14cux air flow meter death

[100SRV]

Hi,
the air flow meter on my 14cux system "died" on a short motorway trip, there is a paper element air filter so I suspect that rules out oil contamination of the sensor filament. What other likely causes should I look for?

The AFM was reconditioned in 2016 so I would estimate has covered about 20,000 miles.

The "death" was announced by the Rovergauge fault code tool and seems to be confirmed by fitting a spare AFM and having normal service restored.

[GreenV8S]

There's a pretty good description in http://www.g33.co.uk/pages/technical_fuel_injectio... which describes some simple tests you could do to confirm the problem. They were pretty cheap at one time although getting rare now. If you're keen to repair it, it may be as simple as a dry joint.

[100SRV]

Thank you, previous repair company no longer services these so I've no reservations about dismantling it now.

[paintman]

100SRV said:

Thank you, previous repair company no longer services these so I've no reservations about dismantling it now.

Which company did you use?

[100SRV]

paintman said:

Which company did you use?

ATP of Cannock.

[paintman]

Thank you.

[anonymous-user]

I'd imagine the Original part would be pretty easy to replace with a more modern AFM, using a suitable circuit to correct the output voltage to the correct flow calibration. (or you could probably do that physcially by simply modifing the effective flow area)

[100SRV]

Max_Torque said:

I'd imagine the Original part would be pretty easy to replace with a more modern AFM, using a suitable circuit to correct the output voltage to the correct flow calibration. (or you could probably do that physcially by simply modifing the effective flow area)

Tempting but I am considering a major update in the form of Omex 710 to manage EFi and ignition duties.

[blitzracing]

They are not easy to strip apart, as even once you cut the sealing off, the internal circuit board is held down against the hot wire sensors with spot welds in place of solder, so re making the joints is very difficult. Its not a complex circuit board, but even if you can get replacement parts (IC wise) it needs to recalibrated afterwards- you will see various trim resistors mounted on posts to do this, and Ive never yet managed to find a circuit diagram so I know what each one does. I did go to the effort of making a conversion PCB (below) to allow you to bolt either a Lucas 20 AM or the Bosch unit in direct place of the 5AM, but TBH with the relative ease of fitting a modern Bosch in its place and a remap (even on the 14CUX) you really don't need to mess around with such.

|https://thumbsnap.com/F7UWGXf4[/u


There are loads of 5AMs floating around the system now as people throw out the 14CUX for aftermarket. Give kits and classics a call, Im sure he will have some.

http://www.kitsandclassics.co.uk