chopper007 · Sep 21, 2013

Hi All,
first off.. please bear in mind i have no real mechanical knowledge.. but looking to learn how to look after my beloved 1999 P38..

the suspicion has been great for ages ( previous owner replaced the bags etc i belive )...

but recently when i leave the car over night it has lowered....
soon as i start up.. it 'jumps' up the the right height... no the compressor is perfect.. drops and lowers etc on motorway correctly...( it is parked at a jaunty angle on the drive at home.. but i did park it Lever the other day.. and it had def lowered )

so what is the usual cause for a slow small leak ? and am hoping, what is the easy test / fix... ?
and if anyone is close to huddersfield / wakefield and wants to help me...

appreciate any thoughts.... please be gentle.. and include as much info / pics/ and source for parts as poss....

wammers · Sep 21, 2013

If it rises straight away that means all is good on pressure side. Sounds like you have a slow leak on either a bag or a valve block solenoid valve. Park overnight with the boot top not latched. See which corner drops. That is the one to play with. A slight drop overnight is acceptable, on the bump stops is not, and needs attention.

chopper007 · Sep 21, 2013

hi, thatnks for the advice, will try that next week and see what result i get...

what is there to check on the valve bloke ? it is easy for me to test / fix ?

wammers · Sep 21, 2013

chopper007 said:
hi, thatnks for the advice, will try that next week and see what result i get...

what is there to check on the valve bloke ? it is easy for me to test / fix ?

Look at my EAS "How To" at top of page links to things in there may give you some idea as to what is involved.

gfromleeds · Sep 21, 2013

Int there a relay he can pull to freeze the eas rether than leaving it open overnight?

Druim · Sep 21, 2013

gfromleeds said:
Int there a relay he can pull to freeze the eas rether than leaving it open overnight?

I just pull the relay & 2 fuses in fusebox when testing repairing

wammers · Sep 21, 2013

gfromleeds said:
Int there a relay he can pull to freeze the eas rether than leaving it open overnight?

Yes but as the OP stated he had little or no mechanical knowledge it is possibly easier to leave the tailgate unlatched than pulling the wrong relay.

TCubed · Sep 21, 2013

Does the ECU freeze if a door is half closed - ie cannot be opened if locked but not properly shut?

Saint.V8 · Sep 21, 2013

TCubed said:
Does the ECU freeze if a door is half closed - ie cannot be opened if locked but not properly shut?

Yes, the system will be frozen in such a state!

Datatek · Sep 22, 2013

Druim said:
I just pull the relay & 2 fuses in fusebox when testing repairing

No need to pull anything when repairing, and just the relay under the seat to freeze it, but as Wammers said, it's easier to just leave the tailgate unlatched unless it's in a place where it may get interfered with.

Druim · Sep 22, 2013

Datatek said:
No need to pull anything when repairing, and just the relay under the seat to freeze it, but as Wammers said, it's easier to just leave the tailgate unlatched unless it's in a place where it may get interfered with.

It's a lot easier to pull relay/fuses in fusebox than delay relay under seat, also give you safety that nothing happens should anything, including person, fail

Some friendly person may close the tailgate or door you "forgot"

wammers · Sep 22, 2013

Druim said:
It's a lot easier to pull relay/fuses in fusebox than delay relay under seat, also give you safety that nothing happens should anything, including person, fail
Some friendly person may close the tailgate or door you "forgot"

You should never work on your back under a P38 with the suspension extended unless the chassis is on stands. Or they are at least positioned in case of sudden deflation.

Datatek · Sep 22, 2013

Druim said:
It's a lot easier to pull relay/fuses in fusebox than delay relay under seat, also give you safety that nothing happens should anything, including person, fail
Some friendly person may close the tailgate or door you "forgot"

Never work under air suspension unless the car is supported as whatever you do it may still come down.
The underseat relay is the quickest and easiest freeeze.

Datatek · Sep 22, 2013

wammers said:
You should never work on your back under a P38 with the suspension extended unless the chassis is on stands. Or they are at least positioned in case of sudden deflation.

Bugger, your typing is getting quicker Tony, you beat me to it

gazzab79 · Sep 22, 2013

wammers said:
You should never work on your back under a P38 with the suspension extended unless the chassis is on stands. Or they are at least positioned in case of sudden deflation.

+2 I learnt that the hard way

TCubed · Sep 22, 2013

wammers said:
You should never work on your back under a P38 with the suspension extended unless the chassis is on stands. Or they are at least positioned in case of sudden deflation.

Why is it fine in standard height? :/

Datatek · Sep 22, 2013

TCubed said:
Why is it fine in standard height? :/

It's not and Wammers never said it was.

Saint.V8 · Sep 22, 2013

TCubed said:
Why is it fine in standard height? :/

Never fine to work under an unsupported Air suspended vehicle at any ride height.

TCubed · Sep 22, 2013

Datatek said:
It's not and Wammers never said it was.

Ah my apologies, I misread it as "in extended"

Druim · Sep 22, 2013

wammers said:
You should never work on your back under a P38 with the suspension extended unless the chassis is on stands. Or they are at least positioned in case of sudden deflation.

Never said it was, kinda logic

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