Two annoying problems...please help

[GinNBoost]

Ok well I have two annoying problems that have been occuring as of late. For starters, my car has been acting weird upon start up. It would start up but then stutter and either die or just barely stay running and stay at normal idle. I replaced the battery and it seemed to fix the problem but a few days later the problem came back. I suspect its my spark plugs which may attribute to my poor gas mileage, but I'm just wondering what anyone else thinks could be the cause...

As for my second problem. For a while I had a loud squeeking coming from my back shocks. I recently brought it to a garage and the guy there said I had bad bushings and that they were being affected by the fact that my car is lowered. Now what he did for the meanwhile is just grease up the bushing and while it does not squeek anymore I'm wondering how long before the grease/oil runs out. But shoud I replace my bushings? He said they cost around 90 dollars to install...that's a bit steep. Well any suggestions and solutions would be great. Thanks...

 

[4geze63]

mine did the same thing exept it happpend after driving it on the freeway and when I would keep the car running to cool down the turbo it would sputter and die, what I did was got the injectors cleaned aswell as the fuel lines, it costed 149.99$ and was deff worth it, car has been idling perfect since i got it done, not to mention seemingly more power and the turbo is louder through all gears.