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OK - I guess Dan's message wasn't clear and I read this after replying to it - While the engine is running, only measure voltage. Also, I think you're right about making sure I use the same ground - I didn't, and instead clipped the ground to the case. I'll redo and use the ECU's ground. I'll also check the other grounds from the engine to the chassis and ECU. I think the idea of substituting a resistor for the ECT is a good idea and will do that as well. Also, I do have a 951 and don't have a cold start injector, but am apparently missing your point? Thanks Art.
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