Fuel pressure

[cjspindler]

Hi,

I'm still having problems with a misfire on my Williams.

I've just put a gauge on the adjustable fuel pressure regulator to see it there is fluctuation in pressure, and identify a problem.

The pressure is as stable as anything, and is set to 3bar.

However, should the pressure change with revs? At the moment the pressure stays constant with revs, which i am not sure if this is correct or not.

I welcome any comments on this, as I still want to get to the bottom of this.

Thanks

[cjspindler]

I've now changed the vacuum hose going to the AFPR, as the old one was split at both ends.

I'm now getting a high pitched hiss noise when i rev the car.

Could this be the sign of a split diaphragm on the AFPR?

The car certainly drives better now the hose has changed, but is still misfiring.

Any help would be much appreciated.