99-04 Gt Fuel Pump - Mustang Evolution

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Old 04-27-2012, 09:12 PM   #1
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Exclamation 99-04 Gt Fuel Pump

Ok first off, My car was sputtering really bad, I figured the fuel filter might be clogged so I bought a new one and put it in. Well now it's still sputtering, and getting worse. Im guessing it might be the pump, I found a pump on ebay and I'm not too sure about it.

Here's a link, let me know what you guys think.
255LPH HIGH PRESSURE FUEL PUMP+1-140 PSI ADJUSTABLE BLUE REGULATOR+GAUGE/GAUGES | eBay

The pump's at Autozone are around $120, and only about $40 for just the pump on ebay. So obviously I'll be buying from ebay.

But if anyone else has any bright ideas as to what the problem could be if not the pump. I'm all ears.

Thanks guys.
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Old 04-28-2012, 12:24 AM   #2
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Have you checked your spark plugs?
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Old 04-28-2012, 01:23 AM   #3
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Re: 99-04 Gt Fuel Pump

The plugs are brand new, they have maybe $5k miles on them since the engine was rebuilt. I'll check them tomorrow though, I didn't think about that lol

Do you think they would already be bad with so little miles on them?
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Old 04-28-2012, 04:37 AM   #4
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Could have a bad plug, could be a bad coil, pump, fuel lines could be clogged, injectors, o2 sensors. I think you get the point. It can be really anything on the car.
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Old 04-28-2012, 10:21 AM   #5
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Quote:
Originally Posted by t0t4lbl4ck0ut
Could have a bad plug, could be a bad coil, pump, fuel lines could be clogged, injectors, o2 sensors. I think you get the point. It can be really anything on the car.
I agree needto check stuff one thing at a time to rule it out before I would condemn the fuel pump I would check you fuel pressure first
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Old 04-28-2012, 11:43 AM   #6
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Most likely a coil pack
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Old 04-30-2012, 10:09 PM   #7
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Re: 99-04 Gt Fuel Pump

Ok, so this is what I have done so far. I bought and installed a new fuel filter, removed all plugs and gaped them all again to 54. I tried unplugging the coil packs while to the car idled to see which one would make it bogg down the most and they all sounded the same when I individually unplugged them. How else can I check coil packs? And what else can I check? I'm debating on just taking it to Meinekee because they offer a free diagnosis.

What do you guys think?
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Old 04-30-2012, 10:27 PM   #8
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That might be what I'd do at that point lol

---------- Post added at 03:27 AM ---------- Previous post was at 03:26 AM ----------

You can take the coils and test the ohm resistance
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Old 04-30-2012, 10:37 PM   #9
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Re: 99-04 Gt Fuel Pump

How do I do that?
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Old 04-30-2012, 10:39 PM   #10
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With a multimeter or ohm meter. If you take them to auto zone or most auto parts stores they should be able to help you
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Old 04-30-2012, 11:46 PM   #11
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Re: 99-04 Gt Fuel Pump

idk if this will help you or not but it was an issue that i had for a while.. when take the pump out u might want to check the inside of your tank.. mine got water in it and rested the inside of my tank so i had to replace it. might be worth looking into at least.
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Old 05-01-2012, 08:44 AM   #12
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This is just a idea but if your check engine light ain't on then your coils and all that should be good. But I believe if it's a fuel problem then your check engine light won't come on but I'm not 100% sure tho
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Old 05-01-2012, 10:27 AM   #13
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That's false I've had 5 coils go bad only 1 threw a code

---------- Post added at 09:27 AM ---------- Previous post was at 09:25 AM ----------

Just buy one coil install it on the first cyl drive it for 5-10 mins see if it makes a difference if not start working your way around each cyl to u find your problem
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Old 05-01-2012, 10:46 AM   #14
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Thsts y I said I'm not 100% sure. But that's how the 86-95 mustangs r. My bad
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