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Rough Idle and tons of white smoke when cold

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Old 10-15-2014, 04:15 PM
N3M0H45 N3M0H45 is offline
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Rough Idle and tons of white smoke when cold

Hey, just got an '85 N/A 6.9 F350. The guy I bought it from put in a new IP and injectors (kind of). The "new" injectors are BB code instead of E (which seems kind of pointless to me).

Here's the problem: when the engine is cold, even in warm weather, it takes a minute to start, then puts out a huge cloud of diesel-smelling white smoke and idles rough. However, once it's warmed up it runs perfectly, doesn't smoke, and starts instantly. More fuel than the engine can burn when cold is my guess.

It's stock other than the bigger injectors and a straight-pipe and better intake. It has no blow-by. So I'm hoping someone can tell me if the problem could be the BB injectors or the new IP not being timed properly. I played with the timing a bit (turned the IP towards the passenger side about 1/16") but it didn't seem to make much difference. Any recommendations or ideas?

Edit: I just went out and messed with the timing again. The IP is kind of hard to turn so I loosened the fuel lines leading out to the injectors hoping this would help. Well, it was kind of hard to start, died a few times when I tried to start off in second gear (it's got a T19 with first being a granny gear), and seemed to have no power, as well as the engine seemed to be throbbing. But it seemed to idle alright and only put out a tiny bit of smoke, and when I turned it off it would start right up again. Hmm. Oh! I forgot to re-tighten the fuel lines! I did that and now it runs great; only a little smoke and plenty of power. I only took it for a short run, though, not even enough to get it warmed up. If anything happens I'll post it, otherwise, I think I solved the problem, hehe. Not sure why the first time I moved the pump didn't do anything, but I'm glad I tried again.

Last edited by N3M0H45; 10-15-2014 at 05:28 PM. Reason: Problem Solved.
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Old 10-15-2014, 05:42 PM
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The white smoke is vaporized unburnt fuel. You probably have some or all glowplugs not working. See the sticky thread at top of forum to diagnose.
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Old 10-15-2014, 08:08 PM
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If they put the pump on wrong it could be a tooth off. Start by having it timed with a meter. BB codes are not bigger than E codes.
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