adams355 Member 529 Member For: 7y 8m 14d Gender: Male Location: Brisbane Posted 18/09/18 09:40 PM Share Posted 18/09/18 09:40 PM (edited) But I have the same symptoms even with the aftermarket pump. Apparently, the high pressure pumps don't have a relief valve only the early walbro pumps. Well, the AEM doesn't and that's what I have. Cheers Edited 18/09/18 09:47 PM by adams355 Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 2m 19d Gender: Male Location: Perth Posted 18/09/18 10:07 PM Share Posted 18/09/18 10:07 PM I think you are confused. The mod they are talking about raises fuel pressure by not bleeding it off. A good aftermarket pump solves this issue. What issues do you have? Link to comment Share on other sites More sharing options...
adams355 Member 529 Member For: 7y 8m 14d Gender: Male Location: Brisbane Posted 19/09/18 12:29 AM Share Posted 19/09/18 12:29 AM surge and lean out Link to comment Share on other sites More sharing options...
Puffwagon Trust me bro... Gold Donating Members 16,057 Member For: 9y 11m 17d Gender: Male Location: South Australia Posted 19/09/18 12:33 AM Share Posted 19/09/18 12:33 AM Check your fuel filter and make sure you have more than half a tank of fuel in it. 1 Link to comment Share on other sites More sharing options...
adams355 Member 529 Member For: 7y 8m 14d Gender: Male Location: Brisbane Posted 19/09/18 12:46 AM Share Posted 19/09/18 12:46 AM Yea filter is clean. Isn't it the same issue though. I want to keep the pressure in the line, if the relief vents it will drop the pressure in fuel line. What do KPM modify in there in tanks. Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 2m 19d Gender: Male Location: Perth Posted 19/09/18 02:38 AM Share Posted 19/09/18 02:38 AM (edited) Are you getting confused with enlarging the return outlet. That needs to be done when you have a high flow pump. What setup do you have? What intank pump? What pot? External surge and pump? What fuel do you run? Edited 19/09/18 02:39 AM by arronm Link to comment Share on other sites More sharing options...
Puffwagon Trust me bro... Gold Donating Members 16,057 Member For: 9y 11m 17d Gender: Male Location: South Australia Posted 19/09/18 02:47 AM Share Posted 19/09/18 02:47 AM I had supply issues when I swapped my 460 in but resolved it with some strategic drilling and other farkery. 1 Link to comment Share on other sites More sharing options...
adams355 Member 529 Member For: 7y 8m 14d Gender: Male Location: Brisbane Posted 23/09/18 03:45 AM Share Posted 23/09/18 03:45 AM Ok I have a good one, removed pump assembly, took out the relief valve, still surging (has AEM E85 340LPH pump but only running 98 atm)... It was starting to be ridiculous so I thought unless my pump has been removed before maybe ford got it wrong. Check return line oh no fuel. Check vent line oh wow some fuel. Check ford diagram fuel pump assembly (below) mine is not like that its different unless its changed for some reason. My return runs back under vent line and continues across. Anyway, hooked it up, NO surge way under a quarter, only has relief valve taken out (standard pot). If you are getting surge I would be checking that line. Mine also drove fine hooked up the wrong way until I got low on fuel 1/4 etc because it was retuning through the tiny vent. https://goo.gl/images/FxY5xW Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 2m 19d Gender: Male Location: Perth Posted 23/09/18 05:11 AM Share Posted 23/09/18 05:11 AM What actually happened was, whoever reconnected the quick connect at the pot connected them wrong, simple mistake, that's why it pays to mark things. Link to comment Share on other sites More sharing options...
adams355 Member 529 Member For: 7y 8m 14d Gender: Male Location: Brisbane Posted 23/09/18 05:19 AM Share Posted 23/09/18 05:19 AM (edited) The return runs back under the vent pipe which isn't the correct way according to the manual. The issue was happening with the stock pump before it was removed by me anyway. Edited 23/09/18 05:21 AM by adams355 Link to comment Share on other sites More sharing options...
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