1998 Chevy Silverado lack of power

1998 CHEVROLET SILVERADO
177,000 MILES • V8 • 4WD • AUTOMATIC
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YACKIE72
  • MEMBER
  • 2 POSTS
once my truck gets hot I can not get over 40 mph it backfires and chugs really bad it idles ok
Nov 8, 2009 at 5:40 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Check engine light on? recent repairs? checked back pressur for clogged CAT?
Nov 8, 2009 at 5:51 AM
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YACKIE72
  • MEMBER
  • 2 POSTS
put new cat ,new, egr valve, ait senser,and it still lack of power once it gets hot would it be ignition control mod??
Nov 11, 2009 at 9:30 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Ign module is a possibility think Auto Zone can test
Nov 12, 2009 at 6:43 AM
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YACKIE72
  • MEMBER
  • 2 POSTS
changed the ig. control mod. still loss of power when it gets hot
Nov 14, 2009 at 8:34 AM
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