Misfire codes on cylinder one and six

2005 CADILLAC SRX
119,000 MILES • 3.6L • V6 • RWD • AUTOMATIC
Avatar
V LUCIO
  • MEMBER
  • 1 POST
When it is at idle it shake, but when driving it drives fine. the misfiring codes that pop up are cylinder one and cylinder six and a random misfire. I changed all the plugs replaced the coil on cylinder six and it still pops up as cylinder six and cylinder one. So i swapped the cylinder six injector with cylinder two to see if the code would jump to cylinder two and it is still at cylinder six. What else could it be?
Oct 20, 2016 at 6:24 PM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Hello V,

This could be an intake valve leak, can you remove all of the plugs and do a compression test, we are looking for one low cylinder that would leak combustion into the intake manifold which would affect 1 and 6.

Here is a guide.

https://www.2carpros.com/articles/how-to-test-engine-compression


Please let us know what you find so it will help others.

Best, Ken


Oct 24, 2016 at 7:23 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.