition! The car has 220 K on it so I don't feel the injectors were a waste of money!!!! I have to say that the cis injection system is a difficult system to diagnose. Many of the parts that go bad give the same symptoms!!!! I found the problem myself and was quite happy that this car is out of my life now!!! Thanks for everyones help!
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The spark being blue was indicator number 1 that is was weak, it should be a bright white and it will jump about an inch to ground form the coil wire end. MB’s test procedure is fallible, if you follow the test steps that are written you will never suspect the coil as the cause.
Performing the available voltage test will always nail a weak and or dying ignition coil, however you do have to have a way of testing the coils secondary voltage. I believe you can obtain a thumb screw type device at the local auto parts store which tests secondary voltage via the gap that you manually set. Not a bad investment for the DIYer.
