Outlaw720 Posted July 28, 2012 Report Share Posted July 28, 2012 So my 1980 720 4x4 i dont thing is getting enough fuel. but how do you tell? my set up on it is a 32 36 Weber. but when its running the you can hardly see fuel goin though the filter. it only fills up when the truck is shut off. it idles great. but when i go take it on the test drive it goes from first gear to second great then cuts out. so im not to sure what that means but any info would be very cool! thanks in advance Quote Link to comment
DAT510 Posted July 28, 2012 Report Share Posted July 28, 2012 how old is the Weber? My 521 did this and turned out to be the float bowl. My Z31 also did this, but died after letting off the throttle, but this was because a vacuum leak. Quote Link to comment
ggzilla Posted July 28, 2012 Report Share Posted July 28, 2012 Do the fuel pump tests! Click for directions. Quote Link to comment
ggzilla Posted July 28, 2012 Report Share Posted July 28, 2012 when its running the you can hardly see fuel goin though the filter. it only fills up when the truck is shut offThat is normal looks. Don't worry about that, instead check that the fuel pump volume test is good. Quote Link to comment
Dawa Posted July 28, 2012 Report Share Posted July 28, 2012 lines could be clogged up with rust/dirt, thats what i would check. Quote Link to comment
ggzilla Posted July 28, 2012 Report Share Posted July 28, 2012 How do you test that? with the fuel pump volume test. Quote Link to comment
datzenmike Posted July 28, 2012 Report Share Posted July 28, 2012 The bottom of the electric fuel pump twists off. Inside is a filter. Check it or replace. Another inline filter may have been added in the engine compartment. A dirty or restrictive filter will cut the fuel flow to the carb. Quote Link to comment
Ratwagon1600 Posted July 28, 2012 Report Share Posted July 28, 2012 Everything what the other guys have said. I generally start at the fuel tank and move forward to the carb. Looking for fuel flow from the tank, no crimped or bent Lines, fuel filter(s) clean, fuel pump flowing at correct rate, float level correct etc. Good luck, these things can be particularly annoying. 1 Quote Link to comment
Outlaw720 Posted July 29, 2012 Author Report Share Posted July 29, 2012 yeah this whole truck has been a lets find the small issue kinda deal. i love the truck so its worth it to me. Quote Link to comment
daddydonuts Posted July 29, 2012 Report Share Posted July 29, 2012 Rubber fuel line not sealing properly? This happened on my Z when I replaced the tank, fuel hose and filters. Check those first before throwing lots if cash at it. Quote Link to comment
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