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hi Searover.. hi back, Searover.. so.. it seems, that the doorman china-made Hitachi knockoff is a POS.. materials and finish of the piston and sleeve make it fail in 1 year. The OEM real Hitachi lasted 10 yrs, and still its head is in top shape.. but the motor did burn out. So the hybrid...

talking to myself here... ;) OK, so.. i took the dorman 'hitachi' (made in PRC) unit apart.. the inside of the bore is all scratched up, the wrist pin came out on disassembly.. pretty clear. The old unit was made in Japan, and had the LR logo.. so Im guessing it was the original, or OEM...

OK.. so it's a year later, and the doorman 'hitachi-style' has failed.. The motor runs, but barely produces any pressure. Its possible of course I have another issue.. which makes the compressors work overtime.. but i checked for leaks (while off.. so all the valves are closed.. yes its...

great info.. but I need more.. please explain more... What should I see? how do I test? I presume when it's calibrated, somehow I need to set the physical height on all 4 corners, or just make sure it's all the same? Then I presume the controller sets that as nominal? I need step-by-step...

Havent checked the connectors, but drove it 200 miles yesterday, and a few miles today. It seems when I start the car, every time there's a k-tchhhh.. a couple of seconds of air release, then the compressor comes on, sometimes for a minute, sometimes for 5 sec. I think if I move before the...

okedockey.. will do. thx

ok.. today toook it to work, thats 40mi one way. The normal height seems good. The compressor cycled when I first started it, but it doesnt run, nor do I see or hear any deflation. BUT.. the susp warning messg/light came on yellow, special programs disabled, almost right away. AAAND.. 2...

alright... freaking flaky, hate it.. but things moved a bit: after sitting at offroad height for few hours, I was able to command it to lower to normal height. corner heights stable at < +/- 5mm , gallery press was 1770kPa (257psi.. abt right), but then slowly bled down to 1k, 500, down to...

so its still stuck in offroad height.. the code is.. C1A13.. 'Pressure does not decrease when venting gallery' .. duuuh really? compressor is not running.. which valve is a likely culprit? or a connection? I kinda think a valve.. a faulty valve would explain both cycling at normal height and...

I didnt fit a new relay.. just swapped the engine relay for it. now I have a new relay, came w. compressor. I'll fit it. dont see the point tho. The 3 levels: so yesterday, I did cycle it thru the 3 levels, and it achieved the 3 levels OK, all lights going out. But at normal level...

wow , slow down Gary.. it's like drinking from a fire hose.. ;) I bought a hitachi-type compressor, so no recalib is needed I was told. I didnt test anything for leaks.. I figure I'll chase leaks only if suspension goes down overnight, with fuse out. I have a code reader.. damn forget the...

OK.. the compressor is in... It runs. but.. first, it ran for at least 3 mins, and the suspension didnt come off the bump stops. When I selected offroad height, it pumped up in 10-15s to full height and shut off. Then I selected normal height, and it bled out air, until it stopped at a nice...

OK. indeed, the motor is dead. One of the 4 brushes burned out, burnt off the lead, and even burned the little pcb base under it.. so no chance repairing it. And the brushes were actually had 80% meat left on them. So .. I dunno.. disturbing. What's also disturbing, is that the assembly...

will do.. I found the list of other conditions that block compressor running.. have to do with accel, decel and motor temp. So unless a sensor is broken, it should not be relevant. And the temp sensors are internal to the compressor. anyway. have smthng to work with. BTW. .I listed the codes...

yes yes and yes.... all those fuses and the relay are OK ;) and I have power at the compressor, on the main power connector. But Ill take it out and bench test it. Like I said , I have a fear that there a signal on the other connector that's stopping it from running. Since everybody says that...

yes.. all fuses are OK, and relay is ok.. thus the voltage on the compressor main power .. I studied that manual page last night.. invaluable.. EXCEPT.. it does state there are certain conditions that will block the compressor from running.. So that confirms my fear that 12V on compressor does...

Thanks, Gary. it's a 2005.. the compressor looks oem. There is voltage (14.5) on the main supply connector to the compressor. But I dont know for sure that means it should run, or there are conditions/signals which are carried on the lower gauge wires, or some internal sensor conditions that...

I am sure this was covered before, but Im too frustrated to search.. please forgive me. So since I got it used w. 100k miles 5 months ago, it has had the 'special programs not avail, normal height only' condition. I heard it self level before, and also heard compressor pump up. Now it's all...