+40 km/25 miles, nothing so far.
seems to be sensitive to battery in my case, in both terms of voltage and capacity.
this gives me an idea that it was either the battery or some connector makes a short circuit.
will check connectors if it reappears.

 

I am really having a hard time with 'the pump is bad'. I drove 18 miles over 40 minutes start stop and highway with 1 light. I get into my allotment and 3 lights. Pumps dont make more or less pressure randomly. Not with all else being equal. I am pretty sure that I still have air in it or a loose wire. I still havent 'screamed the pump'

So maybe that will knock it loose....

 

inspect your wiring, your battery and all.
we already know that it might be the fuse in positive terminal, relay problem or drained battery.
this pump is sensitive to electricity, i can tell you for sure from my own experience. check voltage in every part of wiring.

bleed the system really well until no air comes out. have someone help you, move the steering from side to side while bleeding so that the atf comes out real good.

could be a sensor problem (when the pump itself is fine but sensor reports wrong voltage to ACD ECU). pressure sensors are sensitive as well, so take care. cleaning sensors with wd40 also helps sometimes. if sensor is defective, it can be replaced separately, i have posted a part number already.

if all else fails, oil pumps are simple in operation, try to disassemble and clean it. it has a mesh filter inside which can be cleaned. a good mechanic can assist you with reassembly of the pump.

just don't go and buy a new pump assembly until you have exhausted all other cheaper options.

 

For Sure, Fingers Crossed.

 

25 miles more, pump's running great.

here are more threads with ACD lights connected to some work on battery
voltage issues are more common that i first thought.

https://www.evolutionm.net/forums/ev...w-battery.html

https://www.evolutionm.net/forums/ev...e-setting.html

 

ok, problem reappeared a day earlier.
next to be done is changing pressure sensor from a working pump and possibly a pump reassembly. here's some UK guy showing us what goes wrong in his pump..

http://www.lancerregister.com/showthread.php?p=3871190

USDM ACD pump should be very similar in operation, only having 1 solenoid instead of 3.

 

Nice find. I cant believe something with so much oil in it is corroding so badly. Thats gotta to be a poor material choice.

I changed my battery yesterday, so my voltage is very good as well. Let me know if that pressure switch helps you.

 

^ Wow, that is GREAT info. I have an old IX pump with code 82 that I may tear into with some confidence to fix it after seeing those pics.

 

ok guys, disassembled the pump today.
the pump was all covered in salt, aluminium was corroded - so we opened it up. sorry, i didn't take pictures, my bad

no need to open an electric motor cover - as Steffen said, they rarely break. so we just left it alone.
be sure to have a metal brush, a knife and a can of gas handy, just to clean everything. also, some silicon for rubber and wiring connectors. you'll need a set of allen wrenches as well.

after disassembly, bled it with MUT 3 and it seems it works fine now. time will tell, i'll take it to a test drive tomorrow.

i wonder if i should have applied some loctite around pump sections, just to be sure that no water gets into it ever again...

 

So you hit the wall on it and went for the pump. How did you get access to a Mut 3 and can this operation be done without one ?

I assume that you wire wheeled it or something to remove any corrosion ? Keep us posted...

 

we actually had the ability to borrow MUT iii tool for a couple of hours, so we went that way.

from my experience, bleeding with MUT and with gas pedal does not make much of the difference. you should be able to clean the pump thoroughly with those items i mentioned in previous post.

i will update the topic when i drive it a bit more.

 

in case someone needs a pressure sensor, a lancer shop link.

http://www.lancershop.com/customer/p...=62&page=&js=n

 

So what can be done to prevent this from happening again? Some sort of cover or enclosure needs to be made to keep this thing from the elements. It's already becoming a problem on the X's too.

 

Funny the same thing is happening to me right now, but in my case it will drive fine with one light on around town but as soon as I get up to about 70mph or get on the highway all 3 lights light up. I believe my pump is working due to the turning the key forward and holding the throttle down thing, I can here it and it sucks the fluid down in the resevoir. I believe my pump is working but not providing enough pressure above a certain speed. This and the abs speed sensor issue man... geez....

 

from what i have seen, X pump is very similar in design to what we have on IX.
however, most of Xs are covered with warranty, so should you have any problem, make your dealership replace the pump assembly.

prevention i think should include applying some loctite in corrosion-prone parts and possibly a cover.

cusco makes this product for CT9A, so someone in evo X world should come up with similar measure. have a look:

http://cgi.ebay.ie/Cusco-Safety21-Al...-/230453688667

i'll see how this pump performs and then i'm going to add up some sort of protection like this on my car during summer. so far things look good.