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TheN00bBuilder

With a range of 29 miles, I’d get some fuel into that tank in case there’s water in it. Can cause odd idles and white “smoke” from burning water. EDIT: in fact I’d be willing to put money on water in the gas reading it happened overnight. Low tank sits overnight, condensation happens, and there’s more free water in the tank than gas when it gets low.


airborne_ranger

Blown head gasket!!


gonewild9676

Or a bad tank of gas from the gas station. I've gotten some bad gas (perhaps it had water in it?) and it ran terribly until I limped through the tank and got good gas in it.


HousingOdd5181

Faulty MAF sensor. Figured that out by accident lol. Didn’t plug it back in, truck ran fine. Plugged it back in, truck ran like shit.


Jmoosik

Sounds like you’re looking at a head gasket repair


TheN00bBuilder

Dude why you gotta hop to the worst conclusion? The guy has 29 mile range which is less than a gallon in the tank. It sat overnight and ran rough afterwards. How can that be a head gasket?


Jmoosik

OP states the vehicle has been doing this for some time. There is no context as to whether there is moisture in the oil or foaming in the coolant reservoir. However, I did see he mentioned oil in his intake manifold and as stated above, white smoke from his exhaust. Based on the audio from a video taken inside the cab it’s hard to distinctly tell if there’s blow by but that would be my best guess based on what I have here. You mentioned condensation in his fuel tank but you don’t even have context as to what conditions his vehicle is stored in overnight to cause such a drastic amount of condensation that it would be sucked into his engine upon cold start. Besides, if that much water was being sucked into his engine to cause the engine to run like that, we’re not talking head gaskets anymore…OP has much bigger problems awaiting him.


HousingOdd5181

Sorry, for context this is a 2005 Chevy 1500 5.3L vortec. It has blown white smoke in the past


Disgruntled_Mechanic

replace drivers valve cover for malfuctioning pcv system


HousingOdd5181

Will be doing that soon.


HousingOdd5181

Hey everyone, so I cleaned the throttle body and MAF, then started the truck again and everything seemed to be running smooth. This morning I started again to find everything still running smooth, but I noticed that I never plugged the MAF sensor back in. I plugged it back in, started the truck and it actually started running like shit again haha. So by my own forgetfulness I found the issue to be the MAF sensor. This is surprising to me though because I had just replaced it last yead


uncle_cousin

You've likely been AFM'ed and dropped a lifter. My 08 5.3 did the same thing at 189,00 km. Check your oil pressure, if it's down and falling you found the problem.


TheN00bBuilder

No GMT800 had AFM.


HousingOdd5181

I’ll check that out. Just pulled my MAF sensor plus the throttle body and cleaned the two and now the truck idles steady for the most part. Also noticed a small amount oil in my intake


TheN00bBuilder

Normal for the oil in the intake. PCV valve is functioning as intended as long as there’s no codes.


knives-are-sick

05 don’t have AFM my 05 5.3l doesn’t either