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1. 

   sluggish/rough/slow acceleration

   The most import thing to do, before replacing a CAT. Is determine why it went bad, and fix what caused it to go bad. Otherwise you'll keep taking out CAT. Driving with CEL on, or trying to fool the ECU (ECM) with 02 extenders, are things best not done. 200K miles CAT should be good condition. If...

   • Words: 390
   • 2001LC
   • Post #10
   • Oct 2, 2022
   • Forum: 100-Series Cruisers
2. 

   sluggish/rough/slow acceleration

   I would check #3 spark plug, before starting again. Make sure it tight! You can then swap coil #3 with #1. Clear codes and see what returns. Or have it towed to shop. #3-BK1 (Drive side of engine (LHD), left as you sit in seat) second plug from front of engine. It's a very easy plug to get at...

   • Words: 98
   • 2001LC
   • Post #4
   • Oct 1, 2022
   • Forum: 100-Series Cruisers