I'm posting my thread in the S-Type forum as well as we share the same engine:

I have a Jaguar X350 2.7 TDVi - 06 which my Jaguar specialist garage cannot fix!

It started with a turbo failure (turbine wheel axle collapsed) - something I was expecting after 250.000 km with original turbos and regular oil changes every 10.000 km. Both turbos were replaced with remanufactured units, and the intake and intercooler were cleaned from oil.

Since then, the car runs just fine, except when you floor it: after 8-10 seconds it will put itself into restricted performance mode, and P0100 + P0103 are logged.

I have access to my own IDS and when logging live data I can see that Mass Air Flow Sensor A is showing 30-40% higher values than Mass Air Flow Sensor B when putting the engine under load.

If I switch over the MAFS, MAF A will still show 30-40% higher values than MAF B.

The following has been done by my Jaguar garage to solve the problem, but with no success:

- Replaced both MAFS
- Replaced wiring between MAFS and ECU
- Replaced EGRs
- Replaced ECU
- Smoke check for leaks in the tubing

We have run out of theories now. What can be wrong? Assume that the actual airflow is 30-40% higher in MAF A - could it be that one of the turbos is operating at a higher boost pressure unintentionally? There are no fault codes logged for the turbos. Can you measure actual boost pressure with IDS?

Any help is highly appreciated - so far I have spent +£2500 on this problem, with no resolution in sight...

 

Were OEM Jaguar MAFs used? Some aftermarket units can be faulty. Other than that, I don't have any ideas other than what you've already done.

 

I am using genuine parts.

 

Please continue the discussion in the other thread ==>> https://www.jaguarforums.com/forum/x...-p0103-117987/


Thanks.