1999 Chevy Tahoe Hesitation and Bucking

130,000 MILES • V8 • 4WD • AUTOMATIC
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MIKEDIPIETRO09
  • MEMBER
  • 1 POST
I have been having an ongoing issue with the engine bucking and misfiring etc when it rains...thought I had a bad cap, or wires so I replaced them. Ran fine for a while and now I am having the issue again only this time it's even happening when dry. My check engine light is on but have not checked the codes yet. If I am at idle it's fine and if I am aggressive with the throttle it runs like a champ, but when I am at cruising speed and just keeping the throttle level it begins to stutter and buck etc...in addition when running at highway speeds, 75-80 it can start bogging down and again bucking. Any thoughts would be greatly appreciated. Thanks!
Aug 20, 2010 at 6:31 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check engine light:

Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.
Aug 20, 2010 at 1:04 PM
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