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How big of a fuel pump to go?

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Old 09-21-2006, 03:34 PM
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grumpyphillips
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Default How big of a fuel pump to go?

Complete newbie here. I have a stock 1990 5.0 convert except for a cold air intake, an 80mm MAS, and Ford Racing High-flow 19lb injectors. My fuel pump quit working and now I need to get a new one but I'm not sure which brand to go with or what size to get. In the next 6-8 months, I was planning on installing a Cobra Upper and Lower intake.

Thanks for the help.
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Old 09-21-2006, 03:39 PM
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88BlueGT
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Default RE: How big of a fuel pump to go?

Why such a big MAF?

Anyway, a 190 would be fine.
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Old 09-21-2006, 03:41 PM
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bouchermb
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Default RE: How big of a fuel pump to go?

I was wondering the same thing.
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Old 09-21-2006, 03:42 PM
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PX429
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Default RE: How big of a fuel pump to go?

How do you know it's your fuel pump?
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Old 09-21-2006, 03:44 PM
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ikeybmg
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Default RE: How big of a fuel pump to go?

I say 190 also. But 80mm maf is huge!
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Old 09-21-2006, 03:48 PM
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grumpyphillips
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Default RE: How big of a fuel pump to go?

I told my mechanic that I was planning on installing the Cobra Intake and he suggested the 80mm MAF. Is he wrong about that? I think its the fuel pump b/c when I start the car the RPMs wont go past 500 and the fuel pump is really really loud and there is a popping sound and then the car dies out.

Do youguys think it is something besides the fuel pump? I haven't checked the fuel reply yet. Also, would I be better off going with an inline fuel pump instead of an intank one?
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Old 09-21-2006, 03:49 PM
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PX429
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Default RE: How big of a fuel pump to go?


ORIGINAL: grumpyphillips

I told my mechanic that I was planning on installing the Cobra Intake and he suggested the 80mm MAF. Is he wrong about that? I think its the fuel pump b/c when I start the car the RPMs wont go past 500 and the fuel pump is really really loud and there is a popping sound and then the car dies out.

Do youguys think it is something besides the fuel pump? I haven't checked the fuel reply yet. Also, would I be better off going with an inline fuel pump instead of an intank one?

No stay with the intank. And when is the last time you changed your fuel filter?
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Old 09-21-2006, 03:51 PM
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grumpyphillips
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Default RE: How big of a fuel pump to go?

I changed the fuel filter about 5 months ago but the car did sit for about 2.5 weeks with only 1/8 - 1/4 of fuel in the tank.
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Old 09-21-2006, 03:53 PM
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ikeybmg
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Default RE: How big of a fuel pump to go?

You'll prolly want a 65mm TB. I wouldnt go higher than that. You dont a anything bigger than 73-75mm on the maf. I dont guess the 80 will hurt it though.
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Old 09-21-2006, 03:55 PM
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grumpyphillips
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Default RE: How big of a fuel pump to go?

People have asked if I have a cam in it b/c of how it is lobing. It sounds like it has a cam but it just idles rough. Could that be b/c of the 80 MAF?
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