so basically I bought a 2004 mk1 xr6 turbo from a dealer two days ago. it has been majorly serviced 10,000kms ago and has new coil packs and new spark plugs (week old) in drive when the engine is warm it idles very low and the car shakes and sometimes comes to a stall. I put it back in neutral and it starts up with a low idle again. any ideas what causes this/steps to take? also with my footdown it sometimes backfires, pretty standard thing but is this a issue? pretty pissed off as when we test drove it and stuff it idled a lil lumpy but then was fine with fresh fuel but now I feel like ive bought a bag of sh*te.