Need Help!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

87oldie · 08-06-2010, 09:32 PM

Hey everyone im new here and got a problem with my 87 c10 and cant seem to figure it out :/

I got a 350 TBI and it seems like fuel isnt reachin the fuel injectors. We changed the fuel pump about 3 times and only once it ran for about 20 minutes and died. We also changed the throttle body, injectors, and fuel filter but still same problem. Anybody have an idea on what it could be??? thanks for the help

87oldie · 08-06-2010, 10:05 PM

anyone???

**old Rusty C10** · 08-06-2010, 10:18 PM

get a pressure tester and see wht the pressure at the injectors is

cor86 · 08-06-2010, 10:31 PM

I agree, check the pressure. Without a pressure check, are you even certain it is a fuel issue? If it is, it could be as simple as a clogged line, or ???? I have replaced many parts in the past that didn't need replacing, just because I assumed I knew what the problem was. I hope, for your sake, this is not the case, but tools like a $17 Autozone vacuum/fuel pressure gauge can save you from unnecessarily spending 20x more.

87oldie · 08-06-2010, 10:37 PM

well i was thinkin i have two gas tanks so do they run the same fuel lines??? because if they run different fuel lines wat are the chances of both of them being clogged

iroc12valve · 08-07-2010, 12:11 AM

on TBI trucks there is a fuel line from each tank that goes to a control unit under the cab that has an electric box which connects to the switch on your dash for pass/driver tank this box switches the power from left fuel pump to right(or vica-versa)and switches a valve inside as well. after the box there is one supply line that runs to the filter and then to the throttle body and then a return line

I have never heard of it happening but i can easily see how the control box could malfunction and leave you with niether left nor right fuel tank supply and thus no fuel at the motor

Hope this helps

PugDad · 08-07-2010, 01:52 AM

Quote:

Originally Posted by 87oldie

well i was thinkin i have two gas tanks so do they run the same fuel lines??? because if they run different fuel lines wat are the chances of both of them being clogged

I have dual tanks. The fuel will come from either the left or right, and go through a single common filter before heading forward to the engine compartment. At least in my case, a clogged filter would have same effect regardless of which tank I selected.

87oldie · 08-07-2010, 01:53 AM

hmm... wheres the control box at?? they were also tellin me that it could be the computer or sumthing electric is dat possible?? we already changed the fuel filter so i doubt it wuld be that

**old Rusty C10** · 08-07-2010, 09:44 AM

chances are that if it was something the computer controls you would have a check engine light on... ig the computer itself was fubar it could not....again check pressure first.. clogged injector or filler tube... improper switching with the dual tanks either in the switch or the valve.. there are thousands of things it could be

87oldie · 08-07-2010, 01:31 PM

hmm need to check all these things out. thanks for the help everybody

08-06-2010, 09:32 PM	#1
87oldie Registered User Join Date: Jul 2010 Location: Houston, Texas Posts: 44	Need Help!! Hey everyone im new here and got a problem with my 87 c10 and cant seem to figure it out :/ I got a 350 TBI and it seems like fuel isnt reachin the fuel injectors. We changed the fuel pump about 3 times and only once it ran for about 20 minutes and died. We also changed the throttle body, injectors, and fuel filter but still same problem. Anybody have an idea on what it could be??? thanks for the help

08-06-2010, 10:05 PM	#2
87oldie Registered User Join Date: Jul 2010 Location: Houston, Texas Posts: 44	Re: Need Help!! anyone???

08-06-2010, 10:18 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,297	Re: Need Help!! get a pressure tester and see wht the pressure at the injectors is __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

08-06-2010, 10:31 PM	#4
cor86 Registered User Join Date: Mar 2009 Location: Warsaw, IN Posts: 93	Re: Need Help!! I agree, check the pressure. Without a pressure check, are you even certain it is a fuel issue? If it is, it could be as simple as a clogged line, or ???? I have replaced many parts in the past that didn't need replacing, just because I assumed I knew what the problem was. I hope, for your sake, this is not the case, but tools like a $17 Autozone vacuum/fuel pressure gauge can save you from unnecessarily spending 20x more. Last edited by cor86; 08-06-2010 at 10:35 PM.

08-06-2010, 10:37 PM	#5
87oldie Registered User Join Date: Jul 2010 Location: Houston, Texas Posts: 44	Re: Need Help!! well i was thinkin i have two gas tanks so do they run the same fuel lines??? because if they run different fuel lines wat are the chances of both of them being clogged

08-07-2010, 12:11 AM	#6
iroc12valve Registered User Join Date: Jun 2010 Location: niagara, ontario Posts: 109	Re: Need Help!! on TBI trucks there is a fuel line from each tank that goes to a control unit under the cab that has an electric box which connects to the switch on your dash for pass/driver tank this box switches the power from left fuel pump to right(or vica-versa)and switches a valve inside as well. after the box there is one supply line that runs to the filter and then to the throttle body and then a return line I have never heard of it happening but i can easily see how the control box could malfunction and leave you with niether left nor right fuel tank supply and thus no fuel at the motor Hope this helps __________________ 1991 V3500 350TBI/4l80/205 D60/14bff - Crew long 1987 IrocZ-28 525 horse/567 Lb Tq 383 1976 K30 on 39.5s One wheel drive thanks to a np203 and some K5's lol

08-07-2010, 01:53 AM	#8
87oldie Registered User Join Date: Jul 2010 Location: Houston, Texas Posts: 44	Re: Need Help!! hmm... wheres the control box at?? they were also tellin me that it could be the computer or sumthing electric is dat possible?? we already changed the fuel filter so i doubt it wuld be that Last edited by 87oldie; 08-07-2010 at 01:54 AM.

08-07-2010, 09:44 AM	#9
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,297	Re: Need Help!! chances are that if it was something the computer controls you would have a check engine light on... ig the computer itself was fubar it could not....again check pressure first.. clogged injector or filler tube... improper switching with the dual tanks either in the switch or the valve.. there are thousands of things it could be __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

08-07-2010, 01:31 PM	#10
87oldie Registered User Join Date: Jul 2010 Location: Houston, Texas Posts: 44	Re: Need Help!! hmm need to check all these things out. thanks for the help everybody



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