vwfreek 0 Posted October 12, 2010 Report Share Posted October 12, 2010 just wondering if anyone can help iv got a mk2 golf with a obd2 vr6 engine and iv got problems the car was running fine but iv just put a z enginering supercharger with obd1 intake manifold ecu and loom but now the fule pump dosent run all tne time only when it wants to but when it does it dosent pressure up the rail it just pumps it through the rail and back to the tank so the car wont start has any one got any idears cheers mark Link to post Share on other sites
legvw 0 Posted October 12, 2010 Report Share Posted October 12, 2010 Hello and welcome to the club.If is not pressuring the fuel rail then it sounds like the fuel pressure regulator isn't working. Link to post Share on other sites
vwfreek 0 Posted October 12, 2010 Author Report Share Posted October 12, 2010 iv replaced that Link to post Share on other sites
legvw 0 Posted October 12, 2010 Report Share Posted October 12, 2010 And the intermitant fuel pump could be the relay?Not sure about the none pressurising thing....Hopefully someone else might be able to help mate! Link to post Share on other sites
craggsy 91 Posted October 12, 2010 Report Share Posted October 12, 2010 What fuel pump you using? Link to post Share on other sites
vwfreek 0 Posted October 12, 2010 Author Report Share Posted October 12, 2010 not to sure i think its the mk3 vr6 one Link to post Share on other sites
vwfreek 0 Posted October 13, 2010 Author Report Share Posted October 13, 2010 iv replaced the relay but it dosent make any difference but if i give the relay a switch live from my power probe the pump starts working Link to post Share on other sites
legvw 0 Posted October 13, 2010 Report Share Posted October 13, 2010 So it could be the wire between ecu and the relay has a break? Link to post Share on other sites
editionmatt 1 Posted October 13, 2010 Report Share Posted October 13, 2010 can you not do a continuity test on the cable? just use a multimeter. and test between each end. Link to post Share on other sites
J5KE F 0 Posted October 13, 2010 Report Share Posted October 13, 2010 Can u not connect the pump relay switch wire to ign switch live?I had to do this on my caddy conversion.. Link to post Share on other sites
vwfreek 0 Posted October 14, 2010 Author Report Share Posted October 14, 2010 i could but it still dosent pressure up the rail thats my main problem Link to post Share on other sites
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