Jaguar Repair Problems? Ask a Jaguar Repairs Expert.
We may have injector problems. Make sure we do not have any other air leaks like a cracked or damaged air intake tube. Then disconnect the negative battery terminal cable for about thirty minutes. Reconnect it and see if the long term fuel trims reset back to zero. If so then see what the short term trims are reading at idle after start up. Also make sure we donot have a crank case leak as a leaking PCV or oil filler neck can cause this. Let me know.
All Good ?? Did a injector power balance test as well, seems fine ??
What do are fuel trims read after disconnecting the battery?
No Change ??
Do they reset to 0 after the battery is disconnected and the ignition is turned on?
No, This is Messed up.
STFT running 9-12 Cold, -1.0 to + .5 Hot, LTFT 19-20 Cold, 17-18 Hot, Injector Duration 2.0 MS Manifold absolute PSI 5...