Had some work done on my Z, replaced the head gasket, new timing chain and guides, new oil pump, aluminum flywheel, and competition clutch. Ever since I got my car back from the shop, when ever I start it in the morning it starts fine and drives ok, but after it warms up whenever I slow down to stop, the car dies and is hard to start. Could it be the timing?

 

It could be many things. If the performance has not deteriorated & you have no check engine light on, its unlikely to be the timing more likely an air or vacuum hose not put back correctly.