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Feels like its running out if gass??
#1
Ok, its a 351 4v, stock
Was running perfect,  then it stalled. Felt like it ran out of gass. Finally got it restarted, drove home kinda sluggishly. Last year i dropped the tank, very clean, replaced  all hoses, pump, filter. The carb looks like it was a fresh rebuilt. Lately it seems to run perfectly, then it feels like its running out of gass , stalles. Gass is fresh, cleaned with gum out, lubed all moving parts. Any ideas?
Alex
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#2
How long is it running before it starts the issues? What is the temp gauge reading when the issue starts?

'73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

'73 F code convertible. Bright red. Needs total restore. (IE HOT MESS)

- Jason
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#3
As soon as it feels like it's going to stall pull the gas cap off, see if the tank is venting through the charcoal cannister, if not you'll hear the air suck into the tank when you remove the cap.

If that's OK the problem may be the fuel filter or fuel pump. You'll need to test the pump for pressure and volume output.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#4
(04-10-2018, 06:31 PM)73pony Wrote: How long is it running before it starts the issues? What is the temp gauge reading when the issue starts?

1st time, Fully warmed up
Now it seems to do it anytime, could be 1 minute or 15 minutes after start
The engine runs cold,  never going 1/4 way on the guage
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#5
(04-10-2018, 06:32 PM)Don C Wrote: As soon as it feels like it's going to stall pull the gas cap off, see if the tank is venting through the charcoal cannister, if not you'll hear the air suck into the tank when you remove the cap.

If that's OK the problem may be the fuel filter or fuel pump. You'll need to test the pump for pressure and volume output.

Pump and filter new.  This is a 1970 w/ cali emissions.
Wondering if the cooler temp has anything  to do with this issue??
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#6
New means very little, anymore.

I wouldn't put much faith in the temperature gauge, the only way to make sure is an infrared thermometer on the upper hose or water neck. In any case, I don't believe a cold running engine would cause your problem, but you should make sure your thermostat isn't stuck open.

The next time it stalls, pull the air cleaner lid and pump the throttle lever a few times to see if you have fuel in the carburetor and squirting fuel out of the accelerator nozzles.

It's also possible that the coil or condenser is breaking down when it warms up. Are you still running points? If so, how do they look and is the gap and/ or dwell adjusted correctly?



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#7
It is also very easy to confuse STALLED feels like  "running out of fuel" and spark issues!  When I hear FINALLY got it started , I picture a car that has gas, BUT WEEK or intermittent spark hence the feeling of no fuel.  

Usually with these old cars, (assuming compression) it really comes down to spark or fuel.  Since you have gone through the fuel system (short of a pressure test at the pump)  you  may have to look at secondary spark next.    

I guess (after reading your prior post, fuel issues etc etc) I would question IF you had fixed the fuel issue of last July, HOW you did it and when you did, did you also do the same work on the fuel system (posted today) OR didn't do that then.

Mark
P.S.  Please understand , when I reply I look into a persons past post, photos and level of pain they can endure financially.  It isn't a "why are you doing that thing" rather the only way I can answer a question as we rarely get all the info all the time in the first post.
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#8
Had a similar problem once that turned out to be defective mustard top coil. Ran fine cold, as soon as engine (or surrounding air) warmed up the coil is would begin to act like it was starved for fuel. Once the coil cooled down it would start right up, but it would then die after a few minutes.
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#9
(04-10-2018, 10:41 PM)Don C Wrote: New means very little, anymore.

I wouldn't put much faith in the temperature gauge, the only way to make sure is an infrared thermometer on the upper hose or water neck. In any case, I don't believe a cold running engine would cause your problem, but you should make sure your thermostat isn't stuck open.

The next time it stalls, pull the air cleaner lid and pump the throttle lever a few times to see if you have fuel in the carburetor and squirting fuel out of the accelerator nozzles.

It's also possible that the coil or condenser is breaking down when it warms up. Are you still running points? If so, how do they look and is the gap and/ or dwell adjusted correctly?
Still running points, all looks new
How would a mechanical  fuel pump fail itermitatly?
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#10
(04-11-2018, 09:11 AM)Bill73Ragtop Wrote: Had a similar problem once that turned out to be defective mustard top coil.  Ran fine cold, as soon as engine (or surrounding air) warmed up the coil is would begin to act like it was starved for fuel.  Once the coil cooled down it would start right up, but it would then die after a few minutes.

Mustard top coil??
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