Trouble starting 96 7.3 in chilly weather(45) - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 5 (permalink) Old 08-31-2017, 04:47 PM Thread Starter
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Trouble starting 96 7.3 in chilly weather(45)

Hey guys I have a 1996 f250 7.3 ext cab auto 4x4

The truck is stock other than the ebpv is gutted ( because of oil leak from pedestal)

It will start if I cycle the gp's about 6 times but if I don't it will just crank and crank
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post #2 of 5 (permalink) Old 08-31-2017, 05:00 PM
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Re: Trouble starting 96 7.3 in chilly weather(45)

It does no good to cycle the glow plugs 6 times since they stay on for up to 2 minutes after you turn the key on. The wait to start light is just a idiot light to get owners to wait a bit.

Get a digital volt/ohm meter and test the glow plug relay. When you first turn the key on there should be less than 0.3 volts difference between both of the large post. If the relay test out OK then it is time to test the glow plugs through the connectors on the valve cover gaskets.

96 F250 XLT 4x4, 4:10 gears, 5 speed, Tymar intake and HX hose, downpipe, pyro and boost guages, coolant filter, Luc clutch
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post #3 of 5 (permalink) Old 08-31-2017, 05:21 PM Thread Starter
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So basically if it's got a issue starting once the temps start to drop it's the glow plugs? Or the relay?
Thanks for the help I've never had to mess with this stuff before
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post #4 of 5 (permalink) Old 08-31-2017, 05:40 PM
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Re: Trouble starting 96 7.3 in chilly weather(45)

Those are the two big culprits in a cold weather no start condition.

You can also try plugging it in for 3 or so hours and see if it starts.

96 F250 XLT 4x4, 4:10 gears, 5 speed, Tymar intake and HX hose, downpipe, pyro and boost guages, coolant filter, Luc clutch
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post #5 of 5 (permalink) Old 08-31-2017, 07:30 PM
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Re: Trouble starting 96 7.3 in chilly weather(45)

Yep, the only way that cycling the key multiple times will do anything is if you leave it on for a couple minutes before you turn it back off again. If you have a voltmeter in the dash instead of an idiot light, you can see the voltage drop when the relay picks and see it pop back up a little when it turns off.

Plugging in the heater for a couple hours is the easiest way to see if you have a glow plug related problem, after that, it's either the relay, the glow plugs, or a wiring problem. Remember, only use Motorcraft or Beru glow plugs if you replace them, and I highly recommend upgrading to the Stancor relay if you have to replace that.
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