Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

Heavy Smoke And Knocking Noise

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Old 02-13-2007, 01:12 PM
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Heavy Smoke And Knocking Noise

Just Put New Glow Plugs, Glow Plug Controller, Injector Pump And New Return Lines. Now It Smokes Real Bad When It's First Cranked And Continues To Smoke While Driving Down The Road. It Would Only Smoke When It Was First Started Before I Replaced All These Parts. What Would Cause It To Smoke All The Time Now. Also It Started Making A Knocking Noise When You Are Driving About 60mph Or Rev The Engine Up. Can't Tell If It Is Coming For The Bottom End Or The Top End But Sounds Like It May Be In The Top End. Will Not Make This Noise While It Is Idling.
Any Suggestions?
 
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Old 02-13-2007, 01:30 PM
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Sounds like you broke off a tip on one of your old glow plugs and it inside the engine.. time to take off the heads
 
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Old 02-13-2007, 01:42 PM
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No All Of The Glow Plugs Are Fine. I Rechecked The New Ones And The Old Ones Were Intact Also.
 
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Old 02-13-2007, 02:14 PM
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sounds like a fuel knock new pump and old injecters sometime will cause the old parts to break too much psi for the old to take
 
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Old 02-13-2007, 04:07 PM
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could it have something to do with the timing? i think my mechanic said he changed the timing on it. would that cause it to make a knocking noise? i know it would cause it to smoke if the timing is off.
 
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Old 02-13-2007, 06:47 PM
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Id bet my money on timing. Its injecting either too late or too soon, which makes the knock noise from improper combustion, then the unburnt fuel is spent out as smoke.
 
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Old 02-13-2007, 09:18 PM
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What color is the smoke?
Does the engine sound like a Power Stroke motor?
 
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Old 02-13-2007, 09:29 PM
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How many miles on your injectors? Old injectors open at lower pressure, (early) retarded timing = unburned fuel = white smoke. Also old injectors will not pop as they should, so fuel pours in instead of spraying, with a new IP behind them again unburned fuel, white smoke. That would be my guess!
 
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Old 02-14-2007, 03:19 AM
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It needs to be timed. Loosen the IP hold down nuts and turn the ip to the right (drivers side) about 1/16-1/8"
That should get it drivable, until you can find a good shop with a timing meter.
Did you remove the IP gear cover, or just the IP?
 
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Old 02-14-2007, 06:58 AM
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fuzzy, who did the work? and how did they r/r the pump? Does it start hard?
sure sounds like timing to me.
get us more procedure info on the repairs.
 




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