My car is XJ8 3.2 98
Can anyone advise what is wrong? Tank is half full of gasoline, but still sometimes just like in the tank would a strange noise ( krrooooh ) when I press a little more gas and simultaneously the car a little choppy.
But if I push a lot of gas, there is no sound hear.
I change tank pump and filter and under the vehicle for the filter. But still strange noise hear the tank direction.
I took the gas cap off, and I feel that the sound is no longer so often, if at all. Could be a vacuum in the tank and when the cap is not closed so it would not get it through the air better?
Or what is wrong with my car? Please could anyone help this problem?

 

If I check the fault codes, then it will give the code P1643

 

P1643 CAN TCM token missing Ignition ON > 5 seconds When fault is detected, ECM: CAN open circuit fault – TCM to ECM
– Limits throttle to 30% CAN short circuit fault
(Torque reduction request data missing results in harsh transmission shifts)

Best I can find. Fault listed in DTC list
Possible causes are






CAN open circuit fault – TCM to ECM
CAN short circuit fault


TCM failure


ECM failure

 

Oops- what happened there? Script is small and box is huge . Totally unintended.

 

What do you think of that gas tank problem when from there hear any abnormal sounds when I driving a little gas?
I have Memoscan U581 scanner and it will not allow me to remove to that fault code, that is, the problem is probably on the way all the time. Sometimes, very rarely in the instrument cluster will notice that the gearbox problem, but it's really rare. Bring the fuel tank sides of the strange noise interferes with, however, more. It does not fall when I put the car cool to visit and the time for a few kilometers, but then it starts when the car is already at normal temperature. The sound comes only when I push just a little more gas.