» » »

Cadillac Q&A

Ask Your Question

2003 Cadillac DeVille DTS Question: caddy is misfire on 6 running bad need help

 

Question

harleyman50, Somerset, PA, December 19, 2013, 13:49
 Rookie

I have 03 caddy dts with mis fire on number 6 I changed cam sensor and coil pack still saying misfire running ruff

3 Answers
Flag This
  • Answer #1

    csubak30 December 19, 2013, 14:22
    Profile_thumbnail
     Master

    Check sparks plugs. If these are okay, I would suspect a vacuum leak to one of the hoses on the intake. Usual suspect is the pcv hose or the rubber elbow on it. You can spray carb. cleaner on the hoses (while vehicle is running) and listen for the engine idle to change. If it does, you have found your vacuum leak.

    Reply
    Flag This
  • Answer #2

    G. T. Service Center (3053 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG December 19, 2013, 20:00
    Profile_thumbnail
     Master

    Just a thought, today I had an '02 with misfire on #2. Valve cover gasket leaking, 1.5" of oil in spark plug tube.

    Reply
    Flag This
  • Answer #3

    Greg's Orange Auto (12184 Answers) , Orange, CA - (714) 361-9386
    globalhelper December 20, 2013, 06:27
     Master

    poss injector or wiring to injector also

    Reply
    Flag This