Air suspension woes

ranger1942 · Mar 25, 2015

Anyone know what pressure the P38 Air suspension pump should operate at. Tested mine and its only going up to 10lb , got a feeling i read somewhere should push out 150lb.

brianp38dse · Mar 25, 2015

Sounds like it need a new seal kit put in, easy job.

Datatek · Mar 25, 2015

Put you finger over the end of the blue tube from the compressor, if you can stop the air it's fecked. Look at Wammers guide in the "How To" section.

Grrrrrr · Mar 25, 2015

ranger1942 said:
Anyone know what pressure the P38 Air suspension pump should operate at. Tested mine and its only going up to 10lb , got a feeling i read somewhere should push out 150lb.

You're in the right ball-park. There's a thread on here where 2 senior members politely discuss the exact cut-out point but it IIRC is somewhere above 115psi!

wammers · Mar 25, 2015

If you fit a pressure gauge to compressor, a good one should hit around 175 PSI in a few seconds. Refurb the compressor if you only get 10 PSI, it is really ready for it. New piston seal and cylinder. New exhaust O'ring stuck in place with silicone sealant. Reset inlet and exhaust valves as my "How to". Good luck with it. Cut out point is 140 PSI plus or minus 7 PSI.

ranger1942 · Mar 26, 2015

Thanks for the info lads. I made up a guage, only 10lb showing , so have to put my hand in my pocket now, LOL

ranger1942 · Mar 26, 2015

Hi fellas, just had a new compressor , fitted it, vehicle wouldnt raise, took it off, connected the guage, shows 7 lb ???? Now i'm stumped, have i got a faulty new compressor, or should the air pressure be checked at the tank ???. Tempted to fit a schrader kit to it !!!!

Bladerunner919 · Mar 26, 2015

When you say a new compressor, do you mean brand new or just an alternative one? Why not just rebuild the one you have? I bought a kit that does the compressor and valve block for about £50.

wammers · Mar 26, 2015

ranger1942 said:
Hi fellas, just had a new compressor , fitted it, vehicle wouldnt raise, took it off, connected the guage, shows 7 lb ???? Now i'm stumped, have i got a faulty new compressor, or should the air pressure be checked at the tank ???. Tempted to fit a schrader kit to it !!!!

As i said earlier compressor should give around 175 PSI. Would say providing the inlet reed is sound the exhaust reed is not seating on it's O'ring in your new compressor.

ranger1942 · Mar 26, 2015

Brand new compressor,sent it back now. Taken the easy route now, connected air bags to T pieces, , 1 schrader valve and pumped it up with the air line. Straight up like a good un. Going to remove valve block, fit a small compressor in there, T piece so i can pump tyres up , and raise suspension, Line inside the car, with tap to let air out when i want to lower it. Switch to operate compressor. Get rid of all the electronics .

domino · Mar 26, 2015

Would be cheaper and easier to return the valve block and compressor surely?

wammers · Mar 26, 2015

ranger1942 said:
Brand new compressor,sent it back now. Taken the easy route now, connected air bags to T pieces, , 1 schrader valve and pumped it up with the air line. Straight up like a good un. Going to remove valve block, fit a small compressor in there, T piece so i can pump tyres up , and raise suspension, Line inside the car, with tap to let air out when i want to lower it. Switch to operate compressor. Get rid of all the electronics .

Another EAS bodge up for the sake of half an hours work. You can't make it up.

Bladerunner919 · Mar 26, 2015

ranger1942 said:
Brand new compressor,sent it back now. Taken the easy route now, connected air bags to T pieces, , 1 schrader valve and pumped it up with the air line. Straight up like a good un. Going to remove valve block, fit a small compressor in there, T piece so i can pump tyres up , and raise suspension, Line inside the car, with tap to let air out when i want to lower it. Switch to operate compressor. Get rid of all the electronics .

How are you going to ensure that the four corners of the car maintain a similar height/airbag pressure? Or are you going to just drive it around and deal with unpredictable handling as it arises? And make sure you inform your insurance company that you've compromised the suspension on your car, because they sure as hell won't pay out if you have an accident that they can attribute to your modifications. Which will be any accident you have.

Datatek · Mar 26, 2015

ranger1942 said:
Brand new compressor,sent it back now. Taken the easy route now, connected air bags to T pieces, , 1 schrader valve and pumped it up with the air line. Straight up like a good un. Going to remove valve block, fit a small compressor in there, T piece so i can pump tyres up , and raise suspension, Line inside the car, with tap to let air out when i want to lower it. Switch to operate compressor. Get rid of all the electronics .

Not to put too fine a point on it, that is plain fecking stupid

The electronics are reliable, as is the rest with a little maintenance. compressor has probably failed due to leaking airbags so it is unlikely to stay level with your arrangement.

Druim · Mar 27, 2015

ranger1942 said:
Brand new compressor,sent it back now. Taken the easy route now, connected air bags to T pieces, , 1 schrader valve and pumped it up with the air line. Straight up like a good un. Going to remove valve block, fit a small compressor in there, T piece so i can pump tyres up , and raise suspension, Line inside the car, with tap to let air out when i want to lower it. Switch to operate compressor. Get rid of all the electronics .

Don't:rolly::emps1:

tomcat59alan · Mar 27, 2015

ranger1942 said:
Brand new compressor,sent it back now. Taken the easy route now, connected air bags to T pieces, , 1 schrader valve and pumped it up with the air line. Straight up like a good un. Going to remove valve block, fit a small compressor in there, T piece so i can pump tyres up , and raise suspension, Line inside the car, with tap to let air out when i want to lower it. Switch to operate compressor. Get rid of all the electronics .

You sure the gauge was reading correct? Sounds like a very bad plan to me, for all the reasons listed in the above posts.

JamesBB · Mar 27, 2015

quavey · Mar 28, 2015

Put it this way, its another ruined and even more worthless P38... Eventually thats got to make the working ones worth more!

JamesBB · Mar 28, 2015

quavey said:
Put it this way, its another ruined and even more worthless P38... Eventually thats got to make the working ones worth more!

Agreed, there are so many that are not properly fixed and devalued by coils and manual pump up kits. The cost of fixing it properly is (in the long term) cheap in comparison to any other option.

ukadamwest · Mar 28, 2015

wammers said:
another eas bodge up for the sake of half an hours work. You can't make it up.

+1

datatek said:
not to put too fine a point on it, that is plain fecking stupid

+1

Air suspension woes

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