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Buick won't upshift.

Tiny
RGBECKER
  • MEMBER
  • 1990 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 90,000 MILES
1998 Buick Century
Transmission: Does not up shift, until/unless you release trottle momentarily. All gears good etc. Just won't shift up automatically.I suspect low vacume. Will be checking for leaks. Vacume guage rests at about 15 lbs at idle. Shouldn't that be higher? Thanks for your help.
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Tuesday, July 12th, 2011 AT 1:01 AM

4 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
You're probably going to find out that problem is a lot more serious than low vacuum. You likely have a serious transmission issue. I suggest you get it looked at.
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Tuesday, July 12th, 2011 AT 1:09 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Should be about 17-21 inches-Upshifts problem have the TPS and VSS checked and tested
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Tuesday, July 12th, 2011 AT 1:11 AM
Tiny
RGBECKER
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TPS? VSS? Sorry, need a translation. Roger.
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Tuesday, July 12th, 2011 AT 1:28 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Throttle position and vehicle speed sensors-
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Tuesday, July 12th, 2011 AT 1:32 AM

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