Question about Chevrolet 3500
With the new Duramax that is on your 2003, your going to need a tech2 scanner to address the issues. There are just to many things that can cause your not to have any power from your accelerator peddle.
Have you checked your thottle position sensor (the one on the pedal) the correct name is the APP(Accelerator Pedal Position Sensor). Sounds like there is a dead spot in it. According to alldatadiy, it says to check it with a scan tool without starting the engine, just have the key in the run position.
That way you can use your hand and not your foot. As far as the rpm going up and down, that is probably the fuel pressure regulator valve doing that and it's called a loping idle. some trucks do it so bad that you can hear it.
Long shot, but check your MAF sensor for damaged wire leads and try cleaning it. Regardless your going to need a tech2 scanner as mentioned and here is a link to your engine's wiring harness to your 2003 Duramax.
Thank you for using fixya and keep me posted.
Posted on Apr 27, 2010
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Posted on Jan 02, 2017
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