blue and white smoke on cold start
i live in new york and its been getting pretty cold at night and i park the truck fpr about 9-11 hours a night before driving again. when i cold start it with the grids on it starts up in a half click, but rough idle and lots of blue/white smoke. this only started happening since it got cold and i have a feeling bad lift pump may be causing this too. brand new fuel filter last week and when doing a w.o.t pull on the highway (with h1c rightnow) it hits 20-psi for about 5 seconds and then falls off to about 10 engine bogs and sputters. what the hell is going on??
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Drop off in boost and the engine "bogging down" at highway speeds is a hint that the lift pump is going.
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Would lift pump to cause back fire and blue smoke when i floor it? Thats what happens when i said it bogs down an boost falls off
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Lose power..backfire..blue and black smoke will come from the exhaust - JustAnswer
I found this online, try the link above. I know it's showing a newer Cummins engine, but its worth a shot. Hope it helps! |
Well i gradually rev-ed the truck up to 2200rpm and it blows alot of white smoke and sputters an back fires. Please tell me this is a. Sign of a bad lift pump and not a gauged cam like i have been readig
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Wish I could man, I just don't know enough about it to be able to tell you, but maybe someone else will chime in and help you out a bit more.
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run a temporary fuel psi gauge into the cab and see what the fuel pressure is at WOT
---AutoMerged DoublePost--- My truck was doing the same thing so I replaced my lift pump but it didn't fix the problem. I dropped my tank and found that the screen on my pickup tube had collapsed and sucked into the line thus reducing flow. Just something to check before you but a lift pump |
Ill check that tonight
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It's normal for one of these old trucks it should clear up and smooth out once it gets the cylinder temp up
---AutoMerged DoublePost--- On the high way it sounds like ur lift pump goin or slipped timing |
How would the timing slip? Never had the case open and runs mint until higher rpms and when boost comes up demanding more fuel i feel like it is because of fuel pressure droppin to low
---AutoMerged DoublePost--- bump please help!! ---AutoMerged DoublePost--- the same problem i have!! |
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