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| not enough fuel reaching the carb. will elec fuel pump help? https://www.slantsix.org/forum/viewtopic.php?t=31093 |
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| Author: | kenicb [ Sun Sep 14, 2008 8:19 am ] |
| Post subject: | not enough fuel reaching the carb. will elec fuel pump help? |
super six Carter BBD set up Here's the problem: -at high speeds car has occasional sputter as if running out of gas -at idle or when coming to a stop light, it stalls out the conditions: very little fuel is reaching the fuel filter. ( abt an 1/8 in deep on avg ) Went through the checks in the shop manual. I pulled the fuel tank, and the tank is clean. no clogs. inspected the fuel line to the pump. No leaks. REPLACED the fuel pump with a new one. Still not enough fuel. Ran a line from a gas can to the new fuel pump. Not squirting very much. Which leads me to think the lobe on the camshaft is worn. will an electric fuel pump solve this? I do not have the the experience or know-how to replace a camshaft. thanks so much. Keni |
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| Author: | SlantSixDan [ Sun Sep 14, 2008 8:40 am ] |
| Post subject: | |
I think your conclusion is probably correct; the cam lobe is worn and not giving a full fuel pump stroke. A thoughtfully-selected and properly-installed electric fuel pump will be an effective workaround for the problem. You need a pump that produces no more than 5 psi, and 4psi will be preferable. Mount it near the fuel tank; they are much more effective pushers than pullers. Pick out a quiet pump or the noise will drive you crazy. Mount it securely, safely, and carefully. Install two safety switches: an inertia switch that will kill power to the fuel pump in a hard collision, and a relay triggered by the oil pressure warning light with a starter motor bypass. This way, the fuel pump will run when the engine is being cranked, and it'll run when the engine has oil pressure, but if the engine stalls, the pump will stop running (just like the mechanical pump stops pumping if the engine stops) — a good way to prevent the electric unit pumping the contents of your fuel tank into the engine and onto the street via the carburetor. The inertia switch is readily available from NAPA; I can supply the P/N next time I'm in my office. The oil pressure hookup just requires an ordinary changeover relay and the wire-up is simple. The other thing you'll want to pay attention to is your charging system's capacity and idle/low-speed characteristics. If your alternator is weak at idle and low speed, the fuel pump will aggravate that situation. |
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| Author: | kenicb [ Sun Sep 14, 2008 5:25 pm ] |
| Post subject: | re: |
thanks Dan da Man. I'll order the pump and have a mechanic put it in. I'm never good with electrical connections unless it involves 1/4 in gtr cables and xlr microphone connections:) Hey the video has made it to the TOP 5 on GAC go vote! We're the only independent in the Top 20 and its freaking the industry out. and the break down scene was for real. i had just put the super 6 in to try and get the car in the video. But it wasnt running so good. My name is Keni Thomas and I approve of this message! www.gactv.com click top 20, click vote, click ME! |
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