1974 Ford F350

Steinhauer

Steinhauer

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It completely dies, like it is starved of gas. It will start right up, run well, and can even drive around, then it will completely die. Always does this.

I replaced the fuel filter, accelerator pump, fuel pump, cleaned the carbs, cleaned the gas tank.

It has Holly 4 barrel carbs. What else am I missing?

I also replaced the plugs and wires.
 
Might need to have the Carb completely rebuilt. Cleaning is not always enough. Might also be getting too much gas at once. Choking/flooding it. Could also be the fuel line.
 
since its a oooold carb- have you checked thee float in the carb? does it die when you go around corners ? if so , perhaps you may need to shave the rubber float on the ends to keep the carb full of gas.

Another idea is to check the jets again. Since we are using ethanol now, that stuff is like a cleaner. I wouldnt be surprised if the decades worth of gunk is being cleaned out and plugging up the carb. After all its a 1974.

another thought- since I am not familiar with the ford in 70's, where did you replace the fuel filter? under truck or in the carb with gas line goes in? I remember my old chevy had a filter right where the gas line goes into the carb and I had to replace the filter 5 times in a month or so before it ran right.

Do you have any rubber hoses part of the gas line? perhaps either it has cracks in it letting air in the system, or it swelled up from the ethanol crap. I'd replace the gas line if you havent, just as a troubleshooting step.
 
Steinhauer said:
It completely dies, like it is starved of gas. It will start right up, run well, and can even drive around, then it will completely die. Always does this.

I replaced the fuel filter, accelerator pump, fuel pump, cleaned the carbs, cleaned the gas tank.

It has Holly 4 barrel carbs. What else am I missing?

I also replaced the plugs and wires.
Click to expand...

A Holley carb may be what you're missing. Never heard of Holly. :) :giggle:
 
radioman said:
since its a oooold carb- have you checked thee float in the carb? does it die when you go around corners ? if so , perhaps you may need to shave the rubber float on the ends to keep the carb full of gas.

Another idea is to check the jets again. Since we are using ethanol now, that stuff is like a cleaner. I wouldnt be surprised if the decades worth of gunk is being cleaned out and plugging up the carb. After all its a 1974.

another thought- since I am not familiar with the ford in 70's, where did you replace the fuel filter? under truck or in the carb with gas line goes in? I remember my old chevy had a filter right where the gas line goes into the carb and I had to replace the filter 5 times in a month or so before it ran right.

Do you have any rubber hoses part of the gas line? perhaps either it has cracks in it letting air in the system, or it swelled up from the ethanol crap. I'd replace the gas line if you havent, just as a troubleshooting step.
Click to expand...

The floats might be stuck. I will check that. It has an inline filter and a filter from the gas tank going to fuel pump.
 
Steinhauer said:
It completely dies, like it is starved of gas. It will start right up, run well, and can even drive around, then it will completely die. Always does this.

I replaced the fuel filter, accelerator pump, fuel pump, cleaned the carbs, cleaned the gas tank.

It has Holly 4 barrel carbs. What else am I missing?

I also replaced the plugs and wires.
Click to expand...

Try check fuel pressure gauge. If fuel pressure is normal then probably bad ignition system coil or poor connection.
 
Throw them into a junk yard. We don't need gas guzzling vehicles.
 
What size of engine? My guess is 460CID if I am correct. What mileage on the clock?

1) Was this truck stall or die after startup in cold? Sign of black smoke from tailpipe while warm up?

2) Does it run slight high idle during warm up (cold startup)? Smooth idle?

3) Was it die or stall when put drive in tranny? Die or stall when put foot on the gas pedal?

No answer these ???? then I can not help you. Have a nice weekend
 
deafsmogtech said:
What size of engine? My guess is 460CID if I am correct. What mileage on the clock?

1) Was this truck stall or die after startup in cold? Sign of black smoke from tailpipe while warm up?

2) Does it run slight high idle during warm up (cold startup)? Smooth idle?

3) Was it die or stall when put drive in tranny? Die or stall when put foot on the gas pedal?

No answer these ???? then I can not help you. Have a nice weekend
Click to expand...

It died when in gear - with full choke it would start right up. No black smoke. It idles low in warm up.
 
