Have had this 02 xjr for a while not driven much started running rough now I have replaced both fuel pumps and car is running!
Running but its still rough I have new Bosch o2 sensors and a set of coil packs I haven't installed yet..
OMG checked the codes there are 16 codes!!! Before only the missfire and o2 sensor code came up...
Here is a list P0174 P0300 THRU P0304 P1316 P0133 P0153 P0335 P1230 P1606 P1642 P1646 P1647 P1671 P1111
I don't know where to start to try and correct these, I guess o2 sensors and used delphi coil packs?
The coils came off an engine that was running when it thru a rod and I've parted out engine.
anyway I welcom any advice on where to start on this..
thanks

 

I would use factory O2 sensors. Clear all codes and then drive to see what comes back.
Have the plugs been changed? Again I would use factory coils and not aftermarket. Why would you install used coils?
Always new for plugs and coils.
.
.
.

 

I have attached the AJ27 fault code list from Jaguar - it covers the 02 units.

Not knowing where to start? Start here and read up on the fault codes.

Tips: Fit a FULLY charged battery, as these cars are sensitive to voltage drops that play merry hell with the CanBus information system, a charged battery gives you a chance at clearing a few spurious codes.

Hard reset - this puts the car back to factory settings, while the battery is off the car and being charged the memory capacitors voltage falls along with any scrambled memory settings. There are other ways of doing the reset, just read up on the forum.

with the car battery in good shape, and memory cleared, then take the fault codes, and see what comes back, consult the list I've attached for a full breakdown for each and how it can be tested.

I will mention the sequential coil pack codes are potential bad news....if the crank and cam sensors are not aligned you get a misfiring bank of cylinders, what makes these engines mistime? a timing chain skipping. As they are 'interference' engines where the valves can meet the pistons and wreck the entire engine.....Just to be safe, check the cams on that bank reporting the misfires - remove the coil pack cover, then coils, then cam cover. You will need to turn the engine clockwise on the crank pulley bolt to check the cam "flats" with a straight edge, if they don't line up then it's timing chains and tensioners that need replacing, there is lots of info on this job here on the forum.

 

Many of the codes seem to indicate a faulty fuel pump install. There may have been a wiring harness
damaged, not hooked up properly, or functioning erratically. Also, I would check the fuses. After making
certain you have a fully charged battery, and a hard reset, then take the readings and see if the same
fuel pump codes are present. If so, something went wrong with the fuel pump install and you will need
to revisit your connections.

 

When I installed the fuel pumps I checked them by removing the fuses and jumping the 12v to the battery. I had the fuel filter disconnected so visually made sure each unit was working...
Some of the codes may be a battery problem I will install a new battery..
as for using "old" coils well factory ones are out of my price range. New aftermarket ones all seem to be made in China and its a crapshoot if and how long they will work, taking ones out of my known stock xjr that had engine failure seemed to be a good alternative as it didn't have any missfire codes.
I'm not sure of the oem o2 sensors but the bosch seems to be one of the better ones.

 

ecm is dying or it jumped time. go check out that p1606

 

P1606 is a ECM Control Relay Output Circuit error. Yes...that could indeed be
the source of many of your issues however it is strange that the codes did not
appear until AFTER the fuel pump install.