Intermittin Engine Stall Engine No StartMissfire MISFIRE IN motor cylinder is more likely the cause to engine stall and hard start.You will have to fix this problem first, A misfire, most the time, is caused by, incorrect cylinder firing order (diagram at bottom). Or no or low cylinder compressionno or low compression is the result of A Vacumm leak.If the timing chain was recently replaced, the valve cover had to be removed, the valve cover gasket could cause a huge vacumm leak which would effect some if not all 6 cylinders,SymptomsLack/loss of power Hard start Engine hesitationFor Now check firing order( coil pack to sparkplug)check sparkplugsNISSAN 3.5 V-6 FIRING ORDERSPARK PLUG GAP 0.050'' SPARK PLUG TORQUECOIL PACK LAYOUT
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