2005 Chevy Suburban 2005 Chevy suburban 8.1 L

2005 CHEVROLET SUBURBAN
110,672 MILES • V8 • 4WD • AUTOMATIC
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JUSTJIM
  • MEMBER
  • 1 POST
The sub. came back from a chevy dealer now closed up.they installed a new throttle assamble.On the way home it started to run very poorly would not rev up .Engin pings has no power &shiff erratica.It idles &rev up in park but it run like it out of time.pulled the codes-po068-po101-po102&po455.I R&R the MAF sensor.The timing go from19 to 50 degrees back & forth?
Sep 16, 2009 at 9:05 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Has the check engine light come on? I question the knock sensor. It can cause the timing to change and the pinging.
Sep 16, 2009 at 9:17 PM
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