Question about 1993 Jeep Grand Cherokee
Pulse count modulator, there is a half circle of steel in the distributor, when the steel half circle passes a hall effect sensor ( pcm ) it tells the engine to fire on cylender number one. and the other half of the steel circle exits the hall effect sensor it tells it how fast it was turning. so all the other spark plugs fire at the correct time. The other part is that the pcm cystem is part of a coil that is wound around plates of steel if the plates of steel get wet (over time they tend to rust ) the rust swells the steel and the coil gets broken by the expanding rusty steel. so replace the coil portion of the distributor. just follow the singel wire to the block of steel ( coil is encased in rubber or molded plastic. ) but the coil is breaking or getting stretched and bearly touching and when it gets hot the metal expands too. and it fails. just follow the singel wire inside thedistributor to its coil : replace that and your good to go.
Posted on Feb 21, 2009
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Posted on Jan 02, 2017
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