Is fuel open-loop at idle? (VP 304)

[Circlotron]

Righto, finally got to the bottom of things, so it seems. The other week I had several o-rings start to leak where the injectors go into the fuel rails. For the time being I have removed and plugged the supply and return hoses to the rails. Now, unexpectedly, on gas it idles better than it ever has! Must have had one or more injectors leaking a little when meant to be closed, letting fuel in because of residual pressure.

[Circlotron]

when you start it up cold on petrol it idles just fine.

The other day I found that the water temp sensor wire (ECU, not gauge) had fallen off. Duhh...

[Holden202T]

nice! tghats going to change fuelling somewhat

i had a mates car a while back having the CTS wires touching together intermitantly, rich lean rich lean rich lean! was going from 90 degrees C fueling to -40 degrees C!