Stalled. Fuel Pump?

[BackToBlack]

Was driving the other night and my 2006 Chevy Tahoe lost power steering and ability to accelerate. While sitting on the side of the road, it wouldn't turn over. Would crank, but would not start. Got towed home and next morning it started right up but wouldn't make it around the block without dying on me again. Tried starting it after that, would crank and have a really rough start then shut off immediately.
It's now been at the dealership for 3 days, they "can't find anything wrong"
I'm getting -evap emissions system leak detected code- with my engine light.
They say that code would not cause the Tahoe to fail while driving.

PS- have noticed a popping noise coming from gas tank for the past year after the truck is sitting for a few minutes after driving. Sounds like a paint thinner can popping.


They claimed to have checked "everything"


Any thoughts?


I initially suspected the fuel pump but after much reading, I'm now thinking it could be anything from the fuel pump, fuel filter, vacuum lines, MAF sensor, o2 sensor, relays, fuses, ground connection for pump, etc.

Any help is greatly appreciated as I am at a complete loss for what is going on and have been racking my brain trying to figure out what the hell is wrong.

Thank you !

 

[bottomline2000]

They checked fuel pressure at the rail? Make sure your temp sensor is plugged in. That thing can wreak havoc on drivability. Sounds like a fuel pump issue.

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[Chip18]

Hmm, well the dealer has had it three days and can't find anything wrong??? Did they happen to add in "They all do that."

But on a serious note ... did you happen to take note of the fuel level in the tank when the issue happens?? 1'2 a tank or more and could be vapor lock??? I've never had that happen but I've never had a vehicle doing the "popping thing" from the gas tank either??

If it's at the dealer and has a low fuel level in the tank?? Then giving them the benefit of the doubt ... maybe the issue won't show up?? In anycase take a look at these clips and see what you think.

 

[BackToBlack]

Hmm, well the dealer has had it three days and can't find anything wrong??? Did they happen to add in "They all do that."

But on a serious note ... did you happen to take note of the fuel level in the tank when the issue happens?? 1'2 a tank or more and could be vapor lock??? I've never had that happen but I've never had a vehicle doing the "popping thing" from the gas tank either??

If it's at the dealer and has a low fuel level in the tank?? Then giving them the benefit of the doubt ... maybe the issue won't show up?? In anycase take a look at these clips and see what you think.

First of all thank you for the speedy reply!
That second video is interesting. I'm definitely leaning toward purge solenoid after seeing that info...

The Tahoe has 3/4 of a tank when I dropped it off. It just started having the issues.

And as for the popping noise, I'm guessing that's something with the emissions system's inability to vent properly, possibly what's causing the stalling. Again, crazy theories don't seem so irrational when all the basics have been covered...

 

[BackToBlack]

They checked fuel pressure at the rail? Make sure your temp sensor is plugged in. That thing can wreak havoc on drivability. Sounds like a fuel pump issue.

Sent from my SAMSUNG-SM-G900A using Tapatalk

They did not say if they checked it or not. I'm going there tomorrow to deal with it so I will be sure to ask about the fuel pressure and the temp sensor as well.
Can you please explain what the temp sensor is and how it would be effecting my vehicle in this manner?
Thanks in advance!

 

[BackToBlack]

Some more possible useful info-

The gas cap is actually loose. Has been for a long time now. Additionally, i tend to "top off" my tank when I fill up most of the time.

1. In regards to the fuel cap- any way this faulty seal could've allowed enough moisture in to the fuel system to get water in my tank/lines? (Far fetched, I know, but I'll try anything at this point...)

2. I read that topping off the tank can allow gas to get into some of the vent lines or vacuum lines? Could I have somehow ruined the vent valve by doing this time and time again?


This is my first thread here and you guys have been great. Thanks again!

 

[Chip18]

I'll defer to the clip on the Evap system I linked! One of those "Black Box" mysteries for me, that as long as it works ... I don't care.

But that said the "Popping noise" and you say you always fill it up ... it sounds like an "issue/failure" with that system (Evap) to me???

 

[BackToBlack]

Chip, I am thinking the same thing. I asked about the codes and the service tech I'm working with said "yeah we saw them but they would have no relevance in why it is stalling out"
Sounds like they might not know what they're talking about....or am I gravely mistaken?

 

[BackToBlack]

I'll defer to the clip on the Evap system I linked! One of those "Black Box" mysteries for me, that as long as it works ... I don't care.

Exactly- if it's fixed, it's fixed. No questions asked

 

[Chip18]

Chip, I am thinking the same thing. I asked about the codes and the service tech I'm working with said "yeah we saw them but they would have no relevance in why it is stalling out"
Sounds like they might not know what they're talking about....or am I gravely mistaken?

Most likely ... they have never seen a "Vapor Lock" situation before???

To be fair seen I have been dealing with FI motors ... I have not seen that issue either??? But the "popping sound" from the rear?? The only thing that makes sense is an "Evap Issue" and the vehical "said" that was the issues! It sounds like you don't have emissions testing where you are?? I was a smog tech a very long time ago and I'm gonna guess your not in Ca???

If you were and "speculating" as I was a smog tech back in the day. I would suspect that your vehical would fail and high HC's (unburnt Hydrocarbons) would be the issue??

The "fuel vapors" just aren't being dealt with properly in my "opinion." That is just my "opinion" based on the "popping sound" because ... "No ... in fact ... they don't all do that.