Possible fuel pump failure??

[jeremiahm]

Mine was giving me intermittent issues a couple of weeks ago. Would stall at stop lights, hard to start back up, then fine for a day or two. Pump was a bit loud and I had changed all the ignition parts in the last few months. Put in a new Delphi pump and runs as it should. I was at 160k miles and have put 1200 on since the new pump.

I did cut the floor for my replacement instead of drop the tank, if you are interested: https://www.tahoeyukonforum.com/thr...g-solved-fuel-pump.128547/page-4#post-1601199

Jeremiah

 

[OR VietVet]

Yeah, probably need to do all of that.

If you want to keep the vehicle and don't change components when recommended, it will bite you in the ass eventually.

My dad used to call that breakdown maintenance instead of preventative maintenance.

 

[swathdiver]

Yes, tuners can see fuel pressure on a 2009. There's an off chance that the cats are clogged but not likely. Fuel pressure shouldn't drop more than a pound or two when you get on it. Post up your Long Term Fuel Pump Trim if you can see it. Mine's getting long in tooth, bounces between 1.5X and 1.4X.

 

[09_4WD_YUKON]

Well, as I figured, it left me on the side of the interstate otw home from work. Just ran HP Tuners on it, at idle fuel pressure is 42-43 psi, but when you give it some gas it drops to 7-8 psi. And get these....

 

[09_4WD_YUKON]

at idle....

 

[09_4WD_YUKON]

 

[wsteele]

Sure looks like a new fuel pump is in your very near future.

 

[Doubeleive]

hopefully it's not on a full tank

 

[swathdiver]

hopefully it's not on a full tank

23.9% fuel on board. Well, she gave you a little notice at least.

 

[Geotrash]

Use an OEM pump only.