Does the HPi have a MAF Sensor?

[DaiRees]

Right, everyone's on about MAF sensors, in fact they seem to be a common theme throughout about 90% of our recent threads. Now I reckon this hesitation and lack of pull at low revs is a symptom that's familiar to me too, so was wondering if mine has a MAF sensor, and if it has where is the bloody thing so that I can give it a clean?

I'll get a photo of my engine bay up later and you knowledgeable types can lend me the benefit of your expertise by adding some pointy things....

[DaiRees]

Here we go....

[steve_earwig]

Christ knows, can you find it on Service Box and work backwards?

[DaiRees]

Who knows what they'll call it though. last week I bought a little bit of plastic interior trim from the stealer, pugs description was "plug towball"

[puggy]

if you go on service box and look in air filter for your car all the piping should
come up and it should be part of that

[DaiRees]

[puggy]

ok will stick my neck out on mine (yes i know its a hdi ) its on the pipe
going FROM airfilter box so i would guess around here

[DaiRees]

That's the Throttle Control.

Just been reading a Shitroen forum, (C5 has the same engine) and found this...

Looks suspiciously like something to do with the Air Flow Sensor (or is it an MAP sensor?).

These engines have a MAP sensor,its located in the pipe at the brake servo though.

So now what the hell is a MAP sensor? is that something to do with geography?

[puggy]

well thats totally fooked my idea up

[steve_earwig]

Manifold Absolute Pressure?

(Mangled Aching Penis??)

[DaiRees]

Item #10, pressure sensor?

[Welly]

Your engine doesn't have an air flow meter - it senses manifold pressure (a MAP sensor) it measures absolute pressure and the ECU converts this into an air volume.

They are small sensors, screwed into the inlet manifold somewhere.

Dai - what's your throttle action like? only that throttle cable route looks a bit restictive to free movement - my HDi cable takes a similar route but isn't held back against th bulkhead like yours. Maybe the throttle cable is 'jerky' resulting in your 'miss-fire' ?

[DaiRees]

The throttle's pretty smooth actually, and the hesitation occurs if you accelerate with the cruise too, so I don't think it's the throttle cable.

So do you reckon this MAP sensor could do with a clean if I can find it, or is it better to leave well alone?

[Welly]

Have you got insurance?

[DaiRees]