PLEASE HELP! This week we installed my engine after a valve job (Valves, springs, retainers). WE followed all steps by the book. After priming the engine it fired right up. It was the best the car has sounded since I've owned it. While it was idling right after warm up when the rpms were coming down the engine slowly and smoothly shut it self off. Now all it will do is crank, but won't start.

We've checked compression (good), checked spark (good), checked fuel (good) and checked timing(also good). We checked all fuses and relays.The one thing we notice is the smell of fuel when we crank for too long. I've replaced the crankshaft and camshaft position sensors also. Now I am completely LOST!!!

Mods: Invidia turbo back exhaust, cobb intake and accessport with stage 2+ tune

 

Any fault codes stored in the ECU ??
Check the earth(ground) points on the Inlet Manifold are clean and tight.
Check the fuel feed and return pipes are in the correct position.
Double check cambelt timing

 

Are the injectors ok.