Hey all, drove my ‘01 4.0 to work yesterday and got gas from a gas station right next to my work. the trip from the station to work was fine but when i got off, i went to go start my truck and it started but almost had the sound of a bearing that had gone out. I popped my hood and as i went to go shut it off it died before i could reach the key and didnt want to start. I had it towed home and we’re guessing maybe bad fuel? we got it to start but it barely starts and idles and smells heavily of fuel. pulled the fuel filter off and the fuel that was coming out of the outlet side was straight black after turning the key over a few times to prime it to pump more fuel out. exhaust also sounds deeper when it starts. any ideas?

Here is a video of fuel and startup: https://youtu.be/4UfFYh_cCIE

 

Yes, definitely some dirty bad gasoline

Let the fuller bottle sit for a few hours and see how it separates

Pictures here: https://i.ytimg.com/vi/9Z6IoogVdRQ/maxresdefault.jpg
On the left is bad gas, too much water, gasoline is lighter than water so floats to the top
On the right is not great but would work with no issues in most vehicles

You can jumper the fuel pump relay in engine fuse box to pump out the rest of the fuel, or siphon as much as you can with a hose, then pump out the rest

If you have a full tank you can put drained fuel into containers and then let it sit for a day or two and siphon/pour off the "good gas" from the top so its not a total loss
Whats left is a good weed killer, lol



All gasoline has some water in it, it comes from condensation in refinery storage tanks and transport truck tanks and the gas stations under ground tanks
Water will slowly sink to the bottom of these tanks so they all have "water traps" which are drained periodically
But when refilling these tanks, especially the gas stations tanks, it can stir up the water at the bottom which then takes a few hours/day to settle back out

General heads up is if you see a tanker refilling gas station tank, ask what grade of fuel is going in and then DO NOT use that grade at that time, lol
Gas station has no way to tell if it has bad gas, so let them know what happened and take that bottle in to show them, its possible they will compensate you, especially if there were other complaints
But they have no way tell if it was their gas or if someone was mad at you and put some water in your tank, lol

 

just drained tank and changed the fuel filter and its doing the same thing. i noticed itll start and the oil pressure gauge goes to normal but then drops back down to 0. not really sure whats going on now

 

Doing the same thing?
And it will start?

Injectors could be clogged up, blocked screens

So it will idle OK, but oil pressure gauge will drop to 0 while its idling?
Any ticking noise when oil pressure gauge drops to 0?
That means there is actually low oil pressure

Oil pressure gauge uses a 6psi switch, on or off
Above 5psi and switch is closed and gauge shows just below 1/2 or so
Under 6psi and switch is open and gauge shows 0

If you raise RPMs does oil pressure come back on

 

Nope it wont idle. It still is very rough to start and barely idles for maybe 5 seconds before the oil pressure gauge drops to 0 and the engine dies.

 

When RPM drops below 500 to 600 oil pressure gauge will go to 0, oil pressure is still there, just under 6psi

I would pull off the air tube from intake and manually add fuel to engine for start up and to keep it running, gasoline is spray bottle or quick start(ether)
If you can keep it running that way then you have a fuel delivery issue