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Running rough on the big end

Tiny
MITCHEMX5
  • MEMBER
  • 2002 PONTIAC MONTANA
  • 220,000 MILES
My minivan is a 2002 Montana Pontiac with 220,000 miles. Tune up 2 to 3 years ago. Runs great. Just beginning to "chug" and hesitate in acceleration around 40mph and beyond. Consistent hesitation and slight but noticeable "chugging". MPG appears to be fine/average. Possible gas flow problems? I can change the gas filter. But WHAT do you recommend for cleaning the injectors/gas line."IF". That's the problem.? Any other suggestions of what it could be?
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Monday, August 29th, 2011 AT 12:29 PM

4 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check engine light coming on?
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Monday, August 29th, 2011 AT 1:17 PM
Tiny
MITCHEMX5
  • MEMBER
  • 3 POSTS
No check engine light.
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Monday, August 29th, 2011 AT 2:31 PM
Tiny
MITCHEMX5
  • MEMBER
  • 3 POSTS
I did add some Lucas Gas treatment about a week ago. That's every now and then. Not consistantly.
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Monday, August 29th, 2011 AT 2:34 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Techron by Chevron very good injector and valve cleaner also clean MAF sensor in air snorkle. And clean throttle body this will help overall performance
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Monday, August 29th, 2011 AT 3:00 PM

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