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Old 05-20-2017, 04:36 PM
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jake12tech jake12tech is offline
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Join Date: Nov 2011
Location: Philadelphia, PA
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Quote:
Originally Posted by Diseasel300 View Post
This is more like a chipped Cummins rolling coal than the hint of smoke you're talking about. I don't mind a bit of smoke when really romping on it, but this smoke starts up ~1500 RPM and peaks around 2500 before trailing off. Doesn't matter if the turbo is spooled or not (turbo is spooling fine and reaching 13PSI). Backing off the pedal and then increasing throttle like climbing a hill in traffic will blanket the car behind with black smoke, especially until the turbo spools enough to compensate. Normal running doesn't do it nearly as bad. You can get a faint fog behind the car when romping from a stop sign.

Will the ALDA adjustment tune the entire fuel band? Or just the "on-boost" fuel band? Additionally, is leaning out the ALDA going to make the off-boost 500-2000 RPM range even more of a slug?

The smoke wasn't as bad with the old Bosch India injector nozzles, but the engine also didn't run anywhere as well or with as much power as with the new Monark nozzles that are installed now. I'd assume leaning up the fueling will have a direct correlation to fuel economy numbers as well. I currently get 26-27mpg in city traffic, but only 23-24mpg on the highway in 75mph interstate driving. I'd have expected that second number to be higher than it is, but running rich would certainly explain it.
It sounds like your injectors aren't tuned properly. Tuning the ALDA won't cut overall fuel, just on-boost fuel.

Either that, or your timing is advanced a few degrees too much. Have you checked timing?
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