GavinsBeard Posted June 5, 2015 Share Posted June 5, 2015 probably seems like a stupid question to most but what does a fuel pressure regulator actually do and is it worth putting one on the 4EFE? Quote Link to post Share on other sites
Gainzy Posted June 5, 2015 Share Posted June 5, 2015 The short answer is you don't need one mappers use it to fine tune the pressure of your fuel when running high boost so I've read and heard but the ecu controls the lot the whole point in getting a map is to control timings and fuel etc so I never bothered with one stock fpr on the fte's can cope to 250++ if I was going massive turbo changing injectors that's the only time I'd buy one...SARD or fuel lab. Quote Link to post Share on other sites
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