M

mjb.thomassen

Member

• Jan 17, 2025

• #1

My maf sensor from p38 4.6 goes from 5v with only contact on to 6.8 v when idling.
The previous time I had a broken maf the voltage did not go up at all.
Unless voltage goes up ,is this a faulty maf ?? .
The engine runs very bad and far too rich and regulary stops running also without maf.
Crank en camshaft sensors are good.
No leaking injektors(cheçked).rail pressure 2.4.

 

Mark Piercy

Well fumbled member....

Full Member

• Jan 17, 2025

• #2

Does the measurement change with engine speed?
Is it a three wire plug?
Earth,
5v and12v? Or
Earth,
5v and 5v?

 

M

mjb.thomassen

Member

• Jan 17, 2025

• #3

3 plug earth 5v 12v

 

M

mjb.thomassen

Member

• Jan 17, 2025

• #4

Voltage goes slowly up

 

Datatek

Well-Known Member

• Jan 17, 2025

• #5

mjb.thomassen said:

Voltage goes slowly up

Click to expand...

As the hot wire resistance lowers with increased airflow, the output voltage should go up unless there are some electronics involved that dictate otherwise.

 

M

mjb.thomassen

Member

• Jan 17, 2025

• #6

I thought the idling voltage was 1.5 v and from there it goes up.
My problem is the much higher voltage.
Doesn t That give a much higher output from the ecu