Need HELP cant figure this out -
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Unread 06-04-2003, 09:05 PM   #1
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Join Date: Jun 2003
Location: Banning, CA
Posts: 8
Need HELP cant figure this out

I have a 97 GC limited 5.2 v8 with 80,580

At any speed the GC would start studdering like it wanted to die. I hit the gas and nothing then kick hard a couple sec later, this only happened like 3 times . I changed the spark plugs & wires last week . It ran great untel lastnight same thing started happening again, but with major loss of power then it would stall .
And The check engine light came on with codes 12 & 21.

Any suggestions??

Last edited by sup2nrmkiii; 06-09-2003 at 07:45 PM..
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Unread 06-05-2003, 01:23 AM   #2
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2011 WK 
Join Date: Apr 2002
Location: Orem, Utah
Posts: 402
Sounds like it could be the Oxygen Sensor. Check out the codes here
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