by cwaugs » Sat Mar 14, 2009 8:37 am
Problem is the DPFE/EGR/AIR systems that use the fore-mentioned high priced hoses are totally dependent on there being no actual exhaust FLOW through them. If an AIR system check valve or a DPFE sensor diaphragm ruptures and allows actual exhaust gas to FLOW through the hoses, they fry in a relatively short order due to the high temp's. The AIR check valve is counting on the pump to occasionally blow air through it, as the DPFE sensor and tubing is far enough away from actual exhaust heat, that they can survive and do their job of monitoring pressure differentials. At least here in Florida, they are replaced quite often because of the above mentioned circumstances. Be careful [:)
America don't run on gas, it runs on greed