Hello, I swapped my bad 2002 engine block with a 1999 xjr block. After putting it all together car would only start and run for a second or two. I then replace fuel filter and the car ran
for several min. I replaced the rear wheel and put the car on the ground, it wouldn't stay running again. I pulled the fuel line off the filter, didn't get good flow so replaced both pumps.
I still have the same problem. I rented a fuel pressure gauge and I'm getting 40+ psi at the fuel rail.
I can start the car and if I feather the throttle I can keep it running somewhat. I pulled the throttle body off and everything there looks good.
Oh I have another running 2002 xjr that I have been swapping parts and haven't found the problem.
any ideas????
t

 

A 99’ should still be a AJ26 engine. You have a AJ27 car with an AJ26 engine now. The sure way to tell is if the right bank (or bank 1) camshaft sensor on the rear topside of the cylinder head is present or not.
Photo above. AJ26 engine without camshaft sensor on right bank (or bank 1)

AJ27 engine with camshaft position sensor.

If you dont don’t have a cam sensor on bank 1, you’ll have to swap that head and camshaft onto the good engine.

 

yeah sensor is there, did more test on maf not getting 12v or ground on any of the pins need a wiring diagram.




















of the 1999 xjr (heads are different) .... I did use the cam positioning tool can't find any cam sensor on either the 2002 or 1999 bank 1 heads
I think only the xj8 has these.

 

I replied to your OTHER THREAD. Please keep to only ONE thread at a time for the same fault.

bob

 

sorry about opening new thread for same fault, anyway just getting frustrated with this been working on the car for over a month now on and off.
thanks

 

The MAF gets 12V supply via its pin marked "54 E". However, when this supply comes in is controlled by the ECU so you may not see any 12V on the pin when just switching the ignition "on". All other MAF pins are connected to various pins of the ECU so, again, you will not be able to establish which one goes to the ground as the connection to the ground (if any) is controlled by the ECU. The ECU probably switches the 12V to the MAF only once you start cranking the engine.