Vacuum pipe from throttle body to fuel rail

1. Gaz_5103 L-plater Joined: Mar 2010 Newtownabbey, Co Antrim Posts: 95 Focus ST-3 Saxo VTS Race Car

   #1 27th March 2011, 19:40

   Does anybody know what this is for? I've a throttle body that the connector is broke off and want to know If it can be done away with.
2. kyle4256 Established Member Joined: Feb 2008 dundee Posts: 1844 saxo vts

   #2 27th March 2011, 20:43

   got a pic of it mate ?
3. Gaz_5103 L-plater Joined: Mar 2010 Newtownabbey, Co Antrim Posts: 95 Focus ST-3 Saxo VTS Race Car

   #3 28th March 2011, 13:29

   I don't unfortunately. It's a small pipe that connects to plastic throttle body and runs to a valve on the end of the fuel rail.
4. Saxovch22 Established Member Joined: Feb 2011 Scotland Posts: 1191 02 Saxo Vts

   #4 28th March 2011, 15:17

   I thought that was the fuel feed for the rail ?
5. iSlayeR Established Member Joined: Aug 2009 King's lynn Posts: 2073 Turbocharged vtr

   #5 28th March 2011, 15:21

   There's only 3 things that will connect to the fuel rail, the fuel feed, a fuel return, and a fpr ( fuel pressure regulator)
6. James-sax Infrequent Poster Joined: Nov 2010 Sunderland Posts: 135 Gti black, cammed, remapped, slammed, stripped

   #6 28th March 2011, 16:07

   get some pics up mate, might help
7. James-sax Infrequent Poster Joined: Nov 2010 Sunderland Posts: 135 Gti black, cammed, remapped, slammed, stripped

   #7 28th March 2011, 16:07

   infact it will help lol
8. Steffrallye Established Member Joined: Aug 2008 Bodelwyddan , N.Wales Posts: 1252 Peugeot S2 106 GTi 1.6 16v

   #8 28th March 2011, 16:18

   its the pipe from the FPR, its just for excess fuel to be drawn in to the inlet and burnt.
9. Gaz_5103 L-plater Joined: Mar 2010 Newtownabbey, Co Antrim Posts: 95 Focus ST-3 Saxo VTS Race Car

   #9 28th March 2011, 18:49

   Quote:

   Originally Posted by Steffrallye its the pipe from the FPR, its just for excess fuel to be drawn in to the inlet and burnt.

   Can I do away with it?
10. tom_lloyd_4 Regular Poster Joined: Nov 2010 alton hampshire Posts: 348 97 mk1 vtr 85 LR 90

    #10 28th March 2011, 19:39

    its nothing to do with excess fuel it alows the fpr to regulate the fuel pressure in Relation to the engine speed/ load so in other words no you cant do away with it but there are other pipes you could T into and block up the hole in the tb where it was befor take a pick and will be able to give more accurate advice
    hope this helps tom
11. Gaz_5103 L-plater Joined: Mar 2010 Newtownabbey, Co Antrim Posts: 95 Focus ST-3 Saxo VTS Race Car

    #11 28th March 2011, 19:50

    Quote:

    Originally Posted by tom_lloyd_4 its nothing to do with excess fuel it alows the fpr to regulate the fuel pressure in Relation to the engine speed/ load so in other words no you cant do away with it but there are other pipes you could T into and block up the hole in the tb where it was befor take a pick and will be able to give more accurate advice hope this helps tom

    Thanks Tom great idea t'ing into another pipe.
12. Steffrallye Established Member Joined: Aug 2008 Bodelwyddan , N.Wales Posts: 1252 Peugeot S2 106 GTi 1.6 16v

    #12 28th March 2011, 21:10

    Quote:

    Originally Posted by tom_lloyd_4 its nothing to do with excess fuel it alows the fpr to regulate the fuel pressure in Relation to the engine speed/ load so in other words no you cant do away with it but there are other pipes you could T into and block up the hole in the tb where it was befor take a pick and will be able to give more accurate advice hope this helps tom

    funny that since i dont have mine connected to the inlet and i know a few others that dont.
13. James-sax Infrequent Poster Joined: Nov 2010 Sunderland Posts: 135 Gti black, cammed, remapped, slammed, stripped

    #13 29th March 2011, 12:37

    get some pictures up mate, people getting confused lol
14. Steffrallye Established Member Joined: Aug 2008 Bodelwyddan , N.Wales Posts: 1252 Peugeot S2 106 GTi 1.6 16v

    #14 29th March 2011, 14:16

    just disconnect it, and see if you have any problems, just make sure u block the hole in the inlet, ive just ran a pipe from the FPR down the back of the engine on the quiky, and will be the same on the GTI. I didnt mean to use the word excess, as excess fuel is delt with by the fuel return.
    
    I remember lewis doesnt have his connected too, so ill use his pics lol
    
    FPR with blue pipe
    
    
    Ends here, left of pic
    
    
    The FPR is there to maintain a constant pressure in the fuel rail/fuel lines, it DOESNT! increase or decrease with the engines needs,all tho i do believe it lowers the pressure at idel, but not 100% on this. its just a pressure valve, sometimes a little fuel gets past and is expelled to be burnt through the inlet, having the pipe disconnected means the fuel will just dip out the line to the floor. Just remember to block the pipe/hole in the inlet