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New fuel pump overfueling?

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#1
smokes

smokes

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hi all,

last week i got a walbro 255 pump put in my evo 1. Now the car is running rich, not making as much power and spitting fuel out the exhaust, backfiring etc. Should i be getting a fuel pressure regulator put in, or just increasing the boost?

cheers
Ben

#2
tharaka

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option a.


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