Early 99 F-350, rough start then like a switch fine! - Ford Powerstroke Diesel Forum
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Old 12-06-2013, 10:28 AM
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Early 99 F-350, rough start then like a switch fine!

OK guys, Iíve been searching and reading as much as I can as this being my first diesel. And you guys seem to have some great information and good advice. So I bought this early 99 f350 dually to pull my 16k lbs 5th wheel, in which seems to be doing a good job with.
Problems I know of;
Very hard start unless I have it plugged in overnight, even on 60 degree nights.
The GB relay is going bad and have one on its way.
It has a good amount of blow by from the CCV and oil fill tube.
It has 315k miles.
What Iíve done.
Buzz test, All injectors OK
Replaced Injector O-rings
CCV mod
Gauges, fuel pressure, trans temp, EGT and Boost
OK, now with the problem! In the morning, every morning if not plugged in, I have what seems to be a missing cylinder or two, the EGT seems is lower than normal and then all of a sudden like a switch was flipped it runs fine and the EGT is back to normal. (EGT Probe on drives side manifold) This will happen only on cold starts and about 3 to 4 min on the road. What it feels like is that one or some of the injectors are not firing then bam, they do. I see some people say the injectors can stick and then some say that these types of injectors donít stick! Any ideas on what could be causing this or just to confirm my thought that I will need to replace some injectors, would be great.
Thanks
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Old 12-08-2013, 09:18 AM
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I'm having the same problem. Hope someone has some ideas.
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Old 12-08-2013, 11:52 AM
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have you checked the oil level?

oil change might not be a bad idea too if it hasnt been done in awhile.

i have 240k miles and my truck starts just fine. was 15 degrees last night and went out to work this morning and she fired right up. not plugged in and still original injectors and hpop

also synthetic oil helps.

blow by out the cap is normal, if you flip the cap over and it blows it off then you have problems.
if the cap just vibrates off your fine.

most stock gp relays burn up within 6 months to a year. white rodgers/stancor gp relay is wayyy better than stock
motorcraft glow plugs are the only way to go.
also look into getting new uvch, 40 bucks each from dieselorings.

verify you are getting correct oil pressure at startup.
pull the icp and if theres oil coming through it buy a new one.

if you really want something to scan the truck and read all the vitals the AE with ford package is the way to go.

Last edited by blue99stroker; 12-08-2013 at 11:55 AM.
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Old 12-09-2013, 08:44 AM
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I've had the oil change every 4k since I've had it, and i check the level on every fill up. I've just installed a rodgers GPR and still the same problem. I did how ever put Autolite glowpugs in, they were the only ones that had 8, and it was an after thought while installing the O-rings.
I cant telll if the oil cap vibrates off or blows off, the engine rocks a bit at idle. I'm going to try to do a compression test soon. And I'll look into the ICP, looking into the AE software.
Thank you for the responce
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Old 12-09-2013, 08:59 AM
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Well I was told that if you're truck starts hard blowby could be a suspect because I was thinking I had oil consumption problem
and possibly dusted engine with crack in inlet side boot on turbo. Turns out ccv mod fixed my issue.
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