Ok, I'm disappointing that you didn't provide the engine size but I hope I can help you.... umm, low idle speed sounds like vacuum leaks, create rough idle that I believe. Take a look at vacuum hoses or lines around the carburetor, maybe spitted or kinked hoses like PCV hose at the carburetor or at the base of the carburetor. The vacuum leaks can cause stall or die. Because the air/fuel mixtures in the carburetor requires good vacuum, low vacuum in the intake manifold, can't draw the air/fuel mixtures. Take very close to the carburetor around to see if any vacuum hoses attached or disconnected. Way to fix the vacuum leaks first. I know the Ford big block have problems with bad EGR base gaskets where the carburetor mounted, and other intake manifold gaskets. Sometime wrong PCV valve or can be EGR valve. Any plms pm me if u like. Dst
 
authentic said:
Throw them into a junk yard. We don't need gas guzzling vehicles.
Click to expand...

No no no, I love oldies vehicles. I love to smell the big dino farts. Lol. Well I've been seen more old vehicles are getting the modern computer controlled engines, sounds better emissions.
 
Steinhauer, Did you remove a distributor cap? Which is the distributor have a point breaker or electronic pointless breaker? I know the electronic distributor used on a 1975 and later, and make sure your distributor use a point type. I think the dist cap have two pieces, color light blue at the top of the dist housing where the dist cap is topping on the light blue band and have 4 clips. This is electronic dist. If the electronic dist used, it would have an ignition control module problem. Dst
 
deafsmogtech said:
Ok, I'm disappointing that you didn't provide the engine size but I hope I can help you.... umm, low idle speed sounds like vacuum leaks, create rough idle that I believe. Take a look at vacuum hoses or lines around the carburetor, maybe spitted or kinked hoses like PCV hose at the carburetor or at the base of the carburetor. The vacuum leaks can cause stall or die. Because the air/fuel mixtures in the carburetor requires good vacuum, low vacuum in the intake manifold, can't draw the air/fuel mixtures. Take very close to the carburetor around to see if any vacuum hoses attached or disconnected. Way to fix the vacuum leaks first. I know the Ford big block have problems with bad EGR base gaskets where the carburetor mounted, and other intake manifold gaskets. Sometime wrong PCV valve or can be EGR valve. Any plms pm me if u like. Dst
Click to expand...

Sorry, I know it is a 1984 Motor and is a 7.5 liter.
 
deafsmogtech said:
Ok, I'm disappointing that you didn't provide the engine size but I hope I can help you.... umm, low idle speed sounds like vacuum leaks, create rough idle that I believe. Take a look at vacuum hoses or lines around the carburetor, maybe spitted or kinked hoses like PCV hose at the carburetor or at the base of the carburetor. The vacuum leaks can cause stall or die. Because the air/fuel mixtures in the carburetor requires good vacuum, low vacuum in the intake manifold, can't draw the air/fuel mixtures. Take very close to the carburetor around to see if any vacuum hoses attached or disconnected. Way to fix the vacuum leaks first. I know the Ford big block have problems with bad EGR base gaskets where the carburetor mounted, and other intake manifold gaskets. Sometime wrong PCV valve or can be EGR valve. Any plms pm me if u like. Dst
Click to expand...

Ok thanks - the next chance I will have to play around with it will be this Monday.
 
Steinhauer said:
Sorry, I know it is a 1984 Motor and is a 7.5 liter.
Click to expand...

Bingo, 7.5L is 460 CID ( cube inch displacement ), really its from other year. Were the original ignition , fuel and emission system same used? I would like to pinpoint the vacuum leaks. If everything is ok then point to the carburetor problem like the posters mentioned. Otherwise, the gnition system should be cause.
 
deafsmogtech said:
Bingo, 7.5L is 460 CID ( cube inch displacement ), really its from other year. Were the original ignition , fuel and emission system same used? I would like to pinpoint the vacuum leaks. If everything is ok then point to the carburetor problem like the posters mentioned. Otherwise, the gnition system should be cause.
Click to expand...

That's what I already said about ignition system but he ignored me. :roll:
 
The Highlander said:
That's what I already said about ignition system but he ignored me. :roll:
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No ... not ignoring. I am reading all of the posts. I am writing a "to do" checklist for Monday when I have the time to look at everything and will report back.

Here is a video of it from yesterday afternoon:



I am going to restore it to functionality, then restore it cosmetically.
 
The Highlander said:
That's what I already said about ignition system but he ignored me. :roll:
Click to expand...

:lol:, I agree with you about the ignition but many posters says fuel system problems, didn't says anything about the fuel pressure gauge or ignition.

Mine is to check vacuum source in the engine with a vacuum/fuel pressure gauge to see what the engine's health.... weak vacuum can be low compression, large vacuum leaks or incorrect base timing.
 
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