I replaced the coil and the spark plug with a Champion sparkplug which cured the misfire. I bought the XJR with a misfire on cilinder 8. The cause of it turned out to be a WRONG SPARK PLUG, believe it or not! I'm not saying it'll work for you, but it may be worth a try. The above was taken from a Jag technician's bulletin and since setting the drive cycles by following the process above in my 2008 XJ, my lurch symptoms greatly improved. This process worked for me so hopefully it might be helpful to others with the lurch, before spending a fortune." I will get the gearbox flushed and serviced next year anyway, as the car has just turned 71k miles and it's probably on its original oil. I did this 7 times to be sure, and the gearbox is transformed. Gently apply the brakes until the car comes to a standstill and hold on the foot brake for at least 15 seconds.
Follow this process through 2-3, 3-4 and 4 -5 at between 1300-1800 rpm and gently accelerate to 50mph in 5th gear. From standstill, gently accelerate from 1st to 2nd making the change up at between 1300 - 1800 rpm.
Run the car to normal working temperature (transmission oil should be min 60 degrees C). The car no longer seems to have the lurch, and all gear changes seem smoother to boot. Anyway, I followed the instructions to the letter and so far the results have been very satisfying. I printed the instructions but I've been unable to find them again since, although I've not had time to have a proper search to be honest.
#VCDS TRANSMISSION ADAPTATION RESET FULL#
On looking into the cost of a full gearbox flush and refill, before spending £600+ I decided to try resetting the drive cycles myself by following a procedure in a Jaguar technical bulletin that I'd come across online. "Since buying the car in March 2018, my XJ TDVi 2.7 with the ZF6HP26 box developed 'the lurch ' (on slowing down at junctions then accelerating away, it would hesitate and jerk into gear). PS: I know there are many topics about this, but I can't find an answer for my question. I have read that the transmission adaptations can't be rest by only disconnecting the battery, but then what's the explanation? I was back (a couple of times actually) to the ZF specialist for an adaptation reset, but he has problems with the diagnostic tool, and can't reset the parameters (from what I understood it's some Jaguar-specific software).Īre there any other known ways of doing this? I noticed that after I disconnect the battery for a couple of hours, and reconnect it back, the shifting improves very much and the lurch is also gone! but this only lasts for a couple of days (or a couple of miles) and after that it's back again. The problem that I now encounter is the well-known "ZF Lurch", and also slow 1 to 2 gear shifts (there's also a weird sound when it shifts from 1 to 2).
One year ago my 2.7D S-Type had a completely transmission rebuild (by a ZF specialist), almost all the parts were replaced with original ZF parts (new clutch disks, new mechatronic/valve body, new seals kit, new oil pan and oil).