White smoke & pop/miss
04-22-2017, 02:41 AM
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White smoke & pop/miss
Ok so I'm having a problem that has me a bit worried. If I free rev over the past few days it will just give me a small amount of black or gray smoke followed by a lot of white & popping like a miss.It only does this when parked & I rev it.It has never done this before.I almost think that it is running a little different but can't say for sure. I Know my fuel filter is past due on change & I have a fuel leak @ my fuel filter housing not sure if it's the banjo bolt or if the filter head is cracked. But it's a 97 but I bought the 94-96 conversion kit from pure diesel . I've been meaning to install but I've been in & Out of the hospital. Dosn't really have smoke after start up or while driving. I have power that's not a issue. It's not throwing any codes starts right up.No coolant loss no signs of a blown head gasket.No wild or erratic RPMs will check injectors today& fix fuel leak if that dosn't help after the filter & etc where should I start? My p pump is stock I would hope I wouldn't have a bad p pump or burnt valve low comp etc.If timing has jumped how could that have happened? Thanks in advance.Sorry really has me worried I have had a horrible time for a bit now.So kinda freaking out . Really not even up to working on it due to health but oh well . Please forgive my poor grammar & punctuation.
04-22-2017, 10:02 AM
#2
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If it doesn't do it under load I wouldn't worry too much about it. Could check fuel pressure, could narrow it down to a dirty filter, weak overflow valve, or weak lift pump. Some healthy running trucks do this anyway though.
04-22-2017, 10:11 AM
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Usually If I idle & then rev it, it will blow Thick black smoke but now when I do it, it does it like it would cold in the winter with the back firing sound &raw fuel smell.Just smelled exhaust eyes watered from the smell of raw fuel.If I rev it.Isnt that considered underload?
04-22-2017, 12:42 PM
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Generally on a P-pump equipped truck, that's either late timing or low fuel pressure. If you know you have a fuel leak, I would get that fixed up before looking at anything else.
04-22-2017, 09:29 PM
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Sitting in idle is not under load....Load meaning accelerating the truck or pulling weight up a hill. If it runs good under those circumstances I wouldn't worry about it much. They aren't meant to fuel heavy with no load on the engine, not saying there isn't an underlying issue. Fuel pressure would be first thing to check, 17-20ish psi at idle and 30-35 psi at higher rpms is good.
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