Having problems with your 1993 Ford F350 ?

1993 diesel f350 rough idle hard starting

\015 I have a 1993 Ford F350 regular cab 4X4 with 7.3 diesel non-turbo with 102,xxx miles. we use it for my company which results in 7-10 hours of stop and go driving per day, 3-4 days per week. The truck is driven from job to job and shut off in between. Problems started to develop last year and seem to just be very slowly getting worse. I take it to my mechanic but it does not act up for him and always starts, even tho once it had to be flat bedded to him it was so bad and it still started right back up after an hour or so of sitting. It does numerous things including hard starting throughout the day, usually after about 40-50 miles of driving it can require over 10 seconds of cranking before it starts all the way up to dead batteries and having to be jumped because you have tried so long and cranked it so much, we have been through 7 starters in the past year. (mechanic only road tests it for like 10-15 miles) purging like when you are at a stoplight and you touch the gas it delivers more fuel than you are pressing the pedal. also, it idles rough at times also after 40-50 miles of driving, seems to be idling on 5-6 cylinders instead of 8. Just trying to get some other opinions from people who are more familiar with the engine as my mechanic is mostly best at gasoline engines. One person told me recently really the only thing to go wrong with these is the injector pump.\015 Posted / edited by AnonymousUser on : 01-06-2020

Answers :

Whats the fault code in eec when a no start or stall has occured ?
\015\012scanners for that year have come down allot it should only cost about 40 bucks and yes they have instructions for operation if you have never used one of these before
\015\012untill you know this you could guess all day on causes for this might be as simple as your injection timing is off or costly as injection pump failure untill you know what eec says at time of failure your only guessing!
Check for fuel at Schrader valve near fuel filter.
Other than that, injection pump could be heating up, causing it to lose prime. Also check external lift pump. Should be located under drivers side frame rail about mid-way.
(Check lift pump first. You should be able to hear a buzz when you turn key to on position only. Now, if that pump doesn't work, it will cause hard starting, long cranking and will burn out the injection pump. The injection pump is only made to pressurize the fuel going into the cylinder. It's not made to draw fuel from fuel tank.) Damage may already have been done to the injector pump.
When truck was towed to shop, it was probably picked up by back end which makes the fuel go to front of truck. At that point, truck will start. Possibly why mechanic could start it right away.
Question: Is it hard to start when cold? If so, possible culprit would be the glow plugs.
Sounds most likely to be lift pump.
Did the truck ever run out of fuel? The lift pumps could burn out if it ever runs out of fuel.

Repair Help & Product Troubleshooting for 1993 Ford F350

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