Failed an Emission test. Trouble codes: P0300 and P0305

1999 LEXUS GS 300
166 MILES
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ELI3000
  • MEMBER
  • 3 POSTS
199 Lexus GS300. Failed an Emission test and the results were;
P0300: Random/Multiple Cylinder Misfire detected.
P0305: Cylinder 5 Misfire detected.

The car has been hesitating and misfiring on take off and/or any type of acceleration. Engine light, VSC off, and the ABS warning lights continue to stay on. It runs ok once I get up to speed, but as soon as I slow down and try to speed back up I feel the same all over again. Please someone help!!
Jun 9, 2012 at 3:43 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Try replacing the plugs. You have a misfire on cyl 5. Pull that plug and check it.
Jun 9, 2012 at 4:00 AM
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