cuzzy New Member 12 Member For: 9y 9m 22d Gender: Male Location: Melbourne Posted 01/05/16 09:40 AM Share Posted 01/05/16 09:40 AM Hi all. I recently installed a walbro intake pump 400lph and new plastic fuel hoses. Also hi flowed the turbo. Do I have to replace the fuel pressure regulator as it's been tuned thou im having issues with the idle and stalling issues. Its very intermittent and revs drop under 500 if I come to a quick stop at the lights. I'm going back to look at the tune again never done this when it was at 300rwkw with stock fuel pump. Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,302 Member For: 16y 13d Gender: Male Location: Melbourne Posted 01/05/16 10:07 AM Share Posted 01/05/16 10:07 AM Nope. Stock reg would be fine. Looking at the tune sounds like your best bet. Good luck in getting it sorted at the tuner. Link to comment Share on other sites More sharing options...
bamk2f6tornado Bronze Donating Members 777 Member For: 10y 4m 20d Gender: Male Location: Rockhampton Qld Posted 01/05/16 10:10 AM Share Posted 01/05/16 10:10 AM You can have problems with high fuel pressure at idle with a walbro that large. As the reg physicaly can't return the fuel quick enough to maintain the 4bar base pressure and it will start to creep up and run rich. I had high fuel pressure issues in my Ute with that same pump and drilled out the standard reg. You can also buy a Bosch high flow unit fairly cheap. The stock return hole is quite small. stock vs Bosch high flow This is mine after I drilled it out. I didn't measure the drop in pressure but I noticed an immediate improvement in idle and so longer smelt rich. Link to comment Share on other sites More sharing options...
cuzzy New Member 12 Member For: 9y 9m 22d Gender: Male Location: Melbourne Posted 01/05/16 10:25 AM Author Share Posted 01/05/16 10:25 AM Thanks for that info Bamk2f6tornado. I really think this fuel regulator is playing havoc as my tuner hasn't seen this issue before. I'll hunt around for a high pressure fuel reg Bosch type. I think only KPM sell them.. Correct me if I'm wrong. Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 18y 7m Gender: Male Location: Perth Posted 01/05/16 10:41 AM Share Posted 01/05/16 10:41 AM Credit to ihatetoads for the side buy side pic.he sent it to me and I sent it to Alex. 2 Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,751 Member For: 12y 9m 2d Posted 01/05/16 12:04 PM Share Posted 01/05/16 12:04 PM Fairly certain I put a 1/8th drill in my turbo smart return port. Link to comment Share on other sites More sharing options...
cuzzy New Member 12 Member For: 9y 9m 22d Gender: Male Location: Melbourne Posted 02/05/16 11:31 AM Author Share Posted 02/05/16 11:31 AM I purchased a high flow fuel regulator from Herrod today. Fitted it up still has fueling issues but yet to recheck the tune. This will happen this week. Link to comment Share on other sites More sharing options...
sm13f6 Member 34 Member For: 9y 1m 8d Posted 26/07/17 09:03 PM Share Posted 26/07/17 09:03 PM On 5/1/2016 at 8:10 PM, bamk2f6tornado said: You can have problems with high fuel pressure at idle with a walbro that large. As the reg physicaly can't return the fuel quick enough to maintain the 4bar base pressure and it will start to creep up and run rich. I had high fuel pressure issues in my Ute with that same pump and drilled out the standard reg. You can also buy a Bosch high flow unit fairly cheap. The stock return hole is quite small. stock vs Bosch high flow This is mine after I drilled it out. I didn't measure the drop in pressure but I noticed an immediate improvement in idle and so longer smelt rich. do you happen to know the part number for the bosch high flow unit mate ? Link to comment Share on other sites More sharing options...
bamk2f6tornado Bronze Donating Members 777 Member For: 10y 4m 20d Gender: Male Location: Rockhampton Qld Posted 26/07/17 09:23 PM Share Posted 26/07/17 09:23 PM Not a bloody clue mate Link to comment Share on other sites More sharing options...
sm13f6 Member 34 Member For: 9y 1m 8d Posted 26/07/17 09:28 PM Share Posted 26/07/17 09:28 PM haha all good mate cheers Link to comment Share on other sites More sharing options...
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