Hello all,
the other day I was driving to work and 30 mins in it started making a loud humming noise. It’s already a pretty noisy truck but I could definitely hear it get louder. On my way home it was fine and then I hit traffic, it wanted to stall out and my rpm’s were going below 500. I had to keep hitting the pedal to stop it from stalling. And when I was able to keep moving it kept stuttering. I’m just confused by this. I bought it two weeks ago for $800 and it ran beautifully beside it didn’t want to start after I shut it off, unless I waited 20 mins. Anyone have any ideas?

 

You need to determine if it is losing spark or fuel when the engine dies. Use an old spark plug or see if the engine stall is fuel related by trying some starting fluid and see if you get any more activiity out of it.

Fuel pressure should be 30-45 psi.

 

Check the obd2 codes with a scan tool
Check the fuel pressure
Find a fuel pressure gauge you can add enough hose to, so you can watch the gauge as you drive
Stalling at idle could be just about anything
EGR valve sticking, TP failing, IAC not working
Checking the codes and the fuel pressure is where to start

 

So I believe I might have found the problem…

Don’t know if this what would cause it but decided to look under the truck today and saw this

 

Seen that before. Let us know what you end up doing about it.

 

The stalling and low RPMs might point to a vacuum leak, bad idle air control valve, or a clogged fuel filter. The humming noise might be related to the fuel pump, especially if it's louder than usual. The fact that it has trouble starting after shutdown could also suggest a failing fuel pump or a problem with the ignition system.

 

I have this exact same issue, engine stalling out while sitting in traffic after a longer drive and after I cut off the engine I have to wait about 10-20 minutes before starting it or else it’ll just die. What was the fix for you?

 

When it happens, check for spark. Check for codes as well.

 

I’ve had P0171 and P0174 for the length of this problem, recently got P1150 and P1130. Should I check for spark on a single plug or check each one?

 

It might help to start your own thread with all you have! I would start with verifying fuel pressure and check for spark on any wire, don’t really matter. Also, go through all vacuum hoses looking for broken ones. Do you have any broken exhaust or gaskets before the first O2 sensor?

Keep a fuel pressure gauge with you. The pump could be starting to fail. A symptom is losing fuel pressure especially when sitting idle,slow speeds. The pump is getting hot and dropping. I recently had something like that.

Dual tanks? If so, does switching tanks allow you to start again?