Fuel Fluke

sumbitmopar said
I ordered a new fuel tank, 3/8's pickup, straps and a Carter mechanical fuel pump from RockAuto.com for the 67 Notchback I bought 2 months ago. Everything delivered to the house $297+change. The car had been sitting for 2 years and had the original tank. Everything bolted in fine and the car started right up and runs great. The previous owner had reported that the only thing wrong mechanically was the fuel pump. Apparently he was right. With all you've been through, that's what I'd do. If that fixes it, great. If not, I'd take a look at the carb too. I'm no carb wiz and I just don't have the time and patience , so I'd try a different carb ( borrow one maybe ) and see if that makes a difference. Then you can get your Holley up to par or buy a new one. By then your pretty much new from front to back and with any luck you'll have solved the "Mysterious Case of the Fuel Fluke". Good Luck!

Well I installed the stock type fuel pump and now the pressure is up to 7.5 and it seems it stay there all of the time. Yesterday when I got home and left it running the psi was only 4.5 with the Carter pump. When I got home today and left it running the psi was 7.5 with the stock pump.

But... I still have the running out of gas feeling going down the road in 4th gear. The car will run fine in the first 4 miles but after that it starts stumbling. When it starts stumbling I can let off of the gas and coast and it seems to "catch back up". If I mash the accelerator down in 4th gear and let off then mash it again it's like there isn't enough gas. I go the exact route every time and it always starts acting up at the exact same place!!! It's the weirdest thing I have ever dealt with a engine. I have a 500 cfm Eddy carb that I can try before I remove the tank again. I guess that's what I need to do.