Smoke...Injection Pump?
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Junior User
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From: Tenn
Smoke...Injection Pump?
My '91 E350 7.3 started smoking a lot on start up(blue/white) and black smoke after getting really warmed up....also running rough...I checked each injector by cracking the nut and each one made a difference in the running so I'm assuming they are okay...also installed a new fuel filter...what's next to check...pump?
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From: Prince George, B.C.
all 3 of ours smoke white on startup but don;t lost antifreeze either, they also smoke blue and lose oil but the one is leaking more then its burning I think If here is black smoke and rough running check and see if the advance is stuck, or if the cold start advance is staying on.
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Black smoke is from incomplete combustion. Blue smoke is from oil. White smoke is from water.
On startup, you might have some condensation in your exhaust...that will come out as white smoke. If you get white smoke all the time...you might be losing coolant.
Blue smoke is from oil burning.
I installed a new engine in my truck 30,000 miles ago and the exhaust is basicly clean. I get a little black smoke on startup as the engine is cold and the diesel is not combusting well.
Good luck,
BigBlue2
On startup, you might have some condensation in your exhaust...that will come out as white smoke. If you get white smoke all the time...you might be losing coolant.
Blue smoke is from oil burning.
I installed a new engine in my truck 30,000 miles ago and the exhaust is basicly clean. I get a little black smoke on startup as the engine is cold and the diesel is not combusting well.
Good luck,
BigBlue2
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From: Tenn
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From: Northeastern Pa - USA
The white heavy smoke is usually raw fuel, not sprayed into the cylinder or a cylinder does not have the glow plug working properly. The blue smoke is probably oil getting by valve seals or siting on top of the piston from blow-by. The black smoke is lots of fuel trying to get burned and may be caused by the advance piston being hung up inside the bore. The advance piston is on the driver side of the pump down low. It has a little fulcrum on it to make it move when you floor the accelerator. The problem is you cant see it due to being inside the pump. Check the air filter first and see if it needs replacing. Hope this helps.
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From my experience, the injection pump usually needs very little maintenance, provided it was set up correctly by someone that knows injection pumps. It's not the kind of "shade tree" operation you can perform on a gas carburator. My advice is that if you're not set up to do the calibration and adjustments...then leave that to an expert. It's worth the price of admission.
Also, I have been getting anywhere between 75,000 to 125,000 miles on an injector pump. If you have somewhere in the neighborhood of 100,000 miles on the pump and injectors it nearing time for replacement.
BigBlue2
Also, I have been getting anywhere between 75,000 to 125,000 miles on an injector pump. If you have somewhere in the neighborhood of 100,000 miles on the pump and injectors it nearing time for replacement.
BigBlue2
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From: Tenn
My E350 has 127,000 miles on it so I guess it might be time for a inj pump....though I checked the injectors using the loosing the nut method, should I also pull them out and have them checked by machine? Thanks for all the advice, this is a great forum.
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Originally Posted by 351M
360,000Km is about what guys expect up here in Prince George, thats when you add 2 stroke oil to the fuel in the winter to lube the pump etc.
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From: st. cloud,mn
i work on theese pumps, white smoke-not enuf fuel or its just cold, black smoke is to much fuel but there are other factors, 126k well i would say its time to fix the pump i'm guessing your advance bore inside the pump is worn- thus cuasing the smoke issues and running ruff, do you have a diesel shop nearby?? cuase there are ways to tell if the pump is bad or not with out pulling it off!!
tom
tom