Buick won't upshift.

1990 HONDA CIVIC
90,000 MILES • 4 CYL • FWD • AUTOMATIC
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RGBECKER
  • MEMBER
  • 4 POSTS
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.
Jul 11, 2011 at 6:01 PM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 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.
Jul 11, 2011 at 6:09 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Should be about 17-21 inches-Upshifts problem have the TPS and VSS checked and tested
Jul 11, 2011 at 6:11 PM
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RGBECKER
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  • 4 POSTS
TPS? VSS? Sorry, need a translation. Roger.
Jul 11, 2011 at 6:28 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Throttle position and vehicle speed sensors-
Jul 11, 2011 at 6:32 PM
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