5.7 tune up

1996 GMC YUKON
V8 • 4WD • AUTOMATIC
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CHEVY11974
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  • 1 POST
did a tune up on my 96 gmc yukon 5.7 had 120,000 miles on it. put new wires plugs rotor cap and button pcv valve air filter and when cold starts right up after that takes probably 5 to 10 sec to start when running at idle and sitting still in drive it jumps like a miss and vehicle shakes please help because it makes no since thanks
Jan 13, 2011 at 1:19 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
chances are you bumpped a vacuum hose off when you were working on it. Double check for vacuum leaks. Also, make sure when you routed the plug wires that none are arcing. I've seen new wires (poorly made) that were no good out of the box. Also, make sure none of the wires are laying on the exhause manifold where they could melt and short.
Jan 18, 2011 at 6:48 PM
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