Thread: EAS Compressor running to long.

Hi Phil

A few things to check out:
Air leaking past the non-return valves might trigger that fault. Did you put them back in like the pic below and use no Vasoline or grease on them?


From memory, the inlet valve solenoid is the second from the right in the photo below


Did you replace the o-rings on the shaft and underneath the solenoid? Not sure what the "correct" procedure is for cleaning the solenoid but I used a bit of the o-ring grease to lubricate the bits that move.


How was the diaphragm on the block? Any signs of wear or tears?


Cheers, Paul.

Hi Paul, Thank you for the reply. I followed your very well detailed guide for valve block repair & made sure the three valves were clean and free of grease on reassembly. The only seals I didn't replace were the solenoid shaft seals as they appeared OK I did replace the inner and outer seals underneath and the soapy water test show no evidence of external leaks. The diaphragm appeared to be in good condition so I used it again.

I have searched the web a bit more and found a few references to faulty height sensors causing excessive compressor run time. The only fault I have had is "inlet valve stuck open" and this has not happened again since valve block overhaul. If the sensors were faulty shouldn't this result in a hard or soft sensor fault showing up. Regards Phil

It's also a good idea to replace the teflon seal on the compressor piston.

When it is worn, it is much less effective and the compressor has to work twice as hard as normal to achieve the same result.

This repair often negates the need to replace a compressor.

Dave

Thanks Dave, I did replace the compressor seals using Airbag Mans kit before doing the valve block seals. I almost feel like redoing the valve block again but I don't think it will make any difference. What I might do is rig up a light to show me how often the compressor is running when I am driving as been a deaf git I cannot hear it. The only test I have done is with the bonnet up, Is it possible that compressor may not be running so often when moving? Phil

Originally Posted by philjphil

Any help on what to check next would be appreciated. How often should I expect the compressor to run when parked with height stable?

Parked and height stable the compressor shouldn't be running at all unless you have a leak or it's below minimum pressure. It should only switch on when (resevoir) pressure is low and turn off when pressure gets to its high value. I fitted a simple pressure gauge ($10) to mine to see exactly what was going on. It should be stable in the 135-155 psi range from memory. A pressure gauge would let you observe what pressure its up to at least and maybe observe it dropping due to leaks.

Thanks Junosi. Where is the best place to T pressure gauge?

I've put my 'T' junction on the air tank resevoir line fairly close to the valve block - which then connects on to my pressure gauge screwed to the front of the car along with my schraeder vavles for my homemade eas bypass system.

Nice set up... I will try to pick up bits for simple weekend project. Thanks Phil