early 99 hard start, engine miss - Ford Powerstroke Diesel Forum
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Old 08-20-2011, 06:24 PM
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early 99 hard start, engine miss

i've got a early 99 with a long crank before start and a miss too....had a friend pull the injectors to get them checked and noticed a couple of the injectors had the top oring torn and/or falling apart....do you think this could be the cause of the hard start and miss??? he said the injectors that had the bad orings were stuck in there pretty good...most came out rather easily but those two took alittle more umph
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Old 08-20-2011, 08:57 PM
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It could be that or it could be something like weak batteries. I had hard starts for first 3 months, thought it was normal then batteries went bad followed by alternator and starter. Get your batteries checked to make sure 1 isnt bad and the other is killing itself trying to start truck.
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Old 08-20-2011, 09:12 PM
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im gonna say no. but it prolly made a difference somewhere. i did my orings and they too were damaged but i saw no improvement.


is it hard when cold or hot or both or right after shutdown or like stated above, how slow are your cranks? batts and starter good? also need to check your icp readings to see if you are hitting the needed 500 psi to fire up the injectors from the hpop.
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Old 08-20-2011, 09:43 PM
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Let me add that if either of batteries, alternator or starter goes bad you will eventually have to replace or rebuild them because of the strain that gets put on them. I didnt believe it until my batteries went bad and 6 months later the alternator went bad and then about 2 months later my starter took a dump too. I would definitely start with the batteries now that I think about it because I took my truck to 2 different places and everyone wanted to replace fuel pump, injectors and rebuild top end. Eventually my batteries just wouldnt hold a charge and I replaced them and it was night and day.
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Old 08-21-2011, 11:49 AM
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what about the miss all the time? do you think orings would cause that?
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Old 08-21-2011, 11:52 AM
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its possible. but lack of hpo would cause it too. can you get a vid of it?
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Old 08-21-2011, 12:03 PM
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i'll have to put it all back together to get the vid, we did do a buzz test and they all seemed to pass??? maybe we wasted our time pulling the injectors,grrr....actually he pulled the valve covers to check the wiring harnesses and went ahead and pulled injectors...guess i'll send them to a local to have them checked????
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Old 08-21-2011, 12:06 PM
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naw just rering them with new ones in the proper order and go from there.
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Old 08-21-2011, 12:17 PM
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any way for me to bench test them with them out?
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Old 08-21-2011, 12:26 PM
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you need something like this to test them sadly.



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