Fault codes after changing spark plugs 😞
#16
#17
I changed the plugs for my 4 yr/40k mile service and and NO issues removing the coils from the plugs - could there have been another issues as to why yours were so difficult to remove? I had the cats off anyway (I replaced them with 200 cell units) so that made the job easier, I bet. I simply unscrewed the bolt that held them to valve cover, unplugged them, and rotated slightly clockwise & counter clockwise while pulling outward to release them.
Forgot to say - obviously I removed the O2 sensors but tried to be very careful with wires. THOSE were tough to loosen but eventually came free. My engine was also a 3.4 (2015)
Last thing - I may have a spare set of O2 sensors (all four) with <1k on them. If you need some PM me & we can work through details.
Forgot to say - obviously I removed the O2 sensors but tried to be very careful with wires. THOSE were tough to loosen but eventually came free. My engine was also a 3.4 (2015)
Last thing - I may have a spare set of O2 sensors (all four) with <1k on them. If you need some PM me & we can work through details.
#18
I changed the plugs for my 4 yr/40k mile service and and NO issues removing the coils from the plugs - could there have been another issues as to why yours were so difficult to remove? I had the cats off anyway (I replaced them with 200 cell units) so that made the job easier, I bet. I simply unscrewed the bolt that held them to valve cover, unplugged them, and rotated slightly clockwise & counter clockwise while pulling outward to release them.
Forgot to say - obviously I removed the O2 sensors but tried to be very careful with wires. THOSE were tough to loosen but eventually came free. My engine was also a 3.4 (2015)
Last thing - I may have a spare set of O2 sensors (all four) with <1k on them. If you need some PM me & we can work through details.
Forgot to say - obviously I removed the O2 sensors but tried to be very careful with wires. THOSE were tough to loosen but eventually came free. My engine was also a 3.4 (2015)
Last thing - I may have a spare set of O2 sensors (all four) with <1k on them. If you need some PM me & we can work through details.
My coils came out easily but the rubber piece which is attached to the tip of the coil got stuck inside the tunnel. Couple of other members had the same issue.
If I need O2 sensors I will PM you.
Regards
#21
#22
#23
For those who have changed plugs on a 991.1, is it necessary to remove the O2 sensor if you have proper extensions and a universal joint adapter?
Thx
Thx
Spark Plug Replacement
Last edited by Sidvicious7; 05-22-2019 at 08:21 PM.
#24
So now you have identified that it is a misfire. In my world that is usually a new engine but in yours - a different story. As I have stated before, change the coils when you change plugs. These devices will last 100k, except when you have to remove them earlier for a spark plug change - the rubber just does not hold up. For $230 change them out when you change plugs. I change out my coils every 2 years for just this reason. Who needs the grief or having thousands of dollars at risk for a track weekend missed. Just preventative Mx!
#27
https://www.boschsparkplugs.net/lear...g-instructions
#28
÷1 on " gapping" these plugs. I also had no difficulty removing, installing and torquing using readily available extensions and one universal and removing rear wheels . Don't make this harder than it needs to be.
#30
I hadn’t heard of gapping these plugs either but I thought I read on here where someone installed plugs with the wrong gap and it noticeably ran bad. I’m changing mine this weekend and will cross check all plugs along with the originals taking into account any wear.