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TimberJack

Rough idle while cold

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2003 427 has a rough idle until engine reaches normal running temp. It’s like it has a slight skip and while idling the truck shakes. Once you run it up to normal temp is smooths out. I’ve just recently installed new injectors and turbo, witch it had the problem before changing. 

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I’d check specs on fuel pressure, make sure it’s tuned and run it. There are still engines, like John Deere’s 13.5 liter that still run terrible cold.....in 2019. 

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I will put a gauge on it this evening an check it. What should the pressure be? 

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