Shudder/stutter

2004 CHEVROLET TRAILBLAZER
126,000 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC
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JIMBO.D
  • MEMBER
  • 2 POSTS
Vehicle shudders/stutters on slight acceleration. Map sensor replaced, did not help. Hard acceleration. Has no issues. What could the issue be?
Aug 21, 2016 at 10:26 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Have you checked the computer for codes yet?
Aug 21, 2016 at 10:56 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Could be spark plugs or a coil failing.
Aug 21, 2016 at 10:57 AM
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JIMBO.D
  • MEMBER
  • 2 POSTS
No check engine light yet. Will check the plugs this evening. Thanks.
Aug 21, 2016 at 11:03 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Alright keep me posted.
Aug 22, 2016 at 5:24 AM
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