Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Do you hear a ticking noise from under the hood? Is there holes rusted through the rear wheel wells underneath? If you plug off the exhaust with an old t-shirt while the engine is running can you hear the source of the leak?
Any luck finding your exhaust leak my restricting the flow from the tailpipe?
Hi, My Name is ***** ***** for posting your question to just answer. I am a independent contractor for just answer, and ASE Certified Master Auto Technician with 20 years experience. I am confident we can resolve your problem together.Please remember I don't know your skill level. I can't see, smell, hear, or touch the vehicle. It may take a few back and forth replies to get to a satisfactory resolution.There will probably be some equipment needed for a proper diagnosis. If you are not comfortable with this or do not have any test equipment please let me know ASAP. I also try to give all of the information you may need expecting a positive rating. I am not compensated for my time until you leave a positive rating. Your rating should be based on the service you received.
MY immediate suspicion is that either your EGR valve is leaking or you have a cracked exhaust manifold. Call and ask a local shop if they have a smoke machine and have the system smoked for leaks. Will be easy to find if as bad as you say.