Another GTV6 won't start issue

[aggie57]

Alby - it will be the lower idle speed that stopped the hunting. It's really a simple system: above 1300 rpm with the throttle closed, ECU keeps injectors closed; below 1300 rpm with the throttle closed, injectors operate normally.

The idle bypass is like a mini throttle, bypassing the butterfly. So open it too much, revs rise above 1300 but because the throttle is closed, ECU shuts down injectors, revs drop below 1300, ECU operates injectors, revs start to rise, go above 1300 rpm, ECU shuts down injectors, and so on.

[Albygtv]

Hey Alistair. Thank you, that explains it perfectly & makes excellent sense to me. I'm actually starting to like this fuel injection set-up now that I'm understanding it more & more.

Thought I might do some more work on it today, but went for a short drive & then kept finding reasons to go a bit further. Ended up about 3 hours, hugely enjoyable & everything working really well. Boy these engines are magical - the sound & responsiveness just make me want to keep driving all the time. I love this car.
Cheers