Buick won't upshift.

1990 HONDA CIVIC
90,000 MILES • 4 CYL • FWD • AUTOMATIC
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RGBECKER
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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 12, 2011 at 1:01 AM
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WRENCHTECH
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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 12, 2011 at 1:09 AM
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RASMATAZ
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Should be about 17-21 inches-Upshifts problem have the TPS and VSS checked and tested
Jul 12, 2011 at 1:11 AM
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RGBECKER
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TPS? VSS? Sorry, need a translation. Roger.
Jul 12, 2011 at 1:28 AM
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RASMATAZ
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Throttle position and vehicle speed sensors-
Jul 12, 2011 at 1:32 AM
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