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Old 19-05-2017, 18:37   #1
wha77t
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Evo 8 fuel pump help please😩

Hi guys... Really need some help and advice please.. I have a 2004 Evo 8 MR.. I went to Manchester today and on way back home I heard the famous loud whine from the fuel pump.. I found it strange as its new. And has barely covered 100 miles.. My last pump did the same at 100 miles so I got a new one and this is doing same.... As soon and I joined motorway it started spluttering and hesitating and wouldn't go over 3k revs.. Car always has a full tank and all the fuel pumps have been walbro... Any idea what it could be? Fuel pump? Relay? Battery? Thanks
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Old 19-05-2017, 20:54   #2
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Who fitted it?
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Old 19-05-2017, 21:43   #3
wha77t
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I did... But before I bought car it was spot on so I changed pump cos it started to whine and wouldn't start sometimes.. And all new pumps are doing same after 100 miles
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Old 19-05-2017, 21:47   #4
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where did you buy it from?
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Old 19-05-2017, 21:47   #5
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Also did you put the plastic collar on from the old pump on the new pump?
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Old 19-05-2017, 22:34   #6
wha77t
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Yeh put everything in.. If I had done it wrong wouldn't it have played up straight away?
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Old 19-05-2017, 22:34   #7
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You're not going to fault find it without a pressure gauge.
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Old 19-05-2017, 22:56   #8
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Originally Posted by wha77t View Post
Yeh put everything in.. If I had done it wrong wouldn't it have played up straight away?
What tends to happen if you miss that collar out is that they will drive off boost ok, though unknowingly be lean, the minute you try boost you have a lean misfire
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Old 19-05-2017, 22:57   #9
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Also if you've fitted the big black rubber spacer at bottom?
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Old 19-05-2017, 23:08   #10
wha77t
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Also if you've fitted the big black rubber spacer at bottom?
Yeh I double checked
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Old 19-05-2017, 23:09   #11
wha77t
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Could a weak battery cause it.. I don't tend to use it alot and sometimes I've had to get boost pack to start it..
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Old 20-05-2017, 07:34   #12
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Think you should start doing basic checks now like voltage to the pump and/or pressure if you have the facilities, if not get it into a specialist.
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Old 20-05-2017, 07:36   #13
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Have you checked your fuel line all the way back to the fuel rail?


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Old 20-05-2017, 14:14   #14
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Hard wire it and put a walbro 255 in and it'll do it anyway

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Old 21-05-2017, 18:08   #15
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Having the same trouble with mine at the moment... Drives fine off boost but as soon as you go to put your foot down it just coughs and farts, Very loud whine aswell

Luckily Iv got a spare standard pump in the garage, Should I be alright fitting the pump even though it's been sat around for awhile????
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