Maf not needed on 10p engine

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300bhp/ton said:
I don’t know the specifics on the 10p engine. But in general a MAF is a Mass Air Flow meter. Ie it measure the flow and mass of the air and is then used to adjust the fuelling accordingly.

Unplugging it will then normally result in a default fuel map. Which should be save to run. But won’t be able to cater for different situations.
Click to expand...

Not on a diesel it isn't.
 
Don’t know whether maf has anything to do with fueling strategy but I know from monitoring Hawkeye that my faulty maf affected injector balance whereas the new working maf had balance within 3-4 of each other.
 
From the manual
The MAP/IAT sensors are combined in one unit located in the inlet manifold. It provides pressure and temperature
information about the air in the inlet manifold to the ECM. The ECM compares the voltage signal to stored values
and compensates fuel delivery as necessary. The ECM uses the signal from the MAP/IAT sensor for the following
functions:
The MAF sensor is located in the intake system between the airfilterhousing and the turbocharger. The ECM
uses the information generated by the MAF sensor to control exhaust gas recirculation (EGR).,
you need to know what airs going in to know how much exhaust gas can be let in to inlet
 
Kadonkadonk1 said:
God knows, this is all what I'm trying to figure out a simple there's got to be a reason why it's there in the first place
Click to expand...

To measure airflow when EGR is active. The reduction in flow through the MAF when the EGR valve is opened tells the ECU how much exhaust gas is being ingested. The ECU then modulates the EGR valve to increase or decrease this amount to maintain a combustible air ratio just above that which is needed for clean burn. Simple if you understand how the EGR works, but not if you think the MAF on the diesel works the same way it does on a petrol engine. It simply doesn't, it has nothing at all to do with fuelling.
 
bankz5152 said:
If that is the case then why do they run differently depending on if the MAF is plugged in or not?
Click to expand...

I am not getting into this stupid diatribe again. The MAF sensor air flow on a diesel does NOT control fuelling. Simple as that. Fuelling on a diesel is subject to throttle /power demand. The more fuel is injected the faster it runs the less fuel the slower it runs. The airflow through a MAF has nothing to do with it. There is always more air in the cylinders than is required for combustion. None receipt of expected signals can confuse the ECU.
 
does it make any difference how the maf works according if its a new or old diesel plse
 
wammers said:
I am not getting into this stupid diatribe again. The MAF sensor air flow on a diesel does NOT control fuelling. Simple as that. Fuelling on a diesel is subject to throttle /power demand. The more fuel is injected the faster it runs the less fuel the slower it runs. The airflow through a MAF has nothing to do with it. There is always more air in the cylinders than is required for combustion. None receipt of expected signals can confuse the ECU.
Click to expand...

Fair enough, though you didnt answer my question. You cannot deny that TD5s do run differently whether or not the MAF is plugged in, EGR blanked or not.
 
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