Hi ppl, just fitted myself a fuel pressure gauge to my 1.8 EFI ZVH after suspecting for some time the fuel pressure was wrong.
With reference pipe disconnected it reads about 3.5 bar. Am I right in assuming it should be 3bar as that's what the injectors (701s) are flow rated at?

Now about a week ago I noticed the car felt quite a bit quicker than usual, on popping the bonnet I could see fuel leaking out of the pressure reg. adjustment screw.

This was because it was nearly fully unscrewed, ie leaving me no room at all to lower the pressure any further.

Is it possible the regulator's gone faulty?

Surely it doesn't matter what fuel delivery pressure is from the pump (walbro 255l/h), just that the regulator does it's job?

Any ideas welcomed......as are any offers of a free working regulator... hehe.

Thanks, Karl.