2002 Renault Megane Emmisions & rough idle

2002 RENAULT MEGANE
85,000 MILES • 1.6L • FWD • MANUAL
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ALESIAB
  • MEMBER
  • 1 POST
At idle car is shaking vigorously, chugging when driven, strong smell of sulphur from exhaust & exhaust is rattling a little, some loss of power when accelerating too... This all happened very suddenly car was fine earlier in the day.
May 30, 2014 at 8:50 PM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,355 POSTS
This is typical of a misfire related to worn spark plugs, wires, or ignition coil. By driving it like that, the excessive unburned fuel has seriously overheated the catalytic converter and destroyed it. That is what is causing the horrible smell now. The first thing to do is address the misfire, otherwise a new catalytic converter will also be damaged. The Check Engine light should have been flashing to indicate too much fuel was going into the exhaust system.
May 31, 2014 at 4:21 PM
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