When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Having some fuel delivery issues with my 72. Replaced the carb, fuel pump, and checked all my vacuum lines. Car will accelerate to 35 just fine, then start to cut out around 50mph. Car hates hills over 10° and will die on them.
looks like the fuel line got kinked at the clip on the frame closest to the pump. What’s the easiest way to get the bolt off so I can fix the kink and get proper fuel delivery?
When you swapped out the pump, did you swap out the "S" hose too?
Not so sure that is a kink in the line. Looks to me like it's been rubbing a pinhole and spraying gas. Post 1, picture 1.
“S” hose replaced as well. No gas is being sprayed, I sprayed brake clean to clean off the 50 year old screw/clamp. I have confirmed multiple times now the system is not leaking at all. I also took a video of how the fuel system is working, in line fuel filter is filling up completely when car is off, drops down to 3/4 full at idle, and drops to maybe 1/4 full at full throttle, which at this point the engine starts acting up due to lack of fuel.
I have not. Would there be any way to check it and see if that’s what’s restricting flow without draining the tank/dropping the tank?
its long but here has sock in it too.. it doesn’t have to leak to screw up fuel supply.it can suck air .although this is a 79 so access may beeasier for you but should be able to see it thru cap.
Another thing, checked my headlights and the boot for the headlight actuator rod is torn. Any possibility a vacuum leak this large could be causing me trouble?
NO, your sock looks collapsed , dirty and plugged up . It will cause a fuel restriction to carb .Also is that rust/dirt on bottom of tank ? , if so tank should be dropped and cleaned or replaced .
Steven
Agreed, inside of that tank looks absolutely horrible. And the pickup sock is totally shot. Complete flush and clean at a bare minimum. Plus if that rust has made it into your fuel feed line. Blockage could indeed be a major issue.
You can run a flexable fuel line without raising the body as I did with my EFI. but to replace those old, no doubt rusted original steel lines with replacement steel.
Yes you need to raise the body.
replace all lines, and clean out tank new sock.. you do not have to raise body to change.. at least a 79..the leak i showed only showed up with pressurizing the line..it would NOT leak but sucked air..and cause fuel issues..
that rubber on headlights looks like a dust cover.. so probably not an issue.
i would bet your sock is not sole issue either..but the rest...
So, at the least I’m replacing the tank, however I should be taking the body off and fixing the lines that way? This really is turning out to be a whole resto…
Took a pick tool and scraped the sock a bit, moved it around. Car now revs up to 5k before cutting out… replacing the tank next week. Ordering this weekend, guess I have another project to do!
Looking at all that rust in there. replacing that tank sounds like a good idea.
And while you have the tank out, back blow those fuel lines with compressed air. Couldn't hurt.
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
I would blow back through the line like 4 vettes suggested and see if you get any crap out of it. You may not. If you dont want to raise the body and you have to run fuel line you can get braided steel fuel line that would be easier to run
and pressurize it with fuel or brakleen in it and check for leaks..
plug the rubber end.
not sure your year but I didn’t raise body to replace.
it was my issue here all along https://www.corvetteforum.com/forums...e-on-road.html
Pinched fuel line?
