So this is happening on this FINE Saturday afternoon...

68NewportDDD

Member
Joined
May 17, 2020
Messages
111
Reaction score
61
Location
Manassas, VA
16035722487821952766902121475627.jpg

Same problem...bowls are filling up and she starts and runs long enough to empty the bowls and then it stalls. Wash, rinse, repeat. I just replaced the coil...I have the new gas tank and sending unit at the house...was planning on replacing today
 
Disco the fuel line at the carb, stick the end of it in a small clear water bottle and crank it over With the key off from the starter relay and see how well the fuel is being delivered. It should fill the bottle in relatively short order, if it doesn’t there’s a multitude of things it could be but let’s start there.
 
Thanks...no tools with me...waiting on the wrecker now. Will start the troubleshooting process once home. Sad thing is.. I am about 2 minutes from home.
 
Make sure you replace any rubber lines in the fuel system, if the ones from the vents, or fuel sending unit by the tank are original they may be cracked and drawing air into the system causing a loss of prime in the fuel system.
 
Check fuel volume as stated above, possible hole in pick up/line, bad pump, or worn fuel pump push rod
 
I fought a similar problem with my 68. Turned out the sock filter on the inlet in the tank had split open and there was enough crap in the tank that when the fuel pump started sucking it would pull it in and plug off the flow. After sitting for a bit it would relax the suction and the crap would fall off and then it seemed fine for awhile again.
For the longest time I was sure it was fuel pump or filter or collapsing line, but not so.
Very frustrating.
Maybe not your problem but something to keep in mind.
 
Disco the fuel line at the carb, stick the end of it in a small clear water bottle and crank it over With the key off from the starter relay and see how well the fuel is being delivered. It should fill the bottle in relatively short order, if it doesn’t there’s a multitude of things it could be but let’s start there.
As many times as I've suggested this very simple test, no one has ever done it, or at least done it and reported back. It IS one of the most basic diagnostic procedures that there is and probably the first thing that should happen when it looks like a fuel problem.

A soda bottle, a jumper wire, a multimeter and some basic tools along with some common sense, will diagnose 99% of the problems we see here every day.

Rant over...
 
I actually pulled my rod out yesterday for a look....as I was suspicious that silver was eating another one. Earlier this season I was doing about 85 on the e-way and I felt like it started to run out of gas, that’s when I realized I hadn’t turned my electric pump on. I have it hooked up to my “rear air” switch so I turned it on and it stopped stumbling. I ordered one from Hughs right after that and finally got around to checking on it yesterday and to my surprise they mic’d out the same at 3 7/32”. I did put the new one in and obviously have something else going on but I Know what I have to do to get to the bottom of it.
One thing is for sure though and that’s I never leave home without a road tool kit in the trunk and a fire extinguisher within arms reach of the driver’s seat.
 
Updates? How old is the fuel pump? I had the diaphragm get eaten up in mine and cause similar weak delivery problems; Thanks, ethanol gas ;).
 
Maybe check the gas cap vent. If there is no venting then it creates a vacuum and stops flow. Long shot but I have seen it happen before.
 
This thread should have paused at reply #2, but noooooooooo. Everybody had leftover jello they couldn't wait to sling at the wall.
Get the car home, START with what Matt said and only then get back to us.

#troubleshooting
 
Yeah if he limped it only 2 minutes from home why not limp it back as that would be quicker and less costly than waiting for the tow. +time posting this, gotta love today's phone internet.
 
This thread should have paused at reply #2, but noooooooooo. Everybody had leftover jello they couldn't wait to sling at the wall.
Get the car home, START with what Matt said and only then get back to us.

#troubleshooting
But..but...then we couldn't share our wisdom and insight. What would we do all day if we couldn't do that???
 
This thread should have paused at reply #2, but noooooooooo. Everybody had leftover jello they couldn't wait to sling at the wall.
Get the car home, START with what Matt said and only then get back to us.

#troubleshooting
No one has mentioned the ballast resistor, so there is more Jello to sling.
 
Updates? How old is the fuel pump? I had the diaphragm get eaten up in mine and cause similar weak delivery problems; Thanks, ethanol gas ;).
No updates...Did not touch it today. Rainy Sunday...car is not in the garage (driveway is uphill)...the Washington Football Team played the Cowboys of Dallas...and I had to work most of the day. I will grab a bottle on my lunch break tomorrow. My guess is that the fuel pump need priming. I just need to get it running long enough to get it in the garage...was planning on replacing the gas tank and sending unit anyway.
 
Back
Top