has to be 50 degrees - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 04-07-2011, 08:49 AM Thread Starter
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Exclamation has to be 50 degrees

unless its 50 degrees outside,my 1999 f350 will crank till no tomorrow before it starts.at 50 and above ,just one cycle and she starts.bought new glow plugs from ford but have not installed them yet.im not so sure thats the problem,although it seems that way.im thinking maybe oil temp or air temp sensors.truck always starts.just takes more time on cold days.after first start ,it always starts quick.get diesel smoke pumping out of pipe when cold cranking,but clears right up when fires.when temp is warm,starts fast and no or very minimum smoke out of pipe.overall this truck is a tank and runs great.7.3l with 170.000 ,still pulls my 8000 lb tt with ease.please can someone help.
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post #2 of 7 Old 04-10-2011, 04:40 AM Thread Starter
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hot blooded

well its 53 degrees today in the great norteast.finnaly ,i can start my truck ,first start of the day.i turned key on,waited for light,started right up.love this weather.any way,i think this thing thinks its 50-60 degees everyday.has to be eot sensor.at 40 degrees ,just cranks long time before starting.today ,its a brand new truck.i gotta figure this out.please help.gonna change eot sensor and hope for the best.
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post #3 of 7 Old 04-10-2011, 07:11 AM
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Lightbulb RE: has to be 50 degrees

Could be an EOT or temperature/air sensor. From your description of symptoms you describe & she runs great, and only starts hard when its cold? The glow plugs aren't receiving the signal to light. Unlikely all 8 glow plugs will go bad at once, but possible.
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post #4 of 7 Old 04-17-2011, 11:06 AM Thread Starter
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forget it

sorry for the questions.didnt relize i joined a brag forum.
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post #5 of 7 Old 04-17-2011, 03:41 PM
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Smile has to be 50 degrees

My '95 acted the same way till I replaced my computer and glow plugs. Now she doesn't even think of hesitating at startup. Hope I was some help.
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post #6 of 7 Old 04-18-2011, 09:33 AM Thread Starter
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help

thank you very much,been pulling my hair out.have motorcraft glow plugs ,gonna replace.see what happen,have no codes.no engine light,except when starting,ya know.replaced injector o rings couple months ago,cause developed hard start when warm,that fixed that.but new to diesels.cold start problem existed before o ring job.seperate issue.glow plugs are next ,and gonna ck harnesses uvc.thanks again.live upstate ny.getting warm,but have to nail this one.
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post #7 of 7 Old 05-18-2011, 07:05 AM Thread Starter
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fixed

changed EOT sensor along with top oil and she starts at any temp now.fixed
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