Jaguar Forums - Jaguar Enthusiasts Forum - 96 VDP P0300/P0302/P1313. What to try next?

My 96 USA VDP had these codes (and no others), and still gets them after I’ve tried a number of things, and cleared codes:

• P0300 – Random misfire detected.
• P0302 – Misfire detected – cylinder 2.
• P1313 – Catalyst damage misfire detected – cyl 1, 2, 3 (Bank A)

I understand that possible causes for all these are:

• Fuel contaminated.
• Fuel injector blocked or leaking.
• Ignition secondary circuit breakdown (coils, spark plugs).
• Fuel pressure low.
• Cylinder compression low.
• Broken valve spring(s).

Here’s what I’ve done so far, without improvement:

• Inspected old spark plugs. Nothing unusual.
• Installed new spark plugs.
• Got a new coil and cycled it through all six positions.
• Removed fuel injectors and had them rebuilt by Mr. Injector.
• Compression check (I didn’t record the values, but nothing seemed way off, nor were any two adjacent cylinders low).
• Bought a fuel filter (but couldn’t get the old one out, even with the special tools. Could have a pro install it. But doesn’t seem like it would affect one bank only.)

Symptoms (besides the recurring codes):

• Rough idle (consistent with missing).
• Some slight surging and hesitating at freeway speed.
• Some slight lack of smoothness when accelerating from idle.

Any ideas?
What should I try next?

Thanks,
George