Can a bad valve cover gasket injectors wire harness cause white smoke during start up - Dodge Cummins Diesel Forum
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post #1 of 31 (permalink) Old 09-17-2019, 07:45 PM Thread Starter
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Can a bad valve cover gasket injectors wire harness cause white smoke during start up

I’m having white smoke puff (A lot)in the morning on my truck after I changed all six injectors still.. a lot of people are telling me it could my my wire harness to my fuel injectors? I never replace the wire harness btw I used the same one

2006 Dodge Ram 2500 5.9

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post #2 of 31 (permalink) Old 09-17-2019, 08:11 PM
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No . That would give you a rough running condition .

What injectors did you install , and were the feed tubes new ?

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post #3 of 31 (permalink) Old 09-17-2019, 08:31 PM
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Was it doing this before you swapped injectors?

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post #4 of 31 (permalink) Old 09-17-2019, 09:34 PM Thread Starter
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Yes it was smoking slightly before I installed the new injectors but now it’s puffing white smoke like crazy only when the engine is cold but it’ll be running good when it’s in running temps.. I keep getting told it’s my wire harness.. and yes it has new feed tubes
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post #5 of 31 (permalink) Old 09-17-2019, 09:39 PM
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Compression....... is it a raw fuel smell from exhaust?
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post #6 of 31 (permalink) Old 09-17-2019, 09:43 PM Thread Starter
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Yes smell like fuel
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post #7 of 31 (permalink) Old 09-18-2019, 07:15 AM
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Could be wires. Pull the injector wire plugs at the valve cover and measure the resistance to the injectors there. If the wires are good, they should all match abd be less than 1 ohm. Found this on mine, the crimped end that connected to the injector was not tight and caused a wondering reading. Redid all the terminals and now all the injectors read the same whether I am at the injector or at the plug.

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post #8 of 31 (permalink) Old 09-18-2019, 07:20 AM
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Quote:
Originally Posted by cwendel View Post
Could be wires. Pull the injector wire plugs at the valve cover and measure the resistance to the injectors there. If the wires are good, they should all match abd be less than 1 ohm. Found this on mine, the crimped end that connected to the injector was not tight and caused a wondering reading. Redid all the terminals and now all the injectors read the same whether I am at the injector or at the plug.

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I would think a bad injector wire would cause a shudder or something like the power was being turned off and on. Not a haze dependant on temperature.
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post #9 of 31 (permalink) Old 09-18-2019, 07:30 AM
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Not sure. The system on these trucks is really primative compared to new gas vehicles. Kinda like being in the early 80's. The system does not seem to have hard set values and works even out of range so it could be adjusting for an injector solenoid that changes with temp. Easy way is measure the injector solenoid resistance through the harness connection. If it is less than 1 ohm and more than 0.1 ohm then that is not the problem. Just another box to check off, especially since these rams are so sensitive to electrical conditions.

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post #10 of 31 (permalink) Old 09-18-2019, 08:14 AM
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Quote:
Originally Posted by Aburdett View Post
I would think a bad injector wire would cause a shudder or something like the power was being turned off and on. Not a haze dependant on temperature.
Exactly .

Again , What injectors were used and if new feed tubes and O rings

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post #11 of 31 (permalink) Old 09-18-2019, 11:16 AM
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I would think a bad injector wire would cause a shudder or something like the power was being turned off and on. Not a haze dependant on temperature.
Not if the wire is not cut through. A broken wire can still make contact 90% of the time if it broke inside the insulation.

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post #12 of 31 (permalink) Old 09-18-2019, 11:19 AM
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Originally Posted by cwendel View Post
Not if the wire is not cut through. A broken wire can still make contact 90% of the time if it broke inside the insulation.

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Ya but would that cause white smoke? Id disagree. Seen half broke and broken injector wires on class8 trucks. All only caused on/off power. Or a miss. No white smoke or haze that went away.
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