1993 Chevy Lumina 1993 chevy lumina z34

1993 CHEVROLET LUMINA
16,584 MILES • 6 CYL • FWD • AUTOMATIC
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JENNIFERPULFREY
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  • 3 POSTS
I have 1993 Chevrolet Lumina z34 one Day i got off from work and my started to shake and suck up gas like water and full tank can last 4 days and the rpm gos crazy .I have check for vacuum leaks and change the fuel pressure regulator and sensors.what can i try next.
Apr 17, 2009 at 9:18 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
When was the last major tune-up?

Scan the computer for code/s if any pops up comeback with it we start here.
Apr 17, 2009 at 9:28 PM
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JENNIFERPULFREY
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  • 3 POSTS
there are no codes coming up.
Apr 18, 2009 at 7:10 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

A Random Misfire code usually indicates a vacuum leak or bad gas.
Apr 18, 2009 at 10:04 AM
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