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Fuel pump woes

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Old Sep 15, 2004 | 01:15 PM
  #1  
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Fuel pump woes

When I test my Fuel Pressure it gets a good reading, about 50 PSi, I forget the exact reading, but it was a good reading... BUT my fuel pressure gage has a releaf button, and when I push it the fuel just barely ozes out.. On the other cars that I have tested fuel will darned near shoot across the room when I push the button...

Could this be a sign that my pump is wearing out???

Also I am recently experiencing a really irradic idle at times, I think thats the O2 sensor tho. Could it be related???

JOhn
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Old Sep 16, 2004 | 08:57 PM
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From: Whitehouse, Ohio
Car: 1987 IROCZ
Engine: 305 TPI
Transmission: 700r4
Sounds like the check valve isn't keeping the fuel pressure up after pump stops, was the pressure dropping before you pressed the relief button, cause your right, it is a fuel shower bleeding off pressure if your not careful.
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Old Sep 17, 2004 | 07:06 AM
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Thats with the car running.... It holds pretty well when off...

John
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Old Sep 17, 2004 | 07:43 AM
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From: Whitehouse, Ohio
Car: 1987 IROCZ
Engine: 305 TPI
Transmission: 700r4
Interesting, pressure but no volume? No clue.
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Old Sep 17, 2004 | 12:48 PM
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
THe car actually runs fine... Actually after all I ahve done to it I expected more... I run about a 15.0 sec flat with the following:

SLP cam SLP Part # 51002
Oversize runners (about 1/8" larger in Diameter)
I ported the Plenum, Base, and runners, & gaskets for better flow.
SLP Headers & cat back
3.73:1 axel
Aluminum Driveshaft
Trans Go (Gil Younger No Yo-Yo Shift Kit)

I dunno...

John
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Old Sep 18, 2004 | 07:05 AM
  #6  
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From: Whitehouse, Ohio
Car: 1987 IROCZ
Engine: 305 TPI
Transmission: 700r4
If you want to check one more thing, I would check for volume, test how much fuel it pumps in a given period of time, can't remember the spec, I could look it up if you want, let me know. BTW, a 305 running a 15 flat is pretty good from what I have seen. I myself have not gotten out to the track yet, next year I will do a couple of runs for kicks, just to see what my setup will do. I am not expecting any maricles either maybe a high 14. With a 305 under the hood, it is more for show than go. BTW, what MPH?
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Old Sep 20, 2004 | 12:21 PM
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
I really want to see if I can get down to 14 to mid 14's with a 305, NA, AUto...

My best time when I went the last time was 15.15 @ 92Mph.. BUT My tramsmission puked at around 80 Mph, so I had to take my foot off the gas and hit it again... not sure whats going on there ...

Right now tho I have some tranny issues, As stated above, at about 80-85 Mph the tranmission feels like it goes into neutral, I take my foot off gass and push again ind it goes...

JOhn
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