P38A EAS keeps farting at me!

Has any one experienced their EAS system letting out air in short farty bursts, a bit like the sound of air brakes, when driving normally?

No, don't hear it over road/engine noise while driving.
Do you have a leak, maybe as an airbag flexes?

kermit_rr said:

No, don't hear it over road/engine noise while driving.
Do you have a leak, maybe as an airbag flexes?

Click to expand...

Er hmmm, what road noise @kermit_rr yours in on house bricks iirc

kermit_rr said:

No, don't hear it over road/engine noise while driving.
Do you have a leak, maybe as an airbag flexes?

Click to expand...

air bags are new. Sounds like the valves letting air out. But ride height not changed, so there must also be some pressure being added.

do you have a nanocom or similar? get a friend to watch the valve states while you drive?
the only noises I hear are click click click from the solenoids and a pfft pfft from the exhaust

Bet the air exhaust silencer has felled orf or loose.

kermit_rr said:

do you have a nanocom or similar? get a friend to watch the valve states while you drive?
the only noises I hear are click click click from the solenoids and a pfft pfft from the exhaust

Click to expand...

The pfft pfft is yer headgaskets blowing

Flossie said:

The pfft pfft is yer headgaskets blowing

Click to expand...

yes and the click click is the liners going on holiday

Well, the symptoms i described were the predecessor to a eas failure. Now down on the bump stops, pump runs and generates pressure but you can hear the pressurised air escaping loudly and the pressure is not getting to the air bags.

Salisbury Nick said:

Well, the symptoms i described were the predecessor to a eas failure. Now down on the bump stops, pump runs and generates pressure but you can hear the pressurised air escaping loudly and the pressure is not getting to the air bags.

Click to expand...

Diaphragm valve failure is the most likely culprit.

Ours adjusts à little on the bumpy road but will settle at motorway speeds. It does sound like the exhaust filter has popped off or opened. It can also do this if there is a conflict between height sensors and the ecus programmed heights. As said also a leak will cause the car to adjust to maintain its programmed heights.

Salisbury Nick said:

Has any one experienced their EAS system letting out air in short farty bursts, a bit like the sound of air brakes, when driving normally?

Click to expand...

If you take the exhaust filter off then it sounds like a truck as it vents but it doesn't normally do that going along. Is the pressure switch in the valve block doing its job? Or is the compressor running all the time causing it to vent?

Datatek said:

Diaphragm valve failure is the most likely culprit.

Click to expand...

This would be one of the four valves on top of the valve block or is there another valve I need to check? How would you recommend I check for this fault?

Flossie said:

Bet the air exhaust silencer has felled orf or loose.

Click to expand...

Hi, sorry to be a pain, but how can I check for this?

Salisbury Nick said:

This would be one of the four valves on top of the valve block or is there another valve I need to check? How would you recommend I check for this fault?

Click to expand...

The diaphragm valve is internal to the block. At one end of the block there is a separate bit held by 4 screws. Take that off and you will see the valve a round disc. Pull it out and you may well find that it has split.

Salisbury Nick said:

Hi, sorry to be a pain, but how can I check for this?

Click to expand...

White plastic tube shaped thing, rear of the valve block if its still there. It silences the exhaust air.

Datatek said:

The diaphragm valve is internal to the block. At one end of the block there is a separate bit held by 4 screws. Take that off and you will see the valve a round disc. Pull it out and you may well find that it has split.

Click to expand...

Can you do that with the block insitu keith? Just curious.

Flossie said:

Can you do that with the block insitu keith? Just curious.

Click to expand...

I doubt it

Datatek said:

The diaphragm valve is internal to the block. At one end of the block there is a separate bit held by 4 screws. Take that off and you will see the valve a round disc. Pull it out and you may well find that it has split.

Click to expand...

AWESOME. Thanks @Datatek

Datatek said:

I doubt it

Click to expand...

Ooh. That’s also very useful to know. Thanks @Flossie and @Datatek