stft at99.2%,p0300 code,changed 2 after cat sencers checked for air leaks-none,checked fuel pressure,new pluges&wires,both cats are hotter on outputs
code only comes on while on the move-off atslow or stop.changed maf,plugs&wires,b1-s2&b2-s2 have been changed.looked for air leaks atpcv...cleaned throttle
Did you Check Compression. Checked for Shorted or Opened Circuits on your Fuel System and Ignition System.
Make sure you run some fuel injector cleaner just in case the injectors are clogged!
found ground green-cut off end replaced end;then added an extra one. tomarrow will tell more.
Looking for a Used Silverado 2500HD in your area?
CarGurus has 28,810 nationwide Silverado 2500HD listings starting at $2,295.
Search Chevrolet Silverado 2500HD Questions
Chevrolet Silverado 2500HD Experts