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Anonymous Posted on Feb 25, 2015
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7.3 liter diesel excessive cranking before starting. Glow plug light comes on and off quickly

Should start much faster , battery cranks down by the time it starts.

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J.D. Browning

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  • Posted on Feb 25, 2015
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Depends on the outside temperature for how long the glow plugs lite stays on , also if glow plug relay senses a shortage it with cycle faster as well, watch the dash volt meter when glow plugs cycling , it should dip to near 9 volts just briefly when glow plugs are on , with a 93 if it's never had a injector swap , then id say thats more your problem , old injectors valves tend to hang part ways open and drain high pressure fuel off from the injector pump when sitting there ,especally overnight , takes a lot of cranking without an electric lift fuel pump (yours is mechanical) to reprime the high pressure pump , and sorry these dont have a manual prime like marine engines do , there are some more advanced "tricks" to do to help reprime a pump but the main cause is worn out injectors

David Harrelson

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  • Ford Master 5,456 Answers
  • Posted on Feb 25, 2015
David Harrelson
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Bad glow plugs or timer relay.

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1answer

What is the problem ? I have a 1993 ford f 250 7.3 liter diesel. New Glow Plugs. Glow plug light comes on and goes out very quick , engine cranks excessively , before starting
I think you nailed it with the amount of time you glow plug light. It should stay on until you engage or it should be timed to stay on longer.
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Feb 25, 2015 • 1993 Ford F250
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1993 ford f250 7.3 liter diesel starting problems
It is worth ensuring the glow plugs are actually receiving current by attaching a test lamp during the starting process. Heater plug timer relays can cause problems.

A good cranking speed is necessary for good cold starting and also good injector spray patterns and break-off pressures. Bad spray patterns and low pressures, slow cranking and fuel drain-back are common problems.
Low compression pressures can also be a problem. If the other stuff has been checked and found to be ok it is worth having them tested.
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Feb 25, 2015 • 1993 Ford F250
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I have a 1994 f 350 turbo diesel IDI when I try to
Don't just keep cranking if it don't start right away' Give the starter a break. It's getting hot because you just keep cranking on it. Any vehicle diesel has glow plugs to heat the fuel chamber to make it start fast. Be sure you are making use of the glow plugs and it will start fast. If your glow plugs are not working, find out why. Could be just the glow plug relay or connection to it. Or possibly the glow plugs are burned out. Either way, you HAVE to have glow plugs in use on a diesel upon initial start up till it's warmed up. Then will start without them. Most are automated system. You just have to wait till the glow plug light goes out to start cranking on it. I hope this helps you to more understand the workings of a diesel cold start system.
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96 Ford F-350 Turbo Diesel. Replaced 4 glow plugs on driver side. After replacing the glow plugs and the glow plug relay, the truck will crank slow and not start. Batteries power drained quickly while...
Have a load test done on the batter to check for failing cells. For diesels to start any thing less than a fully charged battery good battery is a waste of time as the engine needs fast RPM to heat the air to ignite the fuel and slow rpm's just doesn't cut it.
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1986 ford f350 won't start
The solenoid click sounds very strong, implying that you have a charged battery and the ignition circuit is functioning out to the solenoid. Suspect an issue with the starter motor. Is the starter motor installed and connected properly?
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1996 Ford F350 diesel won't start
Hi Austin, I think you hit the nail right on the head! Replace the glow plugs:-) Regards John
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Won't start but cranks has 300k miles. Check fuel pump working, replace glow plugs, checked fuses and relays, fuel pump won't come on but works hooked it direct to battery, wait to start light does not...
If you can't pull the codes from the pcm it has either died or lost it's ground assuming it has power. I would try to get a wiring diagram and check both the power and the ground for the computer itself, because it is what turns on the pump and the wait to start light.
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Feb 25, 2011 • 1999 Ford F350 Regular Cab
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This is a diesel 87. I turn the key over to glow pug position and get no light. I have a block htr and the car starts anyway when I go to ignition. Today same situation but in the gnition position I get...
Glow plug light indicates if the system is working as designed too. If you have one or two glow plugs out it will start but idle rough at first.

If the glows do not come on, engine will not start or do so after extended cranking and idle rough if temperature below 50F.

If glow lamp not coming on, the 80 amp fuse may be blown. There is a black box on the left inner fender just back from the headlamp. . Under the cover is a thick fuse held by two Phillip head screws.( IIRC.)

If the engine will not crank, try moving the shifter lever back and forward while you turn ignition to crank. If still no crank, it is often the electrical switch under the ignition switch burnt.

Are the other cluster warning lamps, Oil, Battery, Brake, etc coming on when you turn on the ignition.?
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I have a 2.4L diesel Toyota Hilux. Its was -30 and the battery died. I have since jump started it and it drove fine (when the battery was dead and tried to start it in very cold, my husband thinks it could...
diesel engine have small starter helpers called glow plugs that heat the combustion air so that it can self ignite the diesel fuel
reasons for hard starting are
slow cranking speed---battery not charged enough or not big enough to do the job
injectors squirting and nit atomizing--- take the car to an accredited diesel pump/ injector repair shop for tip replacement and adjustment
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keep the fuel tank full ,especially in cold climate as there is hot return fuel from the injectors that causes condensation in the tank--water -- and that promotes the growth of a fungus which damages the pump and injectors
use diesel fuel condition on a regular basis to prevent that condition or keep the tank more that 3/4 full to stop condensation occuring
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I have a 1998 1.8 diesel van, once its running its ok, but getting it started can be difficult (esp in cold/damp) Have you got any tips for starting, does this model have a heater plug, if so what symbol...
Sounds like the glow plugs are frazzled. There is one electrical wire going to a plug, then each plug is connected in sequence. The glow plugs are heating devices used to get the fuel up to temperature before ignition.

They are fiddly to replace, but are relatively inexpensive and the most common source of issues with cold-starting diesel engines (first thing to fail).

Some cars had a 'pre-heat' available with glow plugs, where you simply turn the key part-way to 'on' and you would see a glow plug light come on (looks a bit like a picture of a spring). If you see this light on your van, you can turn the key to turn on the glow plugs and they will pre-heat your engine slightly and make starting easier
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Nov 10, 2009 • 1998 Ford Escort
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What is the problem ? I have a 1993 ford f 250 7.3 liter diesel. New Glow Plugs. Glow plug light comes on and goes out very quick , engine cranks excessively , before starting

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