99auxr New Member 8 Member For: 10y 10m 5d Posted 29/03/15 07:15 AM Share Posted 29/03/15 07:15 AM I have a standard intank fuel pump, plazmaman surge tank with single 044 feeding a plazmaman fuel rail with an FPR1200.I see people talking about a venturi and a check valve in the intank pump assembly and modifying it. What does this achieve and do these need to be modified?Also on start up the car takes a while to start I assume this is because the 044 has no check vavle so fuel drains out of rail? What is the part I need to buy to fix this, do speedflow do something?Any help is appreciated. Link to comment Share on other sites More sharing options...
FiftyOne Bronze Donating Members 1,145 Member For: 10y 9m 25d Gender: Male Posted 29/03/15 09:09 AM Share Posted 29/03/15 09:09 AM The venturi is an issue. Not sure about the check valve. The far better option is an intank replacement anyway. (KPM do really good replacement units) 1 Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,751 Member For: 12y 9m 6d Posted 29/03/15 10:41 AM Share Posted 29/03/15 10:41 AM I have a standard intank fuel pump, plazmaman surge tank with single 044 feeding a plazmaman fuel rail with an FPR1200.I see people talking about a venturi and a check valve in the intank pump assembly and modifying it. What does this achieve and do these need to be modified?Also on start up the car takes a while to start I assume this is because the 044 has no check vavle so fuel drains out of rail? What is the part I need to buy to fix this, do speedflow do something?Any help is appreciated.If u can't get base pressure low enough you mod the intank return line to flow better. aka less back pressure. I'd fit the setup then see how far u can wind down the base pressure. If u get down to 3 bar then all good. If not pop the intank cradle and have a look at the path the fuel has to go and mod it a little. with the second part I have never had a major issue but there is a knack I have found that makes it start a little quicker. Basicly just as u hear the pump stop priming hit the key. If I wait afterwards it takes a few extra spins to fire. 1 Link to comment Share on other sites More sharing options...
99auxr New Member 8 Member For: 10y 10m 5d Posted 29/03/15 11:43 AM Author Share Posted 29/03/15 11:43 AM (edited) Cool thanks for replies fitted the setup last weekend and was wondering about the intank pump.I didnt have an issue getting the fuel pressure down. Went right down to FPR lowest, then sent a 58PSI.However the fuel pressure seems to randomly drop at times, was sitting in maccas drive through and wideband went to 15.5 pulled over and pressure was at ~40 PSI. No leaks was wondering if I had a bad 044 straight out the box, (was purchased through plazmaman not ebay special) Edited 29/03/15 11:45 AM by 99auxr Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 18y 7m 3d Gender: Male Location: Perth Posted 29/03/15 12:51 PM Share Posted 29/03/15 12:51 PM What fuel are you running? Bad pump/debris jamming the reg would be the obvious causes.Nb:bad pump could include poor power/earth 1 Link to comment Share on other sites More sharing options...
99auxr New Member 8 Member For: 10y 10m 5d Posted 29/03/15 01:15 PM Author Share Posted 29/03/15 01:15 PM (edited) Live in NZ and its 95 cant get any better where I live. Power feed to pump is good and earth is connected to the surge tank/sway bar mount bolt. But can go around tomorrow and check quality of supply and earth with DMM.If its debris how would I go about fixing this? More importantly how would I pinpoint the issue. I replaced fuel filter 3000km ago.Also If it helps when the car lost fuel pressure I was able to use the adjustment on the reg to bring it back up. Then after idling abit I had to reduce it when lost pressure returned as it was to high. Edited 29/03/15 01:26 PM by 99auxr Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 18y 7m 3d Gender: Male Location: Perth Posted 29/03/15 01:26 PM Share Posted 29/03/15 01:26 PM Sounds like a dicky reg. I'd suggest striping the reg and cleaning it out. For the pressure to drop and rise again suggests something blocking the reg..... Unless the fuel was extremely hot but unlikely given where you live and a single 044 doing pumping duties. Ps if you keep liking all my posts your going to make me nervous 1 Link to comment Share on other sites More sharing options...
99auxr New Member 8 Member For: 10y 10m 5d Posted 29/03/15 01:50 PM Author Share Posted 29/03/15 01:50 PM (edited) Is cleaning the FPR1200 as simple as remove inlet and out lets and using compressed air? Or strip in right down?p.s Sorry not that way inclined Edited 29/03/15 01:56 PM by 99auxr Link to comment Share on other sites More sharing options...
99auxr New Member 8 Member For: 10y 10m 5d Posted 19/04/15 07:23 AM Author Share Posted 19/04/15 07:23 AM Cleaned the reg found still had the problem ended up finding the issue lay with this http://aeromotiveinc.com/fuel-pressure-gauges-liquid-filled-vs-dry-problem-solution/ 2 Link to comment Share on other sites More sharing options...
Skids4kids in the mid....not the bum like some Member 609 Member For: 11y 3d Gender: Male Posted 19/04/15 09:10 AM Share Posted 19/04/15 09:10 AM Is the wideband faulty then also as the gauge read leaner when the pressure dropped didn't it?I take it from reading that article you suspect the heat issue in the glycerine filled gauge? Link to comment Share on other sites More sharing options...
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