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dhadden dhadden is offline
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Join Date: Apr 2017
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1980 911sc Euro with 964 Turbo XDI twin plug ignition

Is there any information on the web about XDI twin fire ignition system adjustments. I have a 964 turbo with twin plugs. Just changed them out and the car starts right up and runs strong, however I feel that there is a slight miss fire with one or two of the plugs. Is there a way to use an voltmeter on the XDI box to determine which plug is acting up? Or any suggestions short of pulling them all back out again. When starting cold it has a slight popping like its not firing on all the cylinders. When it warms up it appears to be less pronounced and since there are 12 plugs it is hard to detect from all the power it puts out. But no one in Kansas City seems to have a clue as to sharp shooting the XDI system. The cars starts right up the first time every time but doesn't seem quite right ... The power band isn't smooth and quick. Please help...
Old 10-28-2017, 12:27 PM
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