NO SPARK, any ideas??

[stuG40]

any ideas? My G40 has being running fine after a recent rebuild + K03 turbo conversion. A few days ago the car just died, turned out to be no spark. carried out all the usual new coil, rotor ,hall sensor ect

when I put a HT lead straight onto the coil pack and turn the ignition on I get a single spark, then when I crank no spark.

I'm thinking ECU or loom? also I checkED the alarm and disabled the immobiliser, any idea??

thanks in advance   

[GR40]

Check fuses! What immobilizer?

[stuG40]

I checked all the fuses and relays

[kwijibo_coupe]

I'd be checking wiring first. Did you have the loom out to check during the rebuild?

Also check the engine earths too.

[ereeiz]

Replace your earths if they're old. They cause 1001 issues. Even if it looks fine, for the sake or about £3 you may as well change them.

[stuG40]

for the interest of the forum... turned out to be the blue coolant temp sensor, advancing the ignition to 127 degrees and reading -40. thanks

[JoeH]

blue temp sensors are a common fault - they all fail eventually - just search this forum, and imo are worth replacing from time to time for that reason