Re: The Duchess Project: 1940 Super 8 Convertible Sedan
Posted by Joe Santana On 2018/5/9 23:08:26
We still have the same problem with the car stalling out the moment I start up the hill and give it more gas.
Things had been going well. Idling at 325-400 rpm, revs fine, (if you watch the video, you'll see) then when I drive it up a hill in the hood, it dies, acting like it's not getting fuel.
While we waited for the rebuilt pump from Kanter (the kit I had on hand from Classic Preservations was woefully incomplete), I siphoned and dropped the gas tank. Back by the tank I added a 2-ft bypass of fuel line for the e-pump plus a pressure regulator set to 5 lbs, plus a check valve on the regular line so the e-pump wouldn't pump gas back into the tank. Please see attached diagram.
I also replaced the spark wires with the "Packard" type made fresh from Dwight H.
We tested the pressure of the e-pump to be sure we had 5 lbs, before we added the new mechanical pump, and also to be sure there are no leaks from adding the bypass line.
We started the car and warmed it up. We adjusted the mixture screws (not done before) per the instructions from Daytona while running a vacuum test from the intake manifold, 16.5 lbs. was the best, so we set the screws there.
I also removed the overdrive regulator wire that goes to the distributor because it can also cut ignition momentarily if it isn't working properly. It gets its cue from the governor (speed-related). Just to eliminate that possibility.
We took it for another test drive. It seem to want to buck, like zoom for a second. It does not die at the stop sign. It's so hard me to adjust to such low RPMs. I think it's dying when I stop, but it's not.
So we drive another block, it zooms a bit. Stop again, then head up the hill. About 3 driveways up it quits. I back into a driveway to be level. Pedal down pressing the starter, but it doesn't start till I flip the electric fuel pump. We make it home, a little zoom in places.
We removed the cute new fuel filter. Same MO
We added 10 gallons of gas (it had 7 or 8 already). Same deal.
It has to be something simple.
We'll make a video of the drive tomorrow.http://www.mktx.com/packard/EngineRev.mp4http://www.mktx.com/packard/323RPM.mp4
Attach file:
(44.70 KB)
Things had been going well. Idling at 325-400 rpm, revs fine, (if you watch the video, you'll see) then when I drive it up a hill in the hood, it dies, acting like it's not getting fuel.
While we waited for the rebuilt pump from Kanter (the kit I had on hand from Classic Preservations was woefully incomplete), I siphoned and dropped the gas tank. Back by the tank I added a 2-ft bypass of fuel line for the e-pump plus a pressure regulator set to 5 lbs, plus a check valve on the regular line so the e-pump wouldn't pump gas back into the tank. Please see attached diagram.
I also replaced the spark wires with the "Packard" type made fresh from Dwight H.
We tested the pressure of the e-pump to be sure we had 5 lbs, before we added the new mechanical pump, and also to be sure there are no leaks from adding the bypass line.
We started the car and warmed it up. We adjusted the mixture screws (not done before) per the instructions from Daytona while running a vacuum test from the intake manifold, 16.5 lbs. was the best, so we set the screws there.
I also removed the overdrive regulator wire that goes to the distributor because it can also cut ignition momentarily if it isn't working properly. It gets its cue from the governor (speed-related). Just to eliminate that possibility.
We took it for another test drive. It seem to want to buck, like zoom for a second. It does not die at the stop sign. It's so hard me to adjust to such low RPMs. I think it's dying when I stop, but it's not.
So we drive another block, it zooms a bit. Stop again, then head up the hill. About 3 driveways up it quits. I back into a driveway to be level. Pedal down pressing the starter, but it doesn't start till I flip the electric fuel pump. We make it home, a little zoom in places.
We removed the cute new fuel filter. Same MO
We added 10 gallons of gas (it had 7 or 8 already). Same deal.
It has to be something simple.
We'll make a video of the drive tomorrow.http://www.mktx.com/packard/EngineRev.mp4http://www.mktx.com/packard/323RPM.mp4
Attach file:
(44.70 KB)
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