P38A eas

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
Hi
think I am going to have to do a complete recalibrate when weather clears up but it is just one of those things I can't get my head around you know something that should be simple but you just can't see it for looking hey ho never mind will keep going until I get it
 
wammers said:
Even if you set it with blocks you must try to get the front within two bits side to side. Can be done by tweaking the connecting rods. Rear does not matter as much.
Click to expand...

Why within two bits ?? Provided the Left & Right airbags are roughly equal pressure when the car is levelled on the calibration blocks, then the actual heights and the "equalise pressure" mode should be close. The ECU should not care if the Bit values are quite different as long as they are within the acceptable range for that height.
 
pwood999 said:
Why within two bits ?? Provided the Left & Right airbags are roughly equal pressure when the car is levelled on the calibration blocks, then the actual heights and the "equalise pressure" mode should be close. The ECU should not care if the Bit values are quite different as long as they are within the acceptable range for that height.
Click to expand...

Because that is what Land rover say to do. Each time the car speed drops below 1 MPH the front valves open to equalise pressure across the front axle. If the bit count is different and pressure is greater at one side because of driver weight, one side will drop and then rise to reach it's stored bit count. One side will rise then drop to match the stored bit count. That is the dancing effect some complain about. The drivers side will always have more pressure in than the passenger side if there are no passengers. When the driver gets out and shuts the door the car will self level to regain it's set bit counts. The rear does not matter as much.
 
Last edited:
I suspect there's an error in the EAS SID descriptions. It does say "Each rear sensor individually should be within 2 bits of the other. The same holds true for the front axle sensors", but it also says ". . . leveling could take place if any height sensors actual value differs from its target value by more than ± 2 bits". Surely manufacturing tolerances on the height sensors & brackets would be greater than this, hence even brand new vehicles would dance around unless LR tweaked the sensor positions to compensate !!

On mine the front L & R values are definitely different by >>5 bits. The car is nice & level, and I don't get any dancing about. I can also feel the front equalisation working when I stop at the lights. The 3 second equalisation when exceeding 1mph is not really noticeable, especially if the road is bumpy.

But this is all just opinion based on the EAS SID & my car's behaviour !! sounds like a discussion to be had over a pint one day . . .
 
pwood999 said:
I suspect there's an error in the EAS SID descriptions. It does say "Each rear sensor individually should be within 2 bits of the other. The same holds true for the front axle sensors", but it also says ". . . leveling could take place if any height sensors actual value differs from its target value by more than ± 2 bits". Surely manufacturing tolerances on the height sensors & brackets would be greater than this, hence even brand new vehicles would dance around unless LR tweaked the sensor positions to compensate !!

On mine the front L & R values are definitely different by >>5 bits. The car is nice & level, and I don't get any dancing about. I can also feel the front equalisation working when I stop at the lights. The 3 second equalisation when exceeding 1mph is not really noticeable, especially if the road is bumpy.

But this is all just opinion based on the EAS SID & my car's behaviour !! sounds like a discussion to be had over a pint one day . . .
Click to expand...

Fronts should be within 2 bits side to side for the reason given. Done by tweaking the connector rods when blocks are used. Heights with sensors within 2 bits should be plus or minus 7 mm from centre of wheel to arch lip side to side.
 
You must log in or register to reply here.

Similar threads

IandiscoV8
P38A EAS Fault finding threads or files.
2 3
Replies
55
Views
4K
Mark Piercy
Mark Piercy
DollyBird
P38A Searching for die hard P38 guru - EAS
Replies
9
Views
437
brianp38dse
brianp38dse
A
Sport Air suspension driving me mad
Replies
11
Views
523
aco
A
Paul Coddington
EAS being a pain, again
2
Replies
26
Views
2K
Paul Coddington
Paul Coddington
8v_chris
Air leak detection - EAS woes!
2 3
Replies
52
Views
4K
j38
J
Back
Top