How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask George H. Your Own Question
George H.
George H., ASE Certified Technician
Category: Cadillac
Satisfied Customers: 18561
Experience:  ASE Master Tech 15+ Years
Type Your Cadillac Question Here...
George H. is online now
A new question is answered every 9 seconds

Cadillac Deville DTS: 2000 Cadillac Deville 140,000 mi. Irregular

Customer Question

2000 Cadillac Deville 140,000 mi. Irregular missing at idle. Changed plugs, boots, and coil packs.
Submitted: 11 months ago.
Category: Cadillac
Expert:  Dan replied 11 months ago.
Hello, my name is***** the check engine light on? Thanks
Customer: replied 11 months ago.
Customer: replied 11 months ago.
Any ideas?
Customer: replied 11 months ago.
Can I expect any more help from you to my question?
Expert:  Dan replied 11 months ago.
Have you cleaned out the throttle body? Does it run fine at highway speeds? Thanks.
Customer: replied 11 months ago.
Yes, Throttle Body was cleaned. Runs fine at highway speeds. Also, I ran a test at Oreilly (see attached).
Expert:  George H. replied 11 months ago.
Hello, different expert here, Can you have them show that first screen at idle and you spray some carb cleaner at the bottom of the bellows between the throttle body and the intake manifold? If it changes the O2 readings drastically the rubber boot is leaking and needs to be replaced. Let me know if you can do this Thank you