97 Yukon - No Start

[aweber]

I have a 97 Yukon which stopped running on me while driving.

When I spray starting fluid in the TB, it will run, but quit when I stop spraying.

Because of this, I assumed fuel pump, but after checking, I can hear the Fuel Pump relay click when I turn on the key, I can see that the Fuel Pump is getting power, and I can hear it running.

So not a pump or relay issue, what else to check?

The symptoms before it stopped running was that it was hard to start. Intermittently I had to spray starting fluid in the TB to get it to start, after which it would run fine.

Thanks in advance

 

[treepete]

hmmm do you have a fuel pressure tester? it may be running, but not achieving high enough pressure.. how are the injectors lookin? clean?>

 

[aweber]

hmmm do you have a fuel pressure tester? it may be running, but not achieving high enough pressure.. how are the injectors lookin? clean?>

I don't but I will borrow/buy one next to check pressure as a next step.

Do the fuel pressure regulators ever go bad on these things?

 

[treepete]

I havent seen that mentioned much here, but that doenst mean it doesnt happen.
I think you should borrow that tester real quick like and see what kind of PSI you got going on.
did this problem gradually set in? did you ever get a random stalling of the engine before it totally wouldnt start?

 

[aweber]

I havent seen that mentioned much here, but that doenst mean it doesnt happen.
I think you should borrow that tester real quick like and see what kind of PSI you got going on.
did this problem gradually set in? did you ever get a random stalling of the engine before it totally wouldnt start?

Yah, before it died I was driving at hwy speeds, the engine died for about 2 seconds then caught again running fine, then died completely 10 minutes later...

The hard starts came about about 1 month before it died completely.

 

[treepete]

give the gas tank a good thud with a rubber mallet and see if that helps you get one last start out of it. I heard that can work in a pinch.

I think its your pump.. do you see fuel spraying from the injectors into the throttle body when you ( or someone) is starting it up?.. something is not flowing I think. how many miles?

 

[aweber]

give the gas tank a good thud with a rubber mallet and see if that helps you get one last start out of it. I heard that can work in a pinch.

I think its your pump.. do you see fuel spraying from the injectors into the throttle body when you ( or someone) is starting it up?.. something is not flowing I think. how many miles?

About 200,000 Kms - Fuel Pump is less than 1 year old, new plastic lines at the same time. Not sure if the Fuel Filter was ever changed though.

 

[treepete]

yeah, you want to replace the filter whenever you do a pump. they are about 10$
hmmm... 1 year old fuel pump..maybe filter... was fuel getting to the injectors?

 

[aweber]

yeah, you want to replace the filter whenever you do a pump. they are about 10$
hmmm... 1 year old fuel pump..maybe filter... was fuel getting to the injectors?

Finally got myself a fuel pressure tester. I am only getting 10 PSI.

Gonna change the Fuel Filter first and go from there to fuel pump.

 

[aweber]

Well, new pump and filter still getting 10PSI

Fuel Pressure Regulator?

 

[aweber]

Well, The symptoms where just not doing it for me when it came to the fuel pressure regulator, seemed to intermittent. So I can a ground from the battery to the frame and sure enough, 65PSI now...

So, Moral of the story, make sure your grounds are good before fawking around with the pump. :lol:

Thanks!