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Discussion Starter · #1 ·
I have just fitted a a Bosch 044 fuel pump to my r33 GTR and now have a horrible flat spot at low revs, then the car suddenly takes off. Does anybody have an idea what could be causing this? I think it may be something to do with the variable voltage to the pump which I believe is standard on the GTR:confused:
 

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i thought the voltage was only cut at idle too keep the pump noise down and prolong the life of the pump
 

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Discussion Starter · #3 ·
There was no flat spot using the standard pump. The flat spot changes to full power occurs at about 4000 revs.:confused:
 
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