Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, 2005 - 6.0L - EGR Valve Replacement in Cadillac Escalade Forums; Originally Posted by Old Timer
Thus the name: Old Timer... How does one get away without a fuel filter ? ...
Thus the name: Old Timer... How does one get away without a fuel filter ? it has to have the "Sock" on the pickup in the tank... but no other filter ? So... were does one go to think routine service is done on the fuel delivery system ? Pour the injector cleaner to it a couple times a year ? No egr, no fuel filter... all this is OK with me... I never missed an egr valve anyway, thought they ran better without... I'm just looking to make it run as good as it can with what it's got... Thanks The Old Timer...
There is a strainer on the fuel pickup
I use seafoam fuel system cleaner and it works great(also can be used in the oil)
Originally Posted by Skier-24
I also intermittently get codes P0171 and P0174. Clean the MAF sensor anyway. Looking clean might not be clean enough. My Expedition would have these codes. I cleaned the MAF sensor a a couple of times more after I thought it looked clean. Never had another problem with it. MAF sensor could also be faulty.
P0171 is engine coolant temperature (ECT) sensor curcuit low voltage
P0174 is fuel trim system lean bank 2