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1979 F250 fuel problem

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Old Aug 22, 2017 | 06:12 PM
  #1  
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RamdyZavage
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1979 F250 fuel problem

Alright so I got this f250 drove fine the first week I had it no problems what so ever. Then it started having starting issues and flooding issues. I replaced the battery and spark plugs ran fine for like 4 days. Than was hesitating so I put new fuel lines (soft) and fuel filter ran fine. Then i was driving it for like 20 minutes and it died no puttering out just stopped I had just let off the throttle and it just stopped running and refused to start back up. I thought I heat soaked the starter so I bought a heat sheild for it, it had that problem before so though why not it's just a wrap. Since it stopped working after it just died it's been sitting it's been about 2 week it just turns and turns sometimes it'll putter a bit but no start. If I pour fuel right down the carb it'll start but die once it's used all the fuel I have about a full tank and about 6-10 gallons in the rear tank so I'm not just out of gas. I put a gallon of gas and did a separate fuel line that went from the gallon of gas to the fuel pump to the carb and it would stop at the fuel filter not go to the carb it didn't start. Any ideas I'm thinking fuel lines.
side note theses a small puddle of trans fluid forming and all I've done is try and turn it over not drive any ideas on that as well it's a 400 farm truck so the amount if done to it already is almost double what I bought it for.
thanks for the response
 
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Old Aug 22, 2017 | 06:37 PM
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Ideas? Yes, better sentence structure and punctuation would help deciphering your problems. Run-on sentences don't help.....

So, what carb and where's the fuel filter in relation to the carb? Hard line from the pump to a rubber line, filter and then to the carb? Disconnect the line to the carb after the filter and have it empty into a clean can. Have someone crank her over.

Got fuel? Yes?

Then yer carburetor needs a good cleaning/blown out/rebuild, and then check/set the floats.

No fuel on cranking?

Check/replace all rubber lines, check for air leaks, etc going to the fuel pump.....disconnect the fuel line at the pump....and place that line in a clean can. Blow about 10 psi air in the tank and watch for fuel.

Results?
 
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Old Aug 22, 2017 | 07:08 PM
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RamdyZavage
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Originally Posted by Filthy Beast
Ideas? Yes, better sentence structure and punctuation would help deciphering your problems. Run-on sentences don't help.....

So, what carb and where's the fuel filter in relation to the carb? Hard line from the pump to a rubber line, filter and then to the carb? Disconnect the line to the carb after the filter and have it empty into a clean can. Have someone crank her over.

Got fuel? Yes?

Then yer carburetor needs a good cleaning/blown out/rebuild, and then check/set the floats.

No fuel on cranking?

Check/replace all rubber lines, check for air leaks, etc going to the fuel pump.....disconnect the fuel line at the pump....and place that line in a clean can. Blow about 10 psi air in the tank and watch for fuel.

Results?
thanks man I'm about to lose my job at the moment don't have time for grammar. But, it's a new carb and all the soft lines are brand new. I just need it to run my last car took a swim in 4ft of water cause of a rain storm while I was at work. I don't know how to do the 10 psi test I'm Problably gonna send it to a shop at this point. I've tried everything that I can.
 
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Old Aug 22, 2017 | 11:42 PM
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Our trucks can be frustrating, but they're actually pretty simple. They need three things: gas, air and spark

Air's probably not your problem.

Does it have good spark? Pull a plug wire and check. If it seems to quit running when it gets warm, it could be the ignition module. But check for spark.

And they need gas. Run a new hose from the pump intake to a jerry can. Crank. Check for fuel at the carb. If so, good. If not, possibly fuel pump.

If front is flowing fuel, move to back. Disconnect the hose from the tank sender. Plumb in a jerry can. Check for fuel. No fuel up front means bad tube/hose. Fuel from can might be a bad pickup.

This is stuff you can do for a few bucks in a couple hours. You sure don't need to be paying shop diagnostic fees if you're losing your job

Hope it works out for you with the job
 
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Old Aug 23, 2017 | 11:58 AM
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If you have a spare ignition control module (and if you don't, you should!) try connecting that. The problems you describe could be caused by a failing ICM.
 
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Old Aug 23, 2017 | 12:49 PM
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Ck it from one end to the other for a PO installed fuel filter that might be clogged. X2 on does it have spark. If yes then is sounds like a fuel delivery issue, start closest to the carb and work your way back.

X2 on see if it will run from a good gas source (2 1/2 gal can/big Gatorade bottle) right at the fuel pump. Connect a short line on the inlet side of the pump and put it in the gas container. Does it start?

If yes, then go to where the frame mounted steel fuel line goes from back to rubber and connects to the sending unit. And connect it a known good gas source. Does it start?

If yes, you might have a clogged sending unit pick up filter sock. Time to drop the tank and pull the sending unit.

Fuel pumps usually work then they do not. Cheap and easy to replace.
 
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