2002 Surburban will not start.

[electro]

Everything was fine, truck always starting strong etc. Wake up this morning as normal go to start truck, listen for fuel pump (habit now, you know). Sounds as normal for a crank or two and then nothing. Let off key, pump primes again, try to start and it just keeps cranking.


I used amprobe to measure plug wires and it would appear coils are receiving voltage.

All fuses test good. Did not test relays.

Did not test fuel pressure. Will have to wait till tomorrow to get a gauge.

I grabbed a fuel filter for fun. Seeing as I did not have a gauge, I was going to eyeball the flow before and after filter.

3/16th fuel in tank.

What is going on?



---------- Post added at 09:49 PM ---------- Previous post was at 08:13 PM ----------

Passlock?

 

[electro]

I haven't done anything with fuel system as I can hear pump priming.


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[ccapehartusarmyINF.(ret)]

3/16ths not exactly sure what that is on the fuel guage im assuming its on E
ive got a 2002 tahoe and when i park mine empty and it sits for like a day i have a hard time getting in to start and if the tanks really empty i gotta dump my lawnmower gas in it before itll start

 

[electro]

3/16ths is 1/16th more than 1/8th and 1/16th less than 1/4.

It was sitting at 1/8th tank and I put a little gas in to move the gauge slightly to check it.


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---------- Post added at 06:04 PM ---------- Previous post was at 06:03 PM ----------

Got gauge, going to test pressure at fuel rail.

Need to eat yummy Turkey left overs first.


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---------- Post added at 06:14 PM ---------- Previous post was at 06:04 PM ----------

I'm not observing any security lights unless door is open key is out.

When the key is in and turned to on position I just see solid battery light.


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---------- Post added at 07:44 PM ---------- Previous post was at 06:14 PM ----------

It would appear, I have zero fuel pressure at the rail.

Where to go from here?

I can hear pump priming still.


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[Physh1]

Do you have fuel @ the rail? I'd throw some gas in there & see what happens.

Pull a plug...it is wet with fuel?

Cameron

 

[ccapehartusarmyINF.(ret)]

i would say yer fuel pump kicked the bucket has it been replaced before
and just becuase you can here it primiing doesnt mean its not bad

 

[electro]

If I can hear it running it must be... Running.

I will pull fuel lines apart tomorrow and see.


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[Physh1]

If I can hear it running it must be... Running.

I will pull fuel lines apart tomorrow and see.


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Unfortunately running doesn't mean enough pressure. Check fuel pressure, check for wet plugs, make sure FPR isn't leaking...

Cameron

 

[ccapehartusarmyINF.(ret)]

you could hear mine running mine started on the 3 or 4th try though i replaced before it got to the point of no starting at all

 

[electro]

I have zero fuel pressure. I'm going to test the pressure gauge on another vehicle.

Before or after that I'm going to take supply line apart at filter and see what the flow is like there.


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---------- Post added at 12:46 PM ---------- Previous post was at 12:37 PM ----------

Fuel pressure regulator is something I will look at.

Possibly remove it and check the screen for obstructions.


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[electro]

Sooo... I smacked the pump. Running again.


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[electro]

The pump was making noise in the tank but not actually pumping fuel.

I few swift whacks with a pipe bender and voila

I whacked it and then turned the key and listened for prime and then I could actually hear the fuel rushing down the line.


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[Physh1]

Keep a close eye on it...pump may be starting to kick the bucket...

 

[electro]

I agree.

But what can I do?

 

[clandr1]

I agree.

But what can I do?

Replace it before it dies completely.

 

[Physh1]

I agree.

But what can I do?

Replace it asap.

Cameron

 

[electro]

I need a better one. This is #2.

 

[Gzes]

Get a walbro pump

 

[ccapehartusarmyINF.(ret)]

yes replace it these factory gm pumps are destined to fail around the 100k to 150k range
really the only way to extend the life of yer fuel pump is to like never let your fuel tank fall below 1/2 tank roughly since its submerged

 

[Physh1]

Walbro pumps are nice...factory is fine but it's highly recommended not to go below 1/3 tank. Fuel is a coolant & lubricant for the pump. If you run your tank low...exposing the pump...it gets hot...you fill up dumping cool/cold fuel on a hot pump...stuff starts wearing out. It's the deatb of fuel pumps. Fords, Dodges, & GM's have this issue.

Cameron