Ok life got in the way so I didn't get as much done as I wanted but I did manage to replace the air spring on the passenger side (the one that was hissing). Just to tired, cold and late in the day to tackle the other one and super bad storms predicted for tomorrow. So I put it back together and plugged the module in. Pump came on and it leveled up perfectly.
After cleaning up my tools and stuff I took it to jacks to get something to eat.
Cranked right up and ran fine. On the drive there I was amazed how smooth it rode. It drives better than my 2013 X5 ride wise. Very smooth. Even with just rear air suspension it makes a huge difference on rough roads.
Anyways I get to jacks and Im waiting at the window and I notice it starts to idle rough and the idle is getting lower and lower. Its down to 500 rpm when I put it in park. It seems to pickup some but still a little rough. After a minute or so idling in park it starts dipping down in rpms again. I end up having to give it a good bit of gas to keep it at 1000 rpm.
I get my food and pull off and as soon as I get out in the road I realize I have no power.
It barely accelerates. I get turned onto a long stretch of road at it isn't accelerating worth a flip. Actually it isn't "accelerating at all" just holding speed even with the pedal about 1/2 or more pressed. Then it surges and back to no power then after a few seconds another full power (normal power for the pedal position) and then no power again. It does this a few times and then just stays weak.
I nursed it back to the house and went inside. I came back out later and cranked it up and it seemed fine. I put it in gear and goosed the pedal and everything seems fine.
I had a check engine light with fuel trim 1 and 2 exceeded and a pedal error of some kind. Basically read something along the lines of not what was expected.
I will try again with it sunday since tomorrow is supposed to be so bad and I can barely walk right now from working on it
Symptoms made me think fuel filter, pump or the hose had come off at the maf meter. But I checked under the hood and everything looks ok.
Its been sitting since last june so no telling what I am dealing with now.