Jts slight misfire
I know theres alot of posts on this subject and i believe i've read most of them with out a complete answer to my problem, my 2003 156 jts has slight misfire when idling. I had this problem before which was lambda sensor so i replaced and cleared the fault code all was good.
This time theres no fault codes, tried disconnecting coil packs in turn to see if it was one of them. Checked and cleaned every connection with electrical cleaner, thing is its just had new spark plugs (correct ones) and seems to be a little worse. Its fine most the way through rev range and pulls hard, just at low revs and idling.
Could my other pre cat lambda be on its way out, just not servere enough to throw up fault code? really dont know.Iits a lovely car and i've wanted one for ages so wish to sort this out.
Any suggestions much appreciated. Jed