[928uk] No start!

[Paul R Smith]

If you have sparks, the CPS is working.
Note that the fuel pump will only run while the engine is rotating.
Starts then dies does sound like lack of fuel.
Check for flow at the return to the tank, that way the pump is working 
against pressure, but the flow you are observing isn't under pressure.

Smiffy

On 16/06/2024 18:21, Adrian Langford via 928uk wrote:

To my embarrassment I’m the last car at Leamington’s cars in the spa event. Lots of nice compliments but when I wanted to leave she failed to start! Turns over healthily but not firing.

Grounded plug and there is spark. Jumpered pump which runs, engine then starts but then dies. Also changed ignition and injection relays but no difference.

I’ve arranged recovery but wonder if it’s a CPS problem given the pump doesn’t seem to be getting signal to run unless jumpered? I did change it for a new one as preventive maintenance a few years ago but perhaps it’s failed. Can’t test it properly till home and now waiting to be recovered, but if I’ve missed anything obvious please say!

Adrian
MY91 S4 Auto