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05-03-2023, 03:01 PM
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#1 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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2000 silverado fuel pressure
what is the pressure at key on and idle. I have 45lbs does not go up with rpm. 5.3 eng.
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1961 chevy K10 my build is------------61K10 build |
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05-03-2023, 09:38 PM
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#2 |
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Registered User
Join Date: Aug 2015
Location: Las Vegas NV
Posts: 369
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Re: 2000 silverado fuel pressure
Key on, 2 second prime = 55-62 psi
Key off, 10 minute bleed off = 5 psi or less You have a weak pump. Replace with GM only or you’ll be doing the repair again in a few months
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Customization is what you want it to look like -- not what other people think it should look like |
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05-05-2023, 02:28 PM
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#3 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: 2000 silverado fuel pressure
would this low pressure cause a miss fire?
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1961 chevy K10 my build is------------61K10 build |
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05-05-2023, 09:18 PM
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#4 |
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Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,091
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Re: 2000 silverado fuel pressure
As said above 58-60 psi no matter what the rpm. It's an electric pump not like a small block mechanical fuel pump.
Low fuel pressure could very well cause a miss fire. Any codes via the check engine light? |
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05-06-2023, 01:03 PM
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#5 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: 2000 silverado fuel pressure
it could have a bad fuel pressure regulator on the fuel rail also
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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05-06-2023, 04:48 PM
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#6 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: 2000 silverado fuel pressure
changed the reg with a new ac delco one no change. also have a 0300 code idles rough. have a new delfi pump i guess its time off with the bed.
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1961 chevy K10 my build is------------61K10 build |
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05-06-2023, 07:18 PM
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#7 | |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,975
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Re: 2000 silverado fuel pressure
Quote:
The Delphi pump is indeed the one to buy. Aftermarket pumps tend to fail shortly.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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06-28-2023, 04:55 PM
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#8 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: 2000 silverado fuel pressure
changed fuel pump no change of fuel pressure still 45# have not changed fuel filter tried but couldn't get the lines out after u-screwing them. will take it to a shop tired of laying under the tk.
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1961 chevy K10 my build is------------61K10 build |
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06-28-2023, 05:22 PM
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#9 |
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Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,975
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Re: 2000 silverado fuel pressure
Watch all 8 misfire counters and look for cylinders that seem worse than the others.
The cylinder(s) that is or are consistently slightly worse may have leaking injector(s)
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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06-29-2023, 04:45 PM
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#10 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: 2000 silverado fuel pressure
you could be right. my scanner won't do that. miss at idle after a warm up rev it up to 2k and it's smooth running. also won't hold pressure more than a few minutes. Need to have somebody to scope it for me.
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1961 chevy K10 my build is------------61K10 build |
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