On my 1986 GT I discovered a pretty decent sized leak coming from the center of the car. After closer inspection I found that it was gasoline. After dropping the tank, I noticed saturation around and in the fuel pump seal and all round the O-Ring. The leak was still happenning when the car was just sitting in one place, so I dont understand how the leak would leak from there. The previous owner did the fuel pump just beforeI baught it and was trying to get it to start after sitting for 18 years. The O-Ring wasn't completely sealed all the way, but still, unless the fuel is being sprayed up into the cap, I don't see why its leaking.
Also, the car has been having some running problems. After starting the car, it will rev up to 2000 RPM then drop to 0 if cold. After 5-6 times of this, It will stay and idle around 500 RPM for a fe seconds before sputtering out. When warm, It will bounce from 700-1800 RPM slowly and sometimes sputter. I thought that This was becuase of my CAT since they were prone to failiure. Also, The exhaust pipe and side of CAT glow dark-to-medium orange once at temperature.
Would my CAT cause this hard-running due to exhaust restriction? Or would it possibly be from a leaky fuel pump? The beige rubber line from the pump to the fuel pipe inside the gas tank doesnt have any kind of seal or clamp on it; and I didnt know if it was supposed to at all. I twisted the beige pipe gently to see if it was tight, and it turned quite easily.
It would be much easier If I didn't have Windows 10 so that I could actually use the image poster...
Would seem like a hose or line above the tank leaking?
Id check fuel pressure.
How could I do that? Do i need a special sensor or something? I tried pressurizing the system by plugging the pump line but I could see no residual leaking.
[This message has been edited by DasCabbageMan (edited 04-02-2018).]
The fuel lines should have hose clamps on them. The connections will leak if they aren't clamped. Also, try to use fuel injection clamps, if you can find them. Regular hose clamps can bite into the hose, and cause it to leak over time.
(Hint: Search for "fuel injection hose clamps" on Amazon)
Canadian tire sells fuel injection clamps as well as the short chunk of hose that you may need. If it is leaking with the car just sitting there I would suspect a leak in the hose spraying fuel up at the pump cover. When I first got my Fiero running after sitting for 10 years, the cat had deteriated to a pile of loose crumbled bits that plugged the flow almost completely. But the problem you are describing sounds like a vaccuum leak.
Canadian tire sells fuel injection clamps as well as the short chunk of hose that you may need. If it is leaking with the car just sitting there I would suspect a leak in the hose spraying fuel up at the pump cover. When I first got my Fiero running after sitting for 10 years, the cat had deteriated to a pile of loose crumbled bits that plugged the flow almost completely. But the problem you are describing sounds like a vaccuum leak.
I have done checks over the vacume lines multiple times; they seem okay. I suppose i could take off my EGR and inspect the metal pipe more closely. Many have said that 9/10 times thats where the vaccume leak would come from. They are apparently very brittle and prone to cracking.
Leaks at Top of tank can leak liquid or fumes. Even at very top when driving and tank near full because liquid moves. Leak in bottom or tank lines to/from engine most leak liquid. Leak in fill and vents lines most leak fumes but can leak liquid if you fill or have a full tank. More problems... Fume leaks work both ways and let air/moisture in that can cause big problems because moisture cause rust to start and Ethanol love water and pulls more moisture it the tank.
screwy idle can be vac problem and/or bad power/grounds. See my Cave, Vac Leaks and Wire Service
F'd Cat or Ignition problem can causes glowing pipe(s) but Iffy O2 sender or vac problems can make the engine to run lean cause very hot exhaust too. If Exhaust manifold(s) glows then expect crack/broken parts. And doesn't matter how made. Cast iron and high $ headers can break heated to glowing. Glowing pipes then expect the cat is dead even if not the root cause because overheat for any reason can make the guts to melt and plug.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
Really? PIP limits the filesize to 1024 pixels?? My iphone takes pictures 3 times as big.... How can I use the pictures my iphone took wihtout cropping them to infinity and beyond?
Wow, this was quite tedious:
the leakiness around the seal...
And the setup I currently have for the fuel pump...
Also, I've tried to "blow air" through the vaccume lines just as a wild test idea, and heard a small air leak, although I couldnt pinpoint it. Is it supoosed to be able to leak like that? The other ones I tested did not give any air out. The one I tested was on the manifold above the distributor:
I feel like the fuel line in my photos isnt doing its job. I head that the fuel system gets up to like 40-60PSI and this beige colored line isnt tightened on at all. It may be jusr spraying up against the lid and causing it to leak through the seal. I can't tell what the old system was in place of this susbtitiute hose, but would it be worth using a couple of fuel line clamps like the ones off the metal pipes from the gas tank on it?
[This message has been edited by DasCabbageMan (edited 04-16-2018).]
Does anyone have images of the old ststem for the fuel pump? The old system looks like a black thick cylinder above the pump... what does that cylinder do?
Look up "pulsator". Replacement fuel pumps don't appear to require it. It's often now replaced with a short length of submersible fuel hose.
Would the replacement hose come with clamps for it? The previous owner did it himself; so I have no idea what products he used... also; what would happen if the pulsator was removed from the OEM fuel pump?
[This message has been edited by DasCabbageMan (edited 04-17-2018).]
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