Jaguar XK8 Throttle Body R&R

I recently experienced a P1121 code “Pedal Position Sensor” I was not pleased.  But I have a little history that I think lead me down the wrong path.  It all started when I started the car and the engine started but would not accelerate and was idling poorly so I turned it off and restarted and checked the codes.  No codes and all was good on the second start.  I did notice that the cruise control was still on from the day before.  A few weeks later driving on the highway 55/65mph the car shutdown, I got a failsafe, traction stability control and transmission failure.  Again no codes and the cruise control was in use.  Turned the car off and restarted and I was on the road again but this time I turned the cruise control off.  Got home and elected to order a new brake switch, it was changed and all was good until about a month later when I started the car and it began shaking poor idle and a restart did not clear it and to my surprise a code P1121.

Started my troubleshooting and talked to a friend Steve who confirmed my conviction that I needed to repair/replace the throttle body, the question now is do I repair, replace and with what company.  I elected to go with ASI, they rebuilt my existing throttle body and the entire process of removal, shipping, repair, return and reinstall was all done in less than a week.  After I installed the throttle body and the car would not start, so I fooled around with the power to the fuel pump and got it started.  I think I had a poor connection with the relay.

The possibility of having my throttle body rebuild was appealing to me.  I should also mention that the price was right and the warranty was great

The Torque in the bolts  AJ26 torque is 18-24 Nm, and the AJ27  is listed as 21 Nm.



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