Hey guys, I have a 2003 TL Type-S that misfiring at random cylinders, usually at initial start up, the check engine light, vsa light, and the traction control light goes off. Also when I let it idle for to long these lights will also come on? any help? Replaced ignition coils but that didn't help.

 

Welcome to AZine. What's the CEL codes? I don't think the VSA should come on with a misfire, might be something more.

 

Hey its P1399 I believe misfire at all cylinders

 

and Thanks!

 

Hmm, if that's the only code then definitely tackle the misfire first. What are the condition of the spark plugs? Are they NGK?

Fuel injectors on these cars usually don't have problem, but that could also be a culprit.

 

I think they are denso. And when I idle those 3 lights come on. (sometimes for a long time, sometimes when I idle tor a short time)

 

No P301-306?

 

Probably needs a valve adjustment

 

Usually you'd get the P301-306 if that was the case.

 

NGK > Denso.