 jham0077
"2nd Year" Silver Supporting Member
Posts: 320
Age: 36
Loc: Greenville, Il.
Reg: 11-04-11
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07-23-12 07:22 AM - Post#2251140
My fuel pump has give up(last major part to replace since I bought it). Or I'm pretty sure that's whats wrong. It dies after 30 or so seconds of driving and will only restart after the key is cycled off and on. Plus the rental gauge showed pressure dropping to around 6 psi when it dies. Anyway, I am comparing pump assemblies on NAPA's site. The Delphi says it's good for 31.2 gph @ 12.1 psi and the OEM equivalent says 55-60 gph @ 40-50 psi. Seriously? that big of a difference. Why is this and wouldn't the aftermarket wear out regulators? Wouldn't the Delphi struggle to stay within specs?
Keep throwing money at it, it'll get better...
95 Tahoe 5.7 w/5 spd
Gone but not forgotten,
87 LWB 4x4 5.0 w/3 spd granny,
84 SWB 4x4 5.7 w/3 spd granny,
93 Full Size Blazer 5.7 w/5 spd,
97 Step-side Vortec w/5 spd.
I like shifting gears. |
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sgian
Valued Contributor
Posts: 4438
Loc: MO
Reg: 12-25-03
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07-23-12 07:31 AM - Post#2251145
In response to jham0077
40-50 psi is way too high for a TBI, I think that is the vortec fuel pump. Around 12 psi is about right for TBI.
| 04 Silverado Z71, 10 Cobalt |
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jham0077
"2nd Year" Silver Supporting Member
Posts: 320
Age: 36
Loc: Greenville, Il.
Reg: 11-04-11
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07-23-12 07:39 AM - Post#2251149
In response to sgian
I knew specs were 9-13. That's probably what it is, a wrong listing or misprint maybe. Not gonna chance it. Bite the bullet and fork out extra for the Delphi I guess.
Keep throwing money at it, it'll get better...
95 Tahoe 5.7 w/5 spd
Gone but not forgotten,
87 LWB 4x4 5.0 w/3 spd granny,
84 SWB 4x4 5.7 w/3 spd granny,
93 Full Size Blazer 5.7 w/5 spd,
97 Step-side Vortec w/5 spd.
I like shifting gears. |
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355Cheyenne
Senior Member
Posts: 3743
Loc: Northern MN
Reg: 10-27-04
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07-23-12 07:56 AM - Post#2251163
In response to jham0077
I would suggest the delphi option. It must be an error with that 40 to 50 psi because even the vortec is going to be a 60~70psi pump as the regulator should hold around 65psi on a vortec.
| 98 Silverado k1500 4x4 350 |
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jham0077
"2nd Year" Silver Supporting Member
Posts: 320
Age: 36
Loc: Greenville, Il.
Reg: 11-04-11
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07-23-12 08:36 AM - Post#2251177
In response to 355Cheyenne
Just ordered it. Even if it's not a misprint, I would worry about that high of pressure on my regulator. Thanks yall.
Keep throwing money at it, it'll get better...
95 Tahoe 5.7 w/5 spd
Gone but not forgotten,
87 LWB 4x4 5.0 w/3 spd granny,
84 SWB 4x4 5.7 w/3 spd granny,
93 Full Size Blazer 5.7 w/5 spd,
97 Step-side Vortec w/5 spd.
I like shifting gears. |
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 someotherguy
Moderator
Posts: 23393
Age: 43
Loc: Texas
Reg: 08-01-03
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07-23-12 11:04 AM - Post#2251214
In response to jham0077
Also keep in mind the 12 psi shown on the Delphi doesn't mean that's its highest output, they're just giving you the flow rate in gph AT 12 psi.
The other pump may be the aftermarket brand attempting to throw one part # at too many applications.
Richard
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jham0077
"2nd Year" Silver Supporting Member
Posts: 320
Age: 36
Loc: Greenville, Il.
Reg: 11-04-11
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07-23-12 05:49 PM - Post#2251376
In response to someotherguy
That was interesting. Just dropped the tank and found about 2 foot worth of "rotting" hose in the tank and some scaly looking sludge in the bottom. It looks as if someone broke their credit card  . Had to have happened at the lot were I bought it and been sloshing around shedding in my tank for over a year. That's my luck. Cost me $200+ for, at most, $80 worth of gas. A-hole thiefs.
Keep throwing money at it, it'll get better...
95 Tahoe 5.7 w/5 spd
Gone but not forgotten,
87 LWB 4x4 5.0 w/3 spd granny,
84 SWB 4x4 5.7 w/3 spd granny,
93 Full Size Blazer 5.7 w/5 spd,
97 Step-side Vortec w/5 spd.
I like shifting gears. |
|
355Cheyenne
Senior Member
Posts: 3743
Loc: Northern MN
Reg: 10-27-04
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07-23-12 07:08 PM - Post#2251416
In response to jham0077
shoot man that sucks, I think they sell a security gas cap that uses a key, might be worth looking into.
| 98 Silverado k1500 4x4 350 |
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rockfangd
Contributor
Posts: 547
Age: 27
Loc: Utica ny
Reg: 04-13-10
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07-23-12 10:30 PM - Post#2251492
In response to jham0077
I have never run into that before. Damn. not very bright. IF you didnt have to drop the tank you wouldnt have found out
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jham0077
"2nd Year" Silver Supporting Member
Posts: 320
Age: 36
Loc: Greenville, Il.
Reg: 11-04-11
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07-24-12 07:32 AM - Post#2251575
In response to rockfangd
It didn't happen since I've owned it. My dog would eat someone. I live in nowhereville anyways. The lot where I got it was in prime territory though.
Keep throwing money at it, it'll get better...
95 Tahoe 5.7 w/5 spd
Gone but not forgotten,
87 LWB 4x4 5.0 w/3 spd granny,
84 SWB 4x4 5.7 w/3 spd granny,
93 Full Size Blazer 5.7 w/5 spd,
97 Step-side Vortec w/5 spd.
I like shifting gears. |
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