fuel pump question.

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01-30-2009, 12:24 PM

#21

steelybuns

2nd Gear Member

Thread Starter

Join Date: Jun 2007

Location: Saint Cloud,Fl

Posts: 228

what exactly is the difference between 97 and 98? 99+ is returnless. is it just the way the pump fits in the tank? this has me a little confused lol.

01-30-2009, 12:46 PM

#22

lizzyfan

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Join Date: Jan 2006

Location: Helaware

Posts: 20,273

See previous post!

01-30-2009, 02:41 PM

#23

steelybuns

2nd Gear Member

Thread Starter

Join Date: Jun 2007

Location: Saint Cloud,Fl

Posts: 228

Quote:

Originally Posted by lizzyfan

The above "Gerotor' pumps will not last very long as the 98 pump is a return style but not like the 86-97 gerotor as it's a turbine like the returnless style 99+ that it has a varied voltage that will kill a gerotor pump. Your best bet is to keep the stocker and add an inline pump if going forced induction. If you modify the basket on a 98 tank you will cause fuel starvation below a half tank which will cause a lean condition and you'll be sweeping the streets if you get my drift. When I went with F/I I got a tank, regulator, and filler neck from a 97 and I'm good to go!

So the voltage varies in the 98? does that mean the fuel flow changes to meet demand? because with my problem I could guess the module that controls that is whats bad and not the pump itself.

I dont know if i ever stated the exact problem or not but when its under load it seems to be starving for fuel. I also have to prime it every time i start it so i just figure if the pump is losing pressure than its a pump problem. Once it starts it fine until I floor it and it sputters.

01-30-2009, 02:56 PM

#24

lizzyfan

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Join Date: Jan 2006

Location: Helaware

Posts: 20,273

If you have the stocker still you should have no problems in reference to the voltage, just sounds like a bad pump

01-30-2009, 03:43 PM

#25

GTtony

1st Gear Member

Join Date: Oct 2008

Location: CA

Posts: 120

Hijack.......
sory i did'nt fell like starting a new thread. I'll try to make this short.
I had the 03 stang jacked up from the rear so i could run my nitrous line. when i was done i lowered the car, replaced the negative bat cable and fired her up! the low fuel light came on (b4 had 1/8th tank) i let it warm up and shut it down. then i waited in koeo 4 a min held the tach button and went koer. my SES light is now on and i have a p9204 code. FUEL SHORT TO GROUND. WTF.... now my car won't start and my fuel guage stays dead empty? ANY clues how to fix this on the CHEAP.