Thread: Chinese MAF

A few months ago, I had a problem with my indicators and thought it might be the hazard warning switch. I needed another good one to check. My local parts mob said $80.00 for genuine Lucas, and $30.00 for aftermarket. I got one from China for $6.00 delivered and it's branded Lucas and seems to be identical to the original one. Turns out that wasn't the problem, so I was glad I hadn't paid $80.00 to find out.
You just never know.
Don

Hopefully your run with it will be as good as brother is getting from his.
Was the first issue he had after he got the TD5, and with some help from this forum, sounded like the MAF was the issue.
He immediately went for option .... "cheap as possible"(he and my dad are prone to that syndrome) ... fixed the problem no probs.

But I was warning him on the potential issues using cheap Chinese versions, and he also ended up getting a proper MAF from another store too .. just in case.
Has yet to use it other than it's initial test to check any differences between Chinese version and proper version.

over 2 years ago now .. not many klms(maybe 30-40K klms), but just goes to show, maybe they're not all as bad as some would have you think.

Do you need an maf connected with an 10p engine or is it just for the egr control and nothing really else??

Do you need an maf connected with an 10p engine or is it just for the egr control and nothing really else??

Mine is a 2002 EU3 so controls the auto so we shall see!

BTW my VDO branded one is 5 years old now and still going strong at 75KK. I originally bought it as the one on at purchase was causing a big drop out at 4000RPM because of OVER reading.
There is a thread about 5 years ago on it. Helped by Offtrack reading the live outputs.

Regards Philip A

Originally Posted by PhilipA

Mine is a 2002 EU3 so controls the auto so we shall see!

BTW my VDO branded one is 5 years old now and still going strong at 75KK. I originally bought it as the one on at purchase was causing a big drop out at 4000RPM because of OVER reading.
There is a thread about 5 years ago on it. Helped by Offtrack reading the live outputs.

Regards Philip A

MAF doesn't directly control the Auto on either EU2 or EU3.

The key difference between EU2 and EU3 is how the amount of air being drawn into each cylinder on the intake cycle is calculated.
On EU3 motors MAF and RPM are used for this purpose, while EU2 motors MAP and IAT to calculate the same parameter.
If you unplug the MAF on an EU3 motor, the ECU falls back to using MAP/IAT, and your EU3 will behave like an EU2 in terms of smoke limiters.
The smoke limiters basically set the maximum amount of fuel that can be injected for a given amount of air in the cylinder.

The MAF is used on both engines types to as an input into the EGR control.
The way the EGR seems to influence the Auto is by altering the calculated engine torque that is sent to the TCU.
When the Auto shifts it sends a torque reduction request to the ECU based on the calculated engine torque.
If there is a mismatch the TCU will either under or over compensate with the torque reduction leading to poor shift quality.

So if your cheap or worn out MAF misreads significantly it will throw both the fueling calculations and shift quality out.

On an EU2, if the EGR gear is removed, and - ideally - the EGR disabled in the engine map the MAF is basically an expensive joiner tube between the intake trunk and air box.

See how some of the cheap ones are made MAF Sensors - does this look right? | LandyZone - Land Rover Forum

Originally Posted by OffTrack

On an EU2, if the EGR gear is removed, and - ideally - the EGR disabled in the engine map the MAF is basically an expensive joiner tube between the intake trunk and air box.

what happens if the EGR is removed but it's not deleted from the ECU ? Does this throw any faults in the ECU ?

Reason I ask is that I have basically a virgin machine (nothing much has been ****** with) 1999 MYO and as yet have got around to doing the EGR delete, but I wanted to wait a while before getting a NNN ECU, namely because I'm unsure what could be causing the current problems I am seeing (after reading this, I am wondering if it is MAF related now)...

I tried some chinese mafs and sent them to the rubbish bin, they were giving incorrect readings.