sierrafery said:

I must answer to that cos even if i promissed with this statement of your's i completely agree and that's not something to be missed ... your problem is that you refuse or simply can not comprehend that since the EGR was introduced together with the MAF to control it the whole engine management was addapted to the new situation cos the EGR doesnt have a different ECU, it's managed by the same unit, the EGR management on the Td5 is not based exclusively on MAF cos it's part of the addaptive strategy and other sensor inputs are involved too in the EGR control exactly like the MAF is used in the overall fuelling strategy.
View attachment 135980
So the ECU(ECM) is used for EGR in accordance with the prevailing operating conditions, one influencing factor for this is the MAF as well described in the document so it's implication in that whole thing which was higlighted including fuel delivered are all in the same algorythm and that's how the management works cos the ECU calculates the fuel delivered as being that IQ which i explained in that "crap".

So please try to aknowledge that nobody contradicted your obsessive statement that the diesel engine is throttled by fuel not by air but there is a the difference between how the fuel is delivered by a complex electronic management or a classic system, on a classic engine when you push the cable driven throttle more fuel is delivered while with the electronic throttle this will happen only with the ECU's involvment what's so hard to understand...and yes the diesel lump will behave exactly as you say but it must get fuel for that and in this case the fuel is delivered based on that "crap"


and for GOD's sake dont say again how the diesel engine works cos now we speak about electronic management and EGR which you brought into the discussion.

Click to expand...

wammers said:

Fuel injected on a diesel engine is NOT subject to or in ratio to airflow through the MAF sensor. It is a result of throttle/power demand. There is ALWAYS more air than required for combustion. What part of that simple statement do you not understand?

Click to expand...

sierrafery said:

the bolded part cos Kg/Hr is air mass not flow

so why the ECU cuts fuelling when the MAF reading exceeds 680kg/hr if it's neglected in the fuelling strategy?

as a conclusion for the OP: to have an engine as to function in optimal conditions you need a well working MAF connected to the ECU regardless if the EGR was blanked or not ... that's a fact

Click to expand...

wammers said:

. You really do need to start looking through the correct end of the telescope.

Click to expand...