White smoke startup 6.5

[bdhailey]

My 2005 1123 has heavy white smoke at start up then goes away when warm
Already replaced injectors, glow plugs, advance cold start solinoid and glow plug controller on manifod
Ideas
Thx

 

[MarkM]

Does she start right up or does it take time cranking?

What is the glow plug light doing during the startup procedure?

If she take her time starting when it's below 60 outside then that is an indication of a start/glow issue. I see you replaced everything but did you test the system on starting? This will let you know if the glow plugs are being energized for the right time and then go into an afterglow mode. Please note not all control boxes have an afterglow mode.

When I was fighting with mine the glow light worked fine had just replaced the glow plugs only to find out the solenoid in the box just kept the 24v on to the new plugs and fried them.

Below is a quick video on how I tested my system.

Mark

 

[Thumper580]

The injection pump timing could be off (are the hash marks on the IP and the flywheel lined up). Did you replace the control box (smart start system box) with all the other new stuff? Those are all the basic first maintenance items. New fuel filter ?

 

[Mogman]

Welcome to the forum!
Like Mark said above it sounds like you are still having some glow plug issues, better to actually troubleshoot rather than just replace parts.

 

[Hummer Guy]

I have to agree with the others, this sounds like a glow plug issue, have you checked your PCB box?

 

[bdhailey]

Does she start right up or does it take time cranking?

What is the glow plug light doing during the startup procedure?

If she take her time starting when it's below 60 outside then that is an indication of a start/glow issue. I see you replaced everything but did you test the system on starting? This will let you know if the glow plugs are being energized for the right time and then go into an afterglow mode. Please note not all control boxes have an afterglow mode.

When I was fighting with mine the glow light worked fine had just replaced the glow plugs only to find out the solenoid in the box just kept the 24v on to the new plugs and fried them.

Below is a quick video on how I tested my system.

Mark

Starts right up just pulled all glow plugs tested with battery then checked continuity then checked 24 volts at plug leads all good
75 degrees outside started smoke 15-20 then cleared and ran great 500 miles on motor bought at 100 no problems til 450

 

[bdhailey]

Starts right up just pulled all glow plugs tested with battery then checked continuity then checked 24 volts at plug leads all good
75 degrees outside started smoke 15-20 then cleared and ran great 500 miles on motor bought at 100 no problems til 450

Glo plug light on for few seconds then off then start

 

[bdhailey]

The injection pump timing could be off (are the hash marks on the IP and the flywheel lined up). Did you replace the control box (smart start system box) with all the other new stuff? Those are all the basic first maintenance items. New fuel filter ?

Thx
Have not replaced control box yet working that way have not checked timing but would it not smoke all the time if timing off Sounds like it misfires a little while smoke clearing then no more after smoke cleared
Thx

 

[Mogman]

Use a volt meter on one of the glow plug wires, SEE if the glow plugs get power while the wait light is on.

 

[MarkM]

Use a volt meter on one of the glow plug wires, SEE if the glow plugs get power while the wait light is on.

Yes exactly.

Mark

 

[Milcommoguy]

Even with one bad glow plug, one can get a puff or two of smoke. Two plugs bad and cold, say 50 degrees, Puff Puff or three with a little more white smoke. Simple test is to be familiar with the dash voltmeter. 50 degrees , first time cold start, all plugs heating and with strong batteries...voltmeter will / can take a dip into the red when energized. This assumes all systems go.

IMO timing marks... There is a bit of leeway. Sure properly timed and tuned is the way to go. A lot is going on in the pump. Rusted, busted and gummed up pumps on so called "new low miliage trucks" is nothing new.

Having a microcontroller in a HMMWV "box" just compounds trouble shooting to a new level. 500 mile truck can have 30 year old electronics.

Dash voltmeter is your friend . Learn its response to glow plug action.

Your buddy to dumping the box is Camoteksystems.com CAMO

 

[papakb]

I had a problem with a failed cold advance switch that did exactly what your describing with white smoke that goes away as the engine warms up yet it still started OK. Right rear of the engine block easily accessed by removing the inside engine cover.

 

[Gamble]

I had this issue until I replaced the control box. Truck would start after a few cranks but I would get lots and lots of white smoke. Troubleshot everything and it boiled down to the control box. I replaced that and the smoke was gone.

 

[bdhailey]

Use a volt meter on one of the glow plug wires, SEE if the glow plugs get power while the wait light is on.

checked all 8 plugs getting 24 volts with wait light on

 

[bdhailey]

checked all 8 plugs getting 24 volt

 

[papakb]

bdhhhailey, +24 volts isn't an indication that your glow plugs are any good. only that they're getting voltage. Measuring resistance is the only good way to test them.

 

[bdhailey]

I had a problem with a failed cold advance switch that did exactly what your describing with white smoke that goes away as the engine warms up yet it still started OK. Right rear of the engine block easily accessed by removing the inside engine cover.

View attachment 885477View attachment 885478

checked it works per manual
thx

 

[bdhailey]

bdhhhailey, +24 volts isn't an indication that your glow plugs are any good. only that they're getting voltage. Measuring resistance is the only good way to test them.

checked resistance all at2,5

 

[bdhailey]

checked all at 2.5

 

[bdhailey]

all resistance 2.5