![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: Dec 2013
Location: West, TN
Posts: 312
|
Fuel starvation issue? Please help.
I recently bought this 84 GMC cheap because it didn't run, needed a transmission and had been sitting awhile. Swapped in a used trans, new plugs, wires, rotor and cap. Fixed a few other things and started driving. Seem to run and drive great and then this problem showed up and has me stumped. Once the truck warms up and after a short drive it won't accelerate fast. It will speed up, but slowly. I put on a new fuel pump, fuel filter, carb base gasket and a different quadrajet that I had and didn't solve the problem. Also, I made sure the heat riser was fully open at full operating temp. Keep in mind that this truck is mostly original with a 305 and the ESC distributor still in place. However, all of the smog parts and converter are long gone. Any suggestions? Thanks for any and all help.
Last edited by natedogg; 06-24-2018 at 09:46 PM. |
![]() |
![]() |
![]() |
#2 |
Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,356
|
Re: Fuel starvation issue? Please help.
When it starts running bad pull over and open your gas cap to see if there is vacuum in there. It could be a malfunctioning vent. If all the smog equipment is gone already then I would buy a Skip White distributor so you can have a normal vacuum advance.
__________________
76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
![]() |
![]() |
![]() |
#3 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,518
|
Re: Fuel starvation issue? Please help.
Cracked fuel lines on the top of the tanks and on the switching valve
|
![]() |
![]() |
![]() |
#4 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,628
|
Re: Fuel starvation issue? Please help.
There also is a filter in the carb where the fuel line hooks up....That's where I found my problem once....it was a piece of Teflon tape floating around in that filter.....
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Oct 2014
Location: Calgary Alberta
Posts: 161
|
Re: Fuel starvation issue? Please help.
I had a truck once that would run but wouldn't drive. No power. Exhaust filled with mouse nests.
|
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: Dec 2013
Location: West, TN
Posts: 312
|
Re: Fuel starvation issue? Please help.
Thanks guys. I did put in a new fuel filter and that didn't help. Truck is a single tank and I'll check the lines on top of tank for cracks and check the exhaust for rats nest.
|
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Oct 2015
Location: Ottawa, Ontario, Canada
Posts: 752
|
Re: Fuel starvation issue? Please help.
Since you checked the carb fuel filter did you make sure the truck does not have another aftermarket fuel filter on between tank fuel pump, Or could be timing off a little. check to make sure the dist. hold down not loose. OH when you change a fuel pump did you make sure you got the air out of the line. Because a air bubble moving around ( fuel pump to the carb ) when motor warm it will cut the fuel down make you crazy like not getting a full fuel bowl for the dam you higher rpm.
__________________
![]() Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change. |
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Dec 2013
Location: West, TN
Posts: 312
|
Re: Fuel starvation issue? Please help.
There is no extra filter between pump and tank. When I put new pump on, I left line off the carb and cranked it over and watch gas shoot out. Distributor is tight and set correctly.
|
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Aug 2005
Location: Louisiana
Posts: 711
|
Re: Fuel starvation issue? Please help.
There is a fuel pickup screen/sock in the fuel tank, perhaps its clogged.
Is the timing advancing as it should? |
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Jun 2014
Location: CO
Posts: 738
|
Re: Fuel starvation issue? Please help.
I would say it is electrical since you know you are getting gas. Check coil check control module
__________________
79 Chevy 2wd BIG10 350 TH400 |
![]() |
![]() |
![]() |
#11 |
Registered User
Join Date: Dec 2013
Location: West, TN
Posts: 312
|
Re: Fuel starvation issue? Please help.
Turns out it was the control module. Swapped in a used one I had laying around and truck runs great now.
|
![]() |
![]() |
![]() |
#12 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,844
|
Re: Fuel starvation issue? Please help.
Glad to hear you got it figured out!
__________________
Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
![]() |
![]() |
![]() |
Bookmarks |
|
|