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**Shane@DBPerformance** · 08-12-2011

If you are on the stock 450s, then you shouldn't have to do anything. If should run fine with a stock tune. That closed loop error could be caused by a bad o2 sensor, a boost/vacuum leak, bad coolant temp sensor reading.

08-12-2011	#8
Shane@DBPerformance formerly ecoli Join Date: Oct 2003 Location: On the dyno Posts: 4,892	Re: Need help with tuning If you are on the stock 450s, then you shouldn't have to do anything. If should run fine with a stock tune. That closed loop error could be caused by a bad o2 sensor, a boost/vacuum leak, bad coolant temp sensor reading. __________________ www.dbptuning.com