Originally Posted by rama
should be done with engine hot. should realy open the throttle fully also and either stick a spark tester on the plug leads or disconect the coils.
^^^ Ideally I'd agree, but Mike was having probems with #4 cylinder not firing so there's no way of being certain all 4 cylinders are at the same temp.
Spark tester and fully open throttle are essential-though you CAN do it by turning the engine over with ignition off by shorting across the starter solenoid on the engine in question.
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