1999 Renault Laguna firing

1999 RENAULT LAGUNA
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GARETHW78
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  • 1 POST
Engine Performance problem
1999 Renault Laguna 4 cyl Front Wheel Drive Manual

how do i find out witch cylinder is not firing
Mar 7, 2010 at 2:30 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Get an insulated glove remove plug wires one at a time while engine is idling and ground the wire to the engine-A snapping blue spark should be present-

When you remove the wire, the RPM should drop aleast 150rpm if not that cylinder has a problem
Mar 7, 2010 at 2:37 PM
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