7.3 no start when cold - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 10-09-2012, 04:12 PM Thread Starter
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7.3 no start when cold

nen glow plugs nen injectors new fuel heater element, won't start with temps around 40 degrees and lower. If I plug in block heater the night before it starts good. What controlls fuel heater and manifold air heater. please help I have spent over $ 3000.00 with ford dealers truck runs good, but won't start cold without block heater.
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post #2 of 10 Old 10-10-2012, 07:34 PM
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Obviously something was missed, but what? That is the $3000.00 question.

I'm in the same boat, I have to wait until it warms up or keep it plugged in. I haven't spent any money on fixing it yet, but a couple of years ago I replaced the glow plugs, starting relay, and the valve cover gaskets because the connector pins were burnt.

I know the glow plugs are getting juice and I have ohm out the glow plugs. The glow plugs all read about 1.4 ohms cold. This leads me to believe that the fuel air mixture must be off.

I'm off work this week and will be spending a fair amount of time looking it this issue. Whatever I find, I will post as soon as I understand what the fix is.

Hopefully someone else will post a solution before me.
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post #3 of 10 Old 10-11-2012, 06:54 AM Thread Starter
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Thanks good luck with yours.
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post #4 of 10 Old 10-11-2012, 07:41 AM
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have you checked the glow plug relay,if you only check resistance of the glow plugs the relay may be bad,my 97 had 3 bad glow plugs and it would start when it was cold after a few trys,does it smoke alot once it starts
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post #5 of 10 Old 10-16-2012, 05:26 AM
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I am having the same issue (2001 7.3) I am a new diesel owner so keep that in mind. When mine finally does start it smokes pretty bad for a little bit. I don't have a plug in on my, that I am aware of at least. Thoughts?
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post #6 of 10 Old 10-25-2012, 07:02 AM Thread Starter
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The block heater plug on mine is under front bumper on the drivers side. The power cord runs along driver side frame rail to back of motor where the block heater is just above the oil filter.
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post #7 of 10 Old 10-25-2012, 07:37 AM
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Check the glow plug relay

Beamed in from the Death Star with lasers and sh*t

Colin S. Age:22 Certified Diesel Tech, Infantry US ARMY
E99 7.3 6spd 4x4 6637, 4" straight pipe, 365,000 miles
"wear your high mileage as a badge of honor"

04 GMC 2500 4x4 Duramax/Allison
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post #8 of 10 Old 10-25-2012, 04:59 PM Thread Starter
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Colin 7.3 thanks the relay is new and working.
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post #9 of 10 Old 10-26-2012, 06:52 AM
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is the truck still having problems starting?

Colin S. Age:22 Certified Diesel Tech, Infantry US ARMY
E99 7.3 6spd 4x4 6637, 4" straight pipe, 365,000 miles
"wear your high mileage as a badge of honor"

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post #10 of 10 Old 10-28-2012, 04:39 PM Thread Starter
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Colin Thanks for your interest. So far this week it has started. It runs rough and smells of raw diesel, it has to idle for several minutes before it will rev up or even move it's own weight. I think the fuel heater I replaced has helped it some. Glow plugs and relay are new. Fuel filter and fuel heater are new.. Ford checked and replaced two injectors. Beside all this, Some times the oil will disappear from the high pressure oil pump tank. Have to refill it to get it to start. Ford said the bad injectors could stick and let the oil drain out, but that didn't cure that problem. Thanks Frank
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