What is the use of a MAP sensor in the engine bay (K-Series)

[TopQ1967]

Hi,

 

I have switched my ECU from MBE to DTA.

The MAP sensor was in the original instal attached to the bulkhead with no connection to the inlet manifold. Curently the MAP sensor is not connected.

 

As far as I know the MAP sensor should be inbetween the throtle body and engine.

 

What is your opinion?

 

Regards

 

Q.

 

 

 

 

[oilyhands]

Normally MAP sensors are either local and electrically connected to the ECU in whcih case they need to be the engine side of the throttle body, or remote (in or out of the ECU) and connected via a vacuum hose to a point that is the engine side of the throttle body. The MBE as mounted in a Caterham RXXX normally has a remote MAP sensor that does not have a vacuum tube connected to the induction although it is wired to the ECU. In your case it can be ignored and dewired.

 

Oily

[TopQ1967]

Oily

 

Thank you for your info.

 

Regards,

 

Quirin

 

 

 

[rj]

That sensor is not a map sensor although always referred as.

 

It's a barometric pressure sensor, and is used to correct for changes in air density, just like the air temp sensor near the induction.

 

You can live without it as long as you don't drive in mountains or the like, but I would recommend to keep it.

[Mick Day]

Depends on the ECU I suppose. My GEMS ECU has a switch for either external (to the ECU) MAP sensor or for internal barametric pressure sensor.