Tacometer jumping around

HONDA ACCORD
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IBM3554
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92 Accord EX 2.2, 189,000 miles. On cold mornings the tacometer jumps around while accelerating. I can feel the engine surging slightly when this happens. Could it be a ignition problem. What component sends the signal to the tac? Thanks
Apr 11, 2007 at 8:50 AM
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BRUCE HUNT
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If the engine is surging the tach should jump accordingly. The surging is generally related to a vacuum leak or air in the cooling system. Even a lack of coolant can cause this.
Apr 11, 2007 at 9:57 AM
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RASMATAZ
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[quote:c5e4a938a6="ibm3554"]92 Accord EX 2.2, 189,000 miles. On cold mornings the tacometer jumps around while accelerating. I can feel the engine surging slightly when this happens. Could it be a ignition problem. What component sends the signal to the tac? Thanks[/quote:c5e4a938a6]

When the coil secondary winding collapses the control module off signal will go to the Tachometer as an indication of engine speed RPM.
Apr 11, 2007 at 1:40 PM
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