1999 Chevy Silverado why would my engine run got at idle an

1999 CHEVROLET SILVERADO
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ROBERTBASSIN5
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  • 6 POSTS
Engine Performance problem
1999 Chevy Silverado 6 cyl Two Wheel Drive Automatic

why would my engine run good at idle an bad when give it gas? But after about 20min of driving it gets better. I have ran injector cleaner through the gas tank, new fuel pump, new fuel filter, new plugs, new wires, new cap and rotor. So any ideas?
Mar 2, 2010 at 7:08 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
hi, if your idling in park or neutral, not much load on the engine, that changes, when you put it in drive. I'd use a gage and check fuel pressure. If you have the spider fuel system and it needs cleaning, injector cleaner in the gas tank, may not help much?
Mar 2, 2010 at 7:43 AM
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ROBERTBASSIN5
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This problem exist in park.
Mar 2, 2010 at 8:03 AM
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