Joined: Sun Jul 13 2014, 10:04PM
Location: Mechanicsburg , PA
Posts: 151
I just put new fuel lines on my 383 '66 Polara. It ran fine for a couple of days, but now I'm not getting fuel to the carb. I thought it might be a bad fuel pump, so I replaced that and still no luck.
When I take the line of of the supply side of the pump, gas comes out. Tank is full and the sending unit is less that a year old. I only get a small bit of gas into the filter.
Joined: Fri Apr 21 2006, 07:28AM
Location: England
Posts: 739
Airleak? You say you've put new fuel lines on. The entire way? I had a few small pinholes in the short bit of pipe in my fuel sender. It was enough to send fuel, but made for really poor starting because pressure was down.
Joined: Sun Jul 13 2014, 10:04PM
Location: Mechanicsburg , PA
Posts: 151
3ducks wrote ...
Airleak? You say you've put new fuel lines on. The entire way? I had a few small pinholes in the short bit of pipe in my fuel sender. It was enough to send fuel, but made for really poor starting because pressure was down.
That's what I'm thinking it is. The new line is all metal, except for the 1" or so of rubber where it couples to the tank and the fuel pump.
What confuses me is that it ran for 50-100 miles and then started giving me trouble. Acting like it was starved for fuel or vapor locked. Now i just get a small spurt of fuel at the filter, right before the carb.
Joined: Sun Jul 13 2014, 10:04PM
Location: Mechanicsburg , PA
Posts: 151
Mike66Chryslers wrote ...
My fuel delivery issue wound up being caused by the fuel pump pushrod being worn down.
Problem found. It's the fuel pump push rod. The one milled end is 1/4" shorter that the other. The shorter end was the one against the cam. What's the danger in just replacing the pushrod with a new one? Will it cause worse damage? Or am I better off with a block off plate and a electric fuel pump?
Joined: Sat Aug 19 2006, 05:03PM
Location: Ontario, Canada
Posts: 2919
I installed a spare pushrod and mine has been fine so far. Slather moly break-in lube on it as extra insurance. Also change the oil. All the metal that ground off of that pushrod is now in your crankcase!
Joined: Sun Jul 13 2014, 10:04PM
Location: Mechanicsburg , PA
Posts: 151
Mike66Chryslers wrote ...
I installed a spare pushrod and mine has been fine so far. Slather moly break-in lube on it as extra insurance. Also change the oil. All the metal that ground off of that pushrod is now in your crankcase!
Thanks Mike! How many miles since you changed it? No major damage?
Joined: Mon Oct 10 2005, 10:04PM
Location: Glendale Heights, IL
Posts: 116
Mine went bad on my 68 Newport, 383. Had replaced it in 2003 when I restored the car and had the engine rebuilt. It lasted until 2015, but only had about 2300 miles on it. For the last couple years, it was difficult to start, and would often be hard to keep running at idle, until it got so bad it would no longer start.
Mike pointed me in the right direction last summer, I replaced the pump and pushrod, the old one was about 3/8" shorter than the new one! Starts much faster and runs smooth again.