Ajustable fuel pressure regulator

[4.5 Cerbera]

Has anyone fitted an ajustable fuel pressure regulator to a 4.5 to see if it helps with the 2000rpm flatspot?

[GreenV8S]

4.5 Cerbera said:

Has anyone fitted an ajustable fuel pressure regulator to a 4.5 to see if it helps with the 2000rpm flatspot?

Adjustable fuel pressure regulator: it has one right setting and in infinite number of wrong ones. How is this an improvement?

[4.5 Cerbera]

I was thinking that my car may be running a bit lean now cos of the sports ex and de cat and wondering if anyone had used one?

[satman]

The cure for rich/lean running...espcially around the 1000-2500 rpm range is down to the crap mapping on the factory ecu's. To improve upon this you'll need to go down the route of a remap setup such as the Emerald...Im sure that fuel pressure will have very little to do with your problem.

[dannylt]

Right, even if you fix the 2000rpm flat spot, you'll ruin it everywhere else. Remapping will help, but the AJP is not the happiest engine below 3000rpm anyway.