Sender with no connection / bunged hose

[ianwayne]

On my 2000 year Chimaera 4.0, I've noticed what looks like a sensor or sender on the inlet manifold with no connection on it. Can't find a lead flapping anywhere either. It's on the near side inlet manifold just to the right of the brown connector:



Additionally, the narrow hose connected to the manifold just below it is bunged at its other end and not connected to anything.



Are these redundant? Or has some modifying been going on that I'm unaware of?

[fatboychim]

The hose is the patent TVR no airlock system. I'm not sure it was by design but I unthread the pipe and use it as such when refilling the coolant system.
I'm almost certain I have the same redundant sensor on mine, if no one else comes along I will check when I get home.

[Richard 858]

Not sure about the manifold sensor but my '98 450 has the same short rubber hose & bung and as far as I know mine has had no engine mods (yet !)I'll have a look at my motor again this afternoon to see if I can find the sensor.

[Ant.]

The spare sender is an additional coolant temp sender that is never used, TVR used the horizontally mounted one at the front of the manifold.

The bunged up hose used to go to the plenum heater on the original application of the hotwire injection system, again TVR disconnected it to ensure the intake air is not heated any further.

The plenum heater mod is quite common..

[Bassfiend229hp]

The "spare" sender is used when the RV8 is installed in a Range Rover as the temperature sender for the dash temperature gauge ... When TVR used the RV8 they decided that this was far too simple a solution and so mounted their own temperature sender in the coolant equivalent of a "cul de sac" where it (normally) underreads when the car is in motion (due to excessive cooling due to airflow) and overreads in heavy traffic (due to heat soak).

There have been a number of threads on here about using that RR sender instead of the TVR one to get a more accurate indication of engine temperatures as it's right next to the ECU temperature sender.

Phil

[ianwayne]

On the ball out there! Thanks a lot.

I got distracted by Scott Waites getting thumped in the darts but at least I've nothing missing or not connected. I do need a new Coil to Dizzy HT lead though, knackered it getting it off. Cleaned up the cap connections and rotor arm too.