Recommendation for removing the inlet manifold on an XJR6

[AndyStodart]

I had to do this job today in order to replace a throttle body that keeps jamming shut, overcoming the clutch in the traction control actuator, resulting in complete loss of throttle movement.

I was working on the engine last year and at the time I took the decision to re-route almost all the parts of the engine harness that pass between intake runners 3 and 4. The only exceptions were the intake air temperature sensor and the oil pressure sensor. I was also careful to position certain hose clips so that the screw of the worm drive was at just the right angle. All of these preparations made today's job so much easier. If anyone ever has cause to take the inlet manifold off I would strongly recommend re-routing the wiring for the knock sensors, throttle potentiometer and idle speed control valve, so they don't go through the inlet manifold. You will be glad you did it if you ever have to take the manifold off again.

If you unpick the harness to do this modification, you will find that the knock sensor leads seem excessively long. Do not be tempted to shorten them, as the length is critical to the correct functioning of the knock control system.