28 replies to this topic

[P11 COV]

Paul, how have you fitted the inlet pipe with your BMC. Is it pointing downwards and away from the intake grille? I've got a BMC airbox to fit in mine (I've relocated the ECUs onto the bulkhead behind the passenger seat and the standard airbox won't fit in place now). I planned to minimise the effect of water getting in by placing the pipe vertically downwards, and possibly blocking off the lower sections of the intake grille. I had a BMC on my turbo for a few months when I forst got it, without any problems, but it was dry for the whole time.

I'm on my fourth AMM anyway, so if I can get away with only 1 failure per year I'd be reasonably happy.

I had it pointed towards the air intake. And Joe.....I use the car every day whatever the weather.

[walkes]

/Thinking out loud Could the increase in air mass/flow be causing the AMM too fail. Do these not produce a higher and higher voltage for the increase mass/flow. Would it not be worth while placing something in front of the said intake to decrease the flow and record the voltage coming from the AMM? Not sure at what point the AMM would blow?

[walkes]

Any sparkies out there able to try this ?

[paulf-cam]

/Thinking out loud

Could the increase in air mass/flow be causing the AMM too fail. Do these not produce a higher and higher voltage for the increase mass/flow. Would it not be worth while placing something in front of the said intake to decrease the flow and record the voltage coming from the AMM?

Not sure at what point the AMM would blow?

This is bonkers, isn't it? What happens when you get a remap and up the boost? Surely the airflow rate is increased? If that was the cause, then remaps would break AMMs too!

Ta, Paul.

[garyk220]

I'm fairly sure the failures are due to water ingress. I had the BMC filter on my car for a few weeks after running my car in, and somehow managed to avoid driving it in the rain for the best part of 4 weeks that summer, with no failure. I had 2 failures with a foam filter fitted. The first was at Hockenheim not long after driving on the autobahn in a torrential downpour, and the second was one 'summers' day up at Knockhill Both times the foam filter was saturated, so it's reasonable to assume water droplets may have got as far as the hot wire in the AMM.

[walkes]

So does this mean we are finally agreeing that it is water ingress that is casing the problem... ? Someone please investigate! P11COV would it not be worth posting pics of where you inlet pipe was

Edited by walkes, 23 June 2006 - 06:56 AM.

[davehutchinson]

Well the AMM failed on mine with no rain at all :/

[two4oneuk]

I fitted a new courtney panel filter (ebay) had read several posts about AMM failure but tried it anyway. The test was the same road ( dry day ) i use every day driving the same way and the EML came on within 10 miles. Swapped the filters back took car to dealer and he confirmmed the AMM had gone. Drove the car home and waited 2 days fro new AMM to arrive. Car now fine using standard paper filter and now having stage 3 + VXR turbo the car is pulling a lot more air in and drove 700 miles since saturday with no problems. Have a nearly new courtney filter for sale only used for 20 miles!!

[walkes]

Well the AMM failed on mine with no rain at all :/

did you have a foam filter or Paper ?