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

Asked by deruyter007 Jan 20, 2015 at 01:08 PM about the Chevrolet Silverado 2500HD

Question type: Maintenance & Repair

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

3 Answers
4,695

Josh answered 9 years ago

Did you Check Compression. Checked for Shorted or Opened Circuits on your Fuel System and Ignition System.

Mark helpful
4,695

Josh answered 9 years ago

Make sure you run some fuel injector cleaner just in case the injectors are clogged!

Mark helpful

Your Answer:

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