I agree with Brian.. He brings up some good poitns.. just because the car was cheap doesnt mean its going to be cheap to maintain! No free lunch anywhere, boys!!
First order of business is to familiarize yourself with the active suspension. Email me (
[email protected]) and ill set you up with a FSM.. The FSM is meant to be read and understood, and that information can be used IN CONJUNCTION with the posts on the forum. maybe you already have a FSM in your car (check in the trunk where the spare tire is)....
Other than that, im going to respond to certain things in your post that caught my eye... please feel free to ask anything else you may want or anything that comes to your mind....
- The accumulators are generally what cause the active suspension to get its ride back.. There are 9 accumulators (you should know this by now), 4 on each shock and 5 elsewhere.... not many other things wear out in the system as long as the fluid is kept fresh, and by now, assume it hasnt been changed.....
Heres the first order of business, before you worry about any of this other crap.. Get the timing guides inspected and make sure thats kosher. If you need to replace the guides, have them toss in a transmission cooler while everything is taken out.... Also assume that no transmission cooler has been installed....
once the guides are set, you can then start replacing EVERY fluid and filter in the car.... PS fluid, active fluid, diff fluid, brake fluid, etc, etc.... new OEM air filter, the list goes on..... this also includes the spark plugs... Then you think about resealing the valve covers if theyre leaking and doing the plenum job....
At this point, you should be pretty much caught up on maintenance.... From here, you can start fooling around with the suspension. Every bushing will need replaced, especially the front. upper links, tension rods, sway bar bushings, strut mounts, etc... Then the accumulators can be replaced.... proabbyl best to start with the 4 main ones, then move on to something else and save the other 5 for later...
now that the car has fresh fluids, all maintenance is caught up, the suspesion is good, now you can start dealing with brakes and tires... I wont go into much detail here because its all self explanitory....
after you get ALL that done, then you can start doing more nit picky things, like the interior stuff, and things of that nature.....
Just to let you know, this is the order that i did everything on my Q45.... I dont recommend doing anything that I wouldnt do !!!!!
Of course, all of this assumes that any and all other problems have been addressed, like MAF issues, fuel pump, injectors, etc..
one place to start would be to see how the injectors are doing. Go buy yourself a cheap VOM at walmart, and use the tutorial on Q45.org.... That will tell you if you have any bad injectors...
regarding the vibration, it is most likely the driveshaft, i think... I got a rebuilt one from power train industries out of california and i love it.....
Check and see how well the oil has been changed by taking off the oil filler cap (passenger side valve cover).... look inside with a small flashlight and it should just be a slight brownish color, nothing dark or black....
one thing i feel that i have proven is that you CAN maintain a Q45 to spec with a low budget if you use our sponsors for parts and DIY things...