Join Date: Dec 2013
Location: Perry, GA
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Early 99 F-350, rough start then like a switch fine!
OK guys, I’ve 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 I’ve done.
Buzz test, All injectors OK
Replaced Injector O-rings
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 don’t 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.