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Justin Spring

24 valve cold start smoke/wonky fuel pressure

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Hey fellas, I'm just wondering if this is normal or if I have a sticky injector or something. 

It only smokes on cold starts when it is not plugged in. It goes away after a couple minutes once it warms up a  it. 

When it's plugged in it just does its normal puff of black then no smoke and it does the same when it's a hot start or when it's above zero outside. 

I've also noticed that the fuel line on number 6 where it goes into the head looks damp with fuel. The fitting is tight which leads me to believe the connector tube o-ring is going/gone and if that could be the cause of the smoke. The smoke does not smell like oil, more like burn your eyes rich fuel. 


Also my fuel pressure gauge will bounce around when crusing/idle but when I'm WOT it'll hold a steady 14-15 psi then it'll go back to bouncing around. My guess is there's getting air in the system and think it might be that connector tube o ring. 

Truck is a 98.5 24 valve, 75 hp DDP injectors ( might be 100's but pretty sure they 75's. Can't remember haha) S.O. vp44, Fass 150, hx40. It also has just shy of 423000km with zero blow by, doing the oil cap flip that is if that makes any difference. 

here is a video. Was a -18°C cold start not plugged in showing the smoke I'm talking about. 

Thanks in advance for any input! 


Edited by Justin Spring

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2 minutes ago, Me78569 said:

I wouldn't be too worried. 


Are you running 2 stroke? Any codes? Are your grids cycling on and off?  


Do you have a pressure isolator on the fp gauge?

Yeah I'm runnin 2 stroke. Bout a qt 2stroke to every fill up of 100 L of diesel. Grids are cycling on and off. Zero codes. All I have to compare it too is my Dads 07 and that thing doesn't smoke at all. But it's bone stock. 


I have just a "restrictor" fitting on the hose from the vp to the pressure sensor. It used to be fine, and now it starts bouncing around randomly.  

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Mines cold smoked ever since I've owned it, for19 yrs been running every work day since October 1996. This on my 1st gen 92 truck

My 24 valve does it too.

Edited by JAG1

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Basically the white smoke is from the cold cylinder temperatures. Even mine smokes a bit as its started but once the cylinder temperature comes up the smoke is gone.

Even the fuel pressure is a bit jumpy on my truck till the fuel in the tank warms a bit then it settles down. I'm also up in the cold country with minus temperatures.

Edited by Mopar1973Man

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