Question about 1999 GMC Suburban
Burb is missing. put new fuel filter in plugs, wires,may be water in fuel not sure.
If one cylinder is missing at idle, it would be useful to know which one. Pulling the plug wires one at a time with insulated pliers would tell us if one does not cause a change.
It could be a fouled plug.
You could switch plugs with another, to verify.
If not spark, could be fuel.
If throttle body, then not likely.
If individual injectors, then pull whole rail off and see if all injectors fire, spray pattern like cone, and none dribbling.
If none of above, then consider intake leak, collapsed lifter, valve adj, etc.
Posted on Apr 22, 2010
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Posted on Jan 02, 2017
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