Re: Help! 2003 Turbo Engine problem!
When was the last time the spark plug wires or the plugs were changed? It sounds like the wires are arcing causing the engine to misfire when there a load on the engine. The backfire is cause by unburnt fuel in the cylinder on the exhaust stroke and the valve is open and the plug fires. The rotten egg small is unburn fuel your cat converter couldn't deal with it.
Hope this helps
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