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04-19-2020, 12:08 AM
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#1
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Name: Johnf350
Title: Rookie
Status: Not Here
Join Date: Oct 2019
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Posts: 12
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12v Cummins white smoke popping
Hi I have a 96 12v Cummins was running fine was driving at about 30 mph made a pop noise then all of a sudden lost power an started blowing white smoke I have a adjustable timming gear that’s keyed iv checked the timming just to be sure it set right which it’s at 25* has new industrial 5x22 injectors im getting fuel at the injectors when I crack the lines some an I have 50 psi reading on my fuel gauge getting hard to start an blow a lot of white smoke at idle an wont rev at all without popping also running rough doesn’t has a fade fuel system on it. Could the ofv be causing these issue any ideas an things to look for would be great
Last edited by Johnf350; 04-19-2020 at 12:17 AM.
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04-19-2020, 09:23 AM
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#2
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Name: RollCoal9000
Title: Green Behind the Ears
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Have you pulled the radiator cap to see if you're burning coolant?
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04-19-2020, 09:40 AM
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#3
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Name: Johnf350
Title: Rookie
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Coolant still same level an no oil or anything in it
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04-19-2020, 09:44 AM
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#4
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Name: Snedge
Title: Comp Diesel Sponsor
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Could be the Crank or Cam gear spun.
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04-19-2020, 09:49 AM
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#5
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Name: YoungDiesel27
Title: Never Enough Time
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Join Date: Jul 2010
Location: West Virginia
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Posts: 825
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I would be checking pin on the crank gear.
__________________
EFI Live, HP Tuners, Smarty custom tuning
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04-19-2020, 10:02 AM
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#6
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Name: Johnf350
Title: Rookie
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How would the crank or cam gear spin if the keyed?
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04-19-2020, 10:39 AM
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#7
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Name: Snedge
Title: Comp Diesel Sponsor
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Join Date: Sep 2006
Location: Western Pa.
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The over flow valve could cause the issue, easy enough to check. I figured anyone with an adjustable Cam gear would have the knowledge to check that, so it wasn't mentioned.
Keys are easily sheared. That's why many people tack weld the gear.
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04-19-2020, 10:50 AM
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#8
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Name: Bodacious
Title: Comp Diesel Sponsor
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Location: Weston, WV
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Posts: 2,177
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Quote:
Originally Posted by Snedge
The over flow valve could cause the issue, easy enough to check. I figured anyone with an adjustable Cam gear would have the knowledge to check that, so it wasn't mentioned.
Keys are easily sheared. That's why many people tack weld the gear.
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Yep, the first engine in Bodacious still has the crank gear welded just a smidge out of time. Lol
__________________
"Careful who you argue with on the internet. Others might not know they are idiots."
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04-19-2020, 01:53 PM
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#9
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Name: Johnf350
Title: Rookie
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Cam gear an crank gear all still in the proper timming
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04-19-2020, 02:09 PM
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#10
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Name: Snedge
Title: Comp Diesel Sponsor
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Join Date: Sep 2006
Location: Western Pa.
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Posts: 18,832
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How are you verifying that?
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04-19-2020, 02:31 PM
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#11
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Name: Johnf350
Title: Rookie
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Pulled front cover off keys are still in place an timming marks as aligned
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04-19-2020, 04:20 PM
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#12
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Name: Snedge
Title: Comp Diesel Sponsor
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Location: Western Pa.
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Posts: 18,832
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Timing marks don't change when gears spin. You may want to check valve positions vs. TDC.
Last edited by Snedge; 04-19-2020 at 04:23 PM.
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04-19-2020, 04:31 PM
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#13
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Name: 95cummins5.9
Title: Old man ***** gossiper
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Location: U.S.A
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Posts: 4,715
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It does it cold or warmed up? I'd send injectors out and also make sure your delivery valves have been lapped into the holders if they are aftermarket. Checked for boost leaks?
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Quote:
Originally Posted by jfaulkner
puzzy, tune it.
I don't own anything stock, from engines to boobies I've modded them all. Life is too short to live with mediocre chit.
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Last edited by 95cummins5.9; 04-19-2020 at 04:39 PM.
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04-20-2020, 06:45 AM
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#14
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Name: Snedge
Title: Comp Diesel Sponsor
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Join Date: Sep 2006
Location: Western Pa.
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Posts: 18,832
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Could have broken the camshaft also. I've seen those break along a horizontal path. It'll still spin, but throws of valve timing.
Please keep us updated on your findings.
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04-20-2020, 02:34 PM
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#15
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Name: Tate
Title: What?
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Join Date: Nov 2007
Location: Airdrie, Alberta
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Posts: 3,419
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I've had injectors get stuck open that made similar issues. I'd be pulling them and swapping in another set to rule them out.
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04-20-2020, 03:38 PM
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#16
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Name: Snedge
Title: Comp Diesel Sponsor
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Join Date: Sep 2006
Location: Western Pa.
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Posts: 18,832
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You could just crack injection lines one at a time and see if the smoke clears. I was keying in on the popping noise he mentioned that started the issue.
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04-20-2020, 10:53 PM
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#17
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Name: Ram12vcummins
Title: Too Much Time
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Join Date: Mar 2015
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Posts: 1,659
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12v Cummins white smoke popping
Quote:
Originally Posted by Snedge
You could just crack injection lines one at a time and see if the smoke clears. I was keying in on the popping noise he mentioned that started the issue.
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If the smoke don’t clear, a change in engine sound will help indicate a cylinder that might have trouble.
And I mean the lack of any change in sound.
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04-21-2020, 04:50 AM
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#18
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Name: Snedge
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Sep 2006
Location: Western Pa.
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Posts: 18,832
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Quote:
Originally Posted by Ram12vcummins
If the smoke don’t clear, a change in engine sound will help indicate a cylinder that might have trouble.
And I mean the lack of any change in sound.
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True, but I'm thinking we care more than him. Seems like he left.
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04-21-2020, 06:24 AM
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#19
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Name: Ram12vcummins
Title: Too Much Time
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Join Date: Mar 2015
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Posts: 1,659
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Quote:
Originally Posted by Snedge
True, but I'm thinking we care more than him. Seems like he left.
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Maybe the motor had enough trouble shooting. Lol
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04-21-2020, 06:38 AM
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#20
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Name: Snedge
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Sep 2006
Location: Western Pa.
Member`s Gallery
Posts: 18,832
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Quote:
Originally Posted by Ram12vcummins
Maybe the motor had enough trouble shooting. Lol
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I hate it when people come for ideas, I take the bait, but then there is no "this is what I found". Anyone else who reads this in the future will find a dead end.
John, if you come back, please make us whole.
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