I just got finished upgrading my fuel pump and FPR. At Idle with the vacuum hose connected to the FPR, I get 32psi (2.2bar). At idle without the vacuum hose connected, I get 40psi (2.8bar).

You can try to run more than stock fuel pressure but your PCM will eventually "learn" what is going on and reduce your injector pulse width to compensate.

If your Mondeo is running lean, you really need to get a chip and have it dyno tuned to properly fix the problem.


HTH,
BP

Ben ---'96 Contour GL * Zetec ATX * Tan on Black steelies--- +++JRSC M62 Under Construction+++ My big-a$$ mod list.