| i believe to have your alternator check out . but hope u do these simple steps even u prob had check all already. but my way of checking is simple. have the motor on idle . pull each injector connector n see if any changes if do then it works. if nothing change there is your problem bad injector. second way to find out to be sure coil pack issues , same step . pull out one coil pack connector n listen for changes if nothing , dont assume , u need to be sure by pulling out the coil pack n swaping out with an other to be sure if the coil pack does the same motion on idle changes or not. next step i did was , checking the ptu , does yours get hot after warm up ? or car turn off ? if do. you need to relocate the ptu sensor by the intake system. by using a ten bolt to hold it on n stay cold always . this what i did n so far my car runs better. Boost leak , hope u check for boost leaks. all boost hose warm up after the motor warm up which cause open holes to open more n cause problems . not sure if u have a turbo z . will put the link from you tube , ptu relocation . google it it shows u how to do it yourself simple n easy. [ http://www.youtube.com/watch?v=r5GXvacD_Nc ]
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