328 won't start

Hi Bradley ,

Common culprits (assuming good mechanical engine condition): air, spark fuel.

Air is unlikely, unless the CIS airflow sensor plate is sticking. You can remove the airbox top and push down to confirm it's free.

Spark is most common. Put a timing light on the #1 plug wire to confirm spark when cranking. If present, check #5 to confirm present on both banks. If either is not firing, check the others on that bank, then coil wires, then rotors/caps. If you remove a wire, cut the end and reseat in the cap. The plug extenders are also notorious for arcing, but I expect that would cause poor running & not prevent starting. There are also two flywheel sensors on the 328, one for TDC and the other for tach/advance.

Fuel pumps can fail; pull the "safety plug" blue connector at CIS fuel meter & turn key to run position; you should hear the fuel pump. After turning the engine over, you can pull a spark plug to verify fuel present in cylinder. There's also a "FI protection relay" on the Bosch ECU plate in the right rear that has a 10A fuse; again, this usually causes very poor running but perhaps could prevent starting. Fuel pressure testing requires a CIS fuel pressure tester kit.

There are other possibilities, but these are good places to start. Most 328 "no-start" conditions are electrical/ignition in nature.

Best,

Carl

 

Just had a similar problem with my car. I know from past experience that the relays are getting tired now. Checked the fuses-all ok,pulled the relay from the fuel pump and swapped it with the a/c relay(same bosch relay)...fired first time.relays are £11 from ferrari uk or a lot cheaper from a bosch parts dealer. I would definitley check your relays first!

 

Do you hear the clicking of the fuel pump?