P38A car on bumpstops, will not raise

wammers · Jun 16, 2020

Mark Piercy said:
It may be worthwhile checking the dryer for air leaks and checking the contents.
Undo the airbag feed pipes from the block.
Then try to raise the car, if they all blow air then the problem is further on.
If they don't, then the problem is possibly in the block.. None return valves the right way round?

Think the OP needs to go through everything again and make sure all is correct in the valve block. If the compressor is running for seven or eight minutes producing good air then stopping that air has to be going somewhere.

Datatek · Jun 16, 2020

wammers said:
As I have already said if the tank is full there is more than enough air to raise the car to standard height. No air is going in the tank.

If that were the case the compressor would not stop after 7/8 minutes and restart when the door is shut and the car tries to lift. If the compressor stops from an overheat it will not restart after the time it takes to get into the car and shut the door.
It should throw a fault but we do not know if the OP resets with his kicker between attempts..

wammers · Jun 16, 2020

Datatek said:
If that were the case the compressor would not stop after 7/8 minutes and restart when the door is shut and the car tries to lift. If the compressor stops from an overheat it will not restart after the time it takes to get into the car and shut the door.
It should throw a fault but we do not know if the OP resets with his kicker between attempts..

And therefore the high volume leak should be audible. A low volume leak from the fill line will not be. We don't know if the OP has carried out his valve block refurb correctly. My observations are based on everything being serviceable and as they should be. Normally and if all is good otherwise, access lamp on and goto height flashing is lack of air pressure. Which should produce a double fault of both rear valves stuck closed. As far as i am aware the EAS kicker does not record any faults but acts in the same manner as the Syncmate. And relays it's info through a series of flashing green and red lamps.

Datatek · Jun 16, 2020

wammers said:
And therefore the high volume leak should be audible. A low volume leak from the fill line will not be. We don't know if the OP has carried out his valve block refurb correctly. My observations are based on everything being serviceable and as they should be. Normally and if all is good otherwise, access lamp on and goto height flashing is lack of air pressure. Which should produce a double fault of both rear valves stuck closed. As far as i am aware the EAS kicker does not record any faults but acts in the same manner as the Syncmate. And relays it's info through a series of flashing green and red lamps.

In the car door shut and engine running would the OP have any chance of hearing a leak? I doubt it.

kermit_rr · Jun 16, 2020

nanocom lets you energise the compressor with engine off, does eas kicker do this too? would be easier to trace a leak with no engine noise

Datatek · Jun 16, 2020

kermit_rr said:
nanocom lets you energise the compressor with engine off, does eas kicker do this too? would be easier to trace a leak with no engine noise

Kicker just clears faults, no diagnostic capability that I'm aware of, that's why diagnostics might help

wammers · Jun 16, 2020

Datatek said:
In the car door shut and engine running would the OP have any chance of hearing a leak? I doubt it.

He could always shut the door and stand outside that amount of high volume air has to be audible. As said, if EAS system is working correctly goto lamp flashing is lack of air pressure. Plain and simple.

Mark Piercy · Jun 16, 2020

wammers said:
Think the OP needs to go through everything again and make sure all is correct in the valve block. If the compressor is running for seven or eight minutes producing good air then stopping that air has to be going somewhere.

I agree, à revision may well be needed to confirm

Henry_b · Jun 16, 2020

An odd thing that happened to a chap i know who has a P38..

The car was on its bumpstops and the compressor worked, we looked underneath the the bags were blowing out like balloons..

Making no effort to lift the car, they just blew out sidewards!

Odd.

tomcat59alan · Jun 16, 2020

Nobody has surgested a soapy water spray to check for bubbles, or perhaps they have, and bridging relay 20,pins 3 and 5 to run the compressor without the engine running.

Datatek · Jun 16, 2020

tomcat59alan said:
Nobody has surgested a soapy water spray to check for bubbles, or perhaps they have, and bridging relay 20,pins 3 and 5 to run the compressor without the engine running.

At the beginning he said it stayed up for 4 days when the bags were inflated with a compressor, so it is quite likely that the airbags are perished and is probably why the compressor needed replacement.

tomcat59alan · Jun 16, 2020

Just read that he changed the compressor, soft as it sounds, I take it the blue pipe to the compressor is tightened up?

P38A car on bumpstops, will not raise

wammers

No longer with us, RIP

Datatek

Well-Known Member

wammers

No longer with us, RIP

Datatek

Well-Known Member

kermit_rr

Very

Datatek

Well-Known Member

wammers

No longer with us, RIP

Mark Piercy

Well fumbled member....

Henry_b

Think outside, no box required.

tomcat59alan

Well-Known Member

Datatek

Well-Known Member

tomcat59alan

Well-Known Member

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