Ok i just an 87 GT with a paxton SN93 blower the car i know needs a tune-up for sure...But when its warmed up in Drive it seems to idle fine but if i put it in park it will stall...The when i re-start it it will idle for a few seconds and stall...I have to give it gas to hold an idle then after i hold the gas for a few...It will idle ok in Park...What can causing this I heard speed density cars dont idle so well with superchargers is that why im having this problem?...Any help woulod be great.....