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02-23-2014, 05:03 PM
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#1 |
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Registered User
Join Date: Jun 2007
Location: Buda, Texas
Posts: 865
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No fuel pressure
New tank.
New sending unit. New rubber lines. Steel lines blown out. New fuel filter. New fuel pump...installed correctly. 1970 gmc 2500....402...rebuilt. This is the second fuel pump in 3 weeks. Shouldn't the fuel filter be full? Mine is empty...fuel spurts in when it feels like it. No pressure on gas cap when I open it. Frustrated in Texas.
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 70chevytruck |
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02-23-2014, 05:13 PM
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#2 |
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Registered User
 
Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: No fuel pressure
If you pore gas in the carb and get it running will it stay running?
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02-23-2014, 05:37 PM
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#3 |
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Senior Member
Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: No fuel pressure
i would pull out the push rod and check it out.
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Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks 
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02-23-2014, 05:53 PM
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#4 |
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Registered User
Join Date: Feb 2008
Location: Tacoma Washington
Posts: 890
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Re: No fuel pressure
Check everything from tank to fuel pump by siphon, then look at the ushrod and make sure it moves when you roll the motor over by hand.
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I know a guy who's addicted to brake fluid. He says he can stop any time. 72 K10 396 75 Cj5 MPI 350 Chev 67 Chevelle 396, 4 speed 74 FXE 08 Tahoe |
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02-23-2014, 06:00 PM
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#5 |
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Registered User
Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: No fuel pressure
Sounds like a air leak before the pump. Without a check valve the fuel will drain back out of the carb after it sits.
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02-23-2014, 07:30 PM
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#6 |
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Registered User
Join Date: Jun 2007
Location: Buda, Texas
Posts: 865
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Re: No fuel pressure
Connected a fuel line from pump to gallon of gas....still have issue.
Must be bad fuel pump again.
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70chevytruck |
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02-23-2014, 07:32 PM
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#7 |
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Senior Member
Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: No fuel pressure
maybe somebody put the wrong push rod in and it is too short? i would pull it out and compare with new one at parts store
not for sure if BBC and SBC are the same length
__________________
Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks
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02-23-2014, 09:13 PM
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#8 |
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Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: No fuel pressure
It does sound like the fuel pump push rod is hanging up by how you describe it. I'd pull the pump and see if the rod moves in and out freely with my finger, if it does make sure its a bb pump, a question, why is it the second f pump in 3 weeks?
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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02-23-2014, 09:50 PM
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#9 |
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Registered User
Join Date: Feb 2011
Location: Irondale, Missouri.
Posts: 196
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Re: No fuel pressure
maybe a bolt that might be to long in the front of the block that is holding the fuel pump rod?
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http://67-72chevytrucks.com/vboard/s...0&referrerid=0 |
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02-23-2014, 10:21 PM
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#10 |
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Registered User
Join Date: Jul 2011
Location: Des Moines, Iowa
Posts: 3,016
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Re: No fuel pressure
flat pump cam eccentric?
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