Northstar Engines and System Technical Discussion Discussion, Disconnecting EGR in Cadillac Engine Technical Discussion; Will I get more Power and lower fuel consumption?
Is it risk for the EGR valve will stuck open?...
Automobile(s): 2002.5 F55 STS/64500mi, 2004 Ford F150 SuperCab4x4
MD Eastern Shore - Kent Island
Re: Disconnecting EGR
EGR is used to lower combustion temperatures by selectively diluting the fuel/air charge. It is fairly benign, and does not operate under full throttle conditions so you'll never really know when it is operating. Because it does affect part-throttle combustion, disconnectoing it - or a stuck/sticky valve - will usually give you a part throttle or off-idle ignition ping - sometimes constant, sometimes only three or four pings.