Question about 2003 Ford F350 Super Duty DRW SuperCab

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Diesel engine just cuts out. Sometimes shuts off then back on in a nano sec, other times I have to put it into neutral at 30-60 mph and restart it.

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Have you checked or change the fuel filter? also check the system for loose fittings that may alow air to leak into it, also its a good idea to flush tank lines may be restricted with resadue. run a scan on ecm

Posted on Oct 03, 2009

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2003 Astro high idle almost runaway


If it is still running away then you might have a vacuum leak or a stuck throttle.... turn off the engine get someone to step on the gas and watch the action of the throttle cable and look to see if anything is sticking...under no circumstance do you fire that engine while your body is under the hood.....if that fan belt snaps or a piece of clothing gets caught in the moving parts it will end with a trip to the hospital.

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1990 ford lariat f350 with a 7.3 diesel when stopping at a light or stopping in general it doesn't want to shift all the way down to first you have to put it in neutral in or for the truck to not shut


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My 1993 Ford Festiva 1.3L occasional engine hard start, sputters on start up then runs fine, but sometimes has a slight "cut out" on gentle acceleration, problem clears up but comes back at lower speeds....


sound like your throttle positioning sensor or even yhe throttle it self it is electronic as far as i know the tiny metal bands come of and if the reading from the pedal sensor is incorect fuel shut of wil ocure

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Why would a 98 grand prix gtp transmission pull just fine for 5 milesthen quit cut off car put in nueatral 5 r 10 secs grank back put in gear pulls like a new 1 same thing over and over please explain


There are many things that can cause this, a bad transmission pump or torque converter, restarting the engine helps it because you are stopping the flow of oil and then restarting it oil starts to flow again and increase pressure as you accelerate ,
Another problem could be in the vanes of the torque converter with the same concept when you shut it down and restart it.

You would need a ****** shop to check pressure and put scan tool on it to watch readings, and last it may be low on fluid or internal leakage causing loss of pressure.

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2000 7.3 stalls going 70 mph or anytime have to turn key to off position before it will restart


You can get a free wiring diagram and fusebox layouts at Autozone.com. Just register your truck on their site.

If you look at the wiring diagrams you should see that the starter lockouts and shift interlock is a separate process. Neutral is a position which allows the starter to work.

What you are having problems with is the RUN circuit on the ignition side. You could have a bad ignition switch. The switch should have an Ignition Relay in the Powerbox. If this is the Diesel, they have a KILL circuit to stop the engine that is different than a gas engine since the Diesel fires by compression.

So looking at your wiring diagram, you would be looking for a connector or component which could cut out intermittently. I am thinking more of a Relay because you have to reengerize the circuit by turning the ignition switch to OFF, before going to CRANK, and then RUN. Most of the time, the starter interlock only controls the start circuit.

Another possibility is the Antitheft. If the KEYreader loses communication with the Security system, it may stall. I know that vehicles will not start without the correct key or if an unprogrammed Blank is inserted.

I hope my solution helps.

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Honda makes diesels - awesome.

Well, I know diesels aren't very complicated engines, however when anything goes wrong it's usually the fuel filter. I suggest changing the fuel filter, and see what happens.

Can't think of much else that would cause a diesel to that. And you say it only does it ever now and then, and you have to shut it off and then restart it.

Let me know if you need any further assistance.

carsandcomps,

Guru, Premium Expert @ Fixya.com

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sounds like a broken wire, but i cant say where, on ignition, fuel pump, under dash, quik scan could save alot of time an money

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