I have a blinking CEL. Blinks 10 times but only when the battery is on. Check engine light goes off once engine is on. Is this an issue or?
Do you have a 2005 or 2006 model? If so, it is likely an issue that is described in this TSB:
https://static.nhtsa.gov/odi/tsbs/2013/SB-10064540-0335.pdf
View attachment 338198
I believe that this TSB is a free repair at the dealer, or you can do it yourself using the procedure described in the TSB.
If this occurs prior to starting the engine, it means that the emissions system is not ready for testing. There is a TSB for 2005-2006 TJs. This will also happen after the battery has been disconnected or the check engine light has been reset. If that’s the case it’ll resolve after 3 drive cycles.
Any codes or symptoms besides the blinking light?
Any codes or symptoms besides the blinking light?
Possibly an issue with that?
Could make it run like crap, what plugs?