10 replies to this topic

[Mini Oll]

Hello,

I recently bought a 1998 Cooper with the MPi 1.3 engine. I bought it with a twin dtm exhaust but still with the original cat. It also had a slight hole in the flexi section of the front pipe. The petrol consumption wasn't too bad but I thought I needed a new front pipe and decided to change the twin dtm for a standard exhaust back box. After getting this work done I noticed that I was using a lot of fuel, when I would have thought it would improve. The car however seemed to drive fine.

I seeked advice and was told to hook it up to a computer to see what was wrong. It came back saying that the Ambient air temperature was reading -214 degrees C. I have been told that this will sort the problem if I replace the sensor. Where is the sensor? Does it sound like this will sort the problem?

There is also a whistle (kind of an electric whistle/hum), not particularly loud but noticable, coming from the boot around the petrol tank. I own 2 minis, this and a modified 1989 Mayfair. The Mayfair does not have this whining sound. Is it normal or could this have something to do with the petrol consumption?

Any help is much appreciated.

[minimanclive]

If the ECU thinks the engine is cold it'll richen up the mixture, the same as pulling the choke out on a carb Mini. The noise from the back is the electric fuel pump in the petrol tank. An '89 Mayfair would have a mechanical fuel pump instead.

[Mini Oll]

Cheers. That is what I have been told but is reassuring to know. Do you know where the sensor is located? Is it easy access?

[Dan]

Should be in the bottom face of the air filter housing.

[AlexM]

A tuned exhaust like the RC40 should lower fuel consumption, as will a replacement air filter element, due to the engine not having to work so hard to draw in the air. (i think im right on this)

[Cookie Monster]

check out this topic, think it is detailed in it somewhere

http://www.theminifo...showtopic=20533

[Mini Oll]

Thanks for all the help so far, however.

I changed the green sensor, I believe it is the air intake sensor, then had a re-reading on the computer. It came up with exactly the same reading as before. The error readings and codes are as follows:

05 - Ambient Air Temperature Sensor
13 - Oil Temperature Sensor Circuit
23 - Oil Temperature Sensor Circuit
25 - Ambient Air Temperature Sensor

The Ambient Air Temperature Sensor is reading -214 degrees C.

The car runs fine though feels lumpy on tick over, and the fuel consumption is still pretty poor.

No one I speak to at Rover or some of the guys who I know in to minis know what this Ambient Air Temperature Sensor is or where it is located.

I have looked through the sections on this forum about SPi problems but couldn't find anything about the Ambient Air Temperature Sensor.

Any help would be much appreciated on any of the aboyve errors.

Cheers

[will.i.am]

i'd give "Mini Sprocket" a message he seems to know his stuff

[Mini Oll]

How do I send him a question? Is there a particular place? Cheers

[will.i.am]

at the top of the page theres abit that says members click on this and find his name then click on his name and you can ever send a instant message or email

[Mini Oll]

Cheers mate, done.