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- Oct 26, 2015
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Smoking mainly when cold is often injectors or from a long cranking to get the fuel system re-primed.
What other cause could there be?
Here's my experience...
It was obvious I needed to replace my injectors. Uneven running was one symptom. Hard lope from the injectors unevenly applying. And it was getting worse. To the point where it almost seemed like some cylinders were battling each other.
But... No smoke. Not even at startup. None on hard acceleration. Etc. I had plenty of smoke when I first got it, but had eliminated the problem by adjusting the IP timing.
So... I replaced the injectors with some from one of the approved vendors here.
No more lope. (Except on a cold morning, when I have to use the GPs for a longer time. I am assuming that means I need to replace the GPs, because some must not be working.)
But, now I have tons of smoke at startup.
No long cranking times. It starts up pretty quickly.
I have adjusted the timing, in both directions. Result in both directions was worse smoke, and bad running. So my timing is now set back at what is obviously the best for this engine. (No idea what that is, because I don't have any of the timing equipment.)
Smokes only at startup, and up until it is well warmed up. After that, no smoke at all. Not even on hard acceleration. Acceleration is smoother and stronger with the new injectors. Better throttle response. Better hill climbs. It just runs better overall, with the new injectors.
Still... That is a LOT of smoke at startup. The entire neighborhood gets a blanket of white smoke...
I trust these injectors. I trust the vendor. So I am trying to figure out what else could be the cause.
One thing I am considering trying, is unplugging the fast idle at startup. The weather is warm. It's the best time to try such a thing. I suspect it isn't going to make any difference. (Or simply won't stay running on it's own.) But we'll see.