hk_cat · Sep 16, 2022

Hi, hoping someone out there can help.

I have a 2001 P38 2.5d "wessie".
Was under the bonnet today and noticed that the braided hose coming from the air inlet intake manifold was not connected to anything. Trouble is I can't see where the braided pipe should be connected to.

Any guidance would be appreciated.

Flossie · Sep 16, 2022

To the map sensor on the fuel filter.

Flossie · Sep 16, 2022

And you'll need a new one that's way too short. 3.2mm id leak off pipe will do the job. Gates stuff is best, same stuff used on the injector leak off pipes.

Tenebreaux · Sep 16, 2022

And then notice the MASSIVE difference in power.

hk_cat · Sep 16, 2022

....Thanks for the swift replies - much appreciated. Will have a look at it in the morning.

Datatek · Sep 17, 2022

Tenebreaux said:
And then notice the MASSIVE difference in power.

That depends on the age of the car, on late ones it make no detectable difference as long as the sensor is electrically OK.
OP, check the manifold spigot is not blocked.

dubbleRR · Sep 17, 2022

Ether the pipe has snapped or it been attached to a T piece going to a power box ...possible

..

Flossie · Sep 17, 2022

Datatek said:
That depends on the age of the car, on late ones it make no detectable difference as long as the sensor is electrically OK.
OP, check the manifold spigot is not blocked.

I agree with the power issue. My mates 2001 pipe was rotted to dust when he got it, replacement made zero difference.

Tenebreaux · Sep 17, 2022

Mine's a 2000 and refitting the pipe made me think I had a different engine in it.

Datatek · Sep 17, 2022

Tenebreaux said:
Mine's a 2000 and refitting the pipe made me think I had a different engine in it.

Probably depends on the EDC firmware level, makes no difference on on either of mine.

Grrrrrr · Sep 18, 2022

Tenebreaux said:
Mine's a 2000 and refitting the pipe made me think I had a different engine in it.

Later cars had MAF fitted so it knows how much air there is from that. Early cars had to work it out from pressure and temperature. Later cars don't use the inlet air temperature either, hence the weird negative value from the Nanocom. You'll notice it if the MAF starts acting up though.

Datatek · Sep 18, 2022

Grrrrrr said:
Later cars had MAF fitted so it knows how much air there is from that. Early cars had to work it out from pressure and temperature. Later cars don't use the inlet air temperature either, hence the weird negative value from the Nanocom. You'll notice it if the MAF starts acting up though.

IAT is in the MAF

Grrrrrr · Sep 19, 2022

Datatek said:
IAT is in the MAF

Is that not the one that shows as something like minus 40 centigrade on the Nanocom?

Datatek · Sep 19, 2022

Grrrrrr said:
Is that not the one that shows as something like minus 40 centigrade on the Nanocom?

That's the default value for the missing manifold IAT that is replaced by the sensor in the MAF.

hk_cat

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Flossie

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Tenebreaux

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hk_cat

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Grrrrrr

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Grrrrrr

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