Gas gauge jumps up halfway and falls back down again

1998 CHEVROLET MONTE CARLO
151,000 MILES • 3.8L • V6 • FWD • AUTOMATIC
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AARON LISTER
  • MEMBER
  • 5 POSTS
So I bought this car after it sat about six years. Everything works, but the gas gauge does not. Weird thing about it is that when I turn the key, it jumps up about halfway and falls back down. Any ideas?
Oct 25, 2016 at 1:08 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
scan for codes first then a mechanic will have to test the rest of system. he needs to put a special tool on PCM harness to test it.
Oct 25, 2016 at 2:35 AM
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AARON LISTER
  • MEMBER
  • 5 POSTS
Only code is fuel pressure sensor
Oct 25, 2016 at 9:00 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
then you'll have to take to a mechanic so h e can test it by varying resistance to fuel gauge.
Oct 25, 2016 at 9:36 AM
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