phil 01 Posted September 6, 2015 Share Posted September 6, 2015 R300 1800cc K Series fuel pressure regulator on a injected engine, there looks as there should be a maybe a small plastic hose fitted, if so where does the other end go to thanks phil Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted September 6, 2015 Area Representative Share Posted September 6, 2015 PhilAssuming it's the small black pressed steel regulator, then the tiny black spout on top doesn't have anything fitted (I know - it looks like it should). Link to comment Share on other sites More sharing options...
oilyhands Posted September 6, 2015 Share Posted September 6, 2015 On engine with a plenum, it is attached to the plenum via a spout, this then references the fuel pressure against manifold pressure rather than ambient atmospheric to give a consistent 3 bar across the system.On TB equipped cars it is left open to the atmosphere.Oily Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted September 6, 2015 Area Representative Share Posted September 6, 2015 Ah. Thanks Oily. My car is on TBs hence my response. Link to comment Share on other sites More sharing options...
phil 01 Posted September 7, 2015 Author Share Posted September 7, 2015 Thanks Paul and Oilyphil Link to comment Share on other sites More sharing options...
TomB Posted September 7, 2015 Share Posted September 7, 2015 Do FPR decline with age? Ive been in recent email discussion with Oily about the 10-15 horses that are missing from my 1.8k, so am thinking of replacing some or all of the fuel pump, regulator & fuel filter perhap cleaning the injectors, ahead of a remap to hopefully find the errant horses. My fuel system is original 1996 vintage, expect for the new 1.8 injectors. Link to comment Share on other sites More sharing options...
OliverSedlacek Posted September 7, 2015 Share Posted September 7, 2015 Nothing lasts forever! Before changing the regulator I would see if I could get the rail pressure checked, as it will be much more informative that 'diagnosis by substitution'. Link to comment Share on other sites More sharing options...
TomB Posted September 7, 2015 Share Posted September 7, 2015 Any idea how Id do that? Link to comment Share on other sites More sharing options...
OliverSedlacek Posted September 7, 2015 Share Posted September 7, 2015 http://www.ebay.co.uk/itm/like/171906237674?adgroupid=&hlpht=true&hlpv=2&rlsatarget=&adtype=pla&ff3=1&lpid=122&poi=&ul_noapp=true&limghlpsr=true&ff19=0&device=c&chn=ps&campaignid=&crdt=0&ff12=67&ff11=ICEP3.0.0-L&ff14=122&viphx=1&ops=true&ff13=80 Link to comment Share on other sites More sharing options...
TomB Posted September 7, 2015 Share Posted September 7, 2015 Thanks Oliver, looks a low cost way to look at fuel pressure.I guess I would take off the hose on the fuel rail next to the FPR which is I presume the high pressure end, put a short length of rubber hose on the fuel rail, put in the T piece and connect the original fuel hose to the rail, to the other side of the T piece. Into the T piece goes the gauge, some PTFE tape here and there, some jubilee clips, then start the engine. What fuel pressure should I see? Does the FPR regulate the flow such that if >3bar it vents out? Link to comment Share on other sites More sharing options...
OliverSedlacek Posted September 8, 2015 Share Posted September 8, 2015 With the proviso that I don't know about your specific engine, a fuel pressure regulator usually works by spilling fuel once the control pressure level has been reached. The excess is returned to the tank (or a swirl pot in some installations). 3 bar or 44 PSI above atmosphere is a common setting. Link to comment Share on other sites More sharing options...
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