duct tape & zip ties
Join Date: Jul 2006
Location: Willis, MI
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You most likely are getting an over boost code. When you let off your throttle the over boost situation goes away and there for the light goes off. This is common when running a chip. You can make a boost fooler with an air pressure regulator. Hook it to your air compressor set it at 20psi. Then with a couple barb fittings you can install it inline with the map sensor. Now your map sensor will never know when you go over 20psi and will prevent the cel from coming on from an over boost code.
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Your Actions Today, Decide Your Future Tomorrow
2005 6.0 Crew Cab Long Box Lariat, current truck
2004 6.0 destroyed by contaminated fuel
2002 7.3L burnt