Intermittent Fuel Pump Fault
New member on here.
I have a 2002 Boxster 3.2s which cuts out intermittently with no fault codes or check engine light.
Initialy won't re-start and just turns over but after 5~10mins will re-start and run fine for days before the next episode of cutting out.
Recently seems to be that if I don't wait long enough, it will fire up and run for a few seconds before dying (but waiting longer it will eventually start and run fine).
I had thought I had pinned down to the fuel pump relay having a break in the windings (fine when cold then break opening and breaking circuit when hot) which would explain the time lag before the engine will fire up again. However so far on long term (24hrs) bench test the relay has been fine and never dropped out - I have a replacement on order tho to completely rule out.
I'm still thinking along the lines of a faulty relay, but think the fuel pump could also be the culprit. Are there any other relays involved with the circuit that supplies the fuel pump?
Any thoughts or ideas would be very much appreciated.
Alan
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