Need Help With Silverado Lack of Power, Hard Starts, etc.

[mriggs90]

Well I thought I would post this in case someone else ever has the same problem. With my fuel gauge not working right all the time, and a pretty good probability of the check valve in the pump being bad, I finally broke down and bought a new fuel pump. This completely solved my problem. No more hard starts. It's great to have my truck back.
Thanks for all the help.

[j cAT]

Originally Posted by mriggs90

Well I thought I would post this in case someone else ever has the same problem. With my fuel gauge not working right all the time, and a pretty good probability of the check valve in the pump being bad, I finally broke down and bought a new fuel pump. This completely solved my problem. No more hard starts. It's great to have my truck back.
Thanks for all the help.

thanks for the posting on your fix.
what manufacturer did you use on the pump ? also did you drop the fuel tank or slide back the truck bed for access ?

[mriggs90]

I read on here that some of the aftermarket peices, even though they were cheaper did not last, so I went with the Delphi pump. Apparently they had made some improvements with my model, and I had to change the end of one of the wiring harnesses. I dropped the tank, just because I figured it would be easier. Oh, and note to anyone who ever does this by themself...make sure to clean around the old fuel pump before you take it out. I made this stupid mistake on mine, and knocked dirt and rust from around the locking ring into the tank, so I had to clean the tank before I installed the new pump.

[Bob B]

[quote=ColoradoSilverado;6105262]Fuel Pump! Don't buy the $300 Delphi piece of crap! I got a pump off Ebay for $45, works just fine!

Bert

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You must be the guy selling the pumps on ebay because they might last 3-6 months if you are lucky.
I went through 3 in two years and last time I put in a Delphi as I insisted on buying AC Delco.
It has been working for 2 years now.
The mechanics all insist on Delco (delphi).

Also only expensive at the dealers.
At a NAPA or etc, around $100.
Bob

[daarrve]

[quote=old_master;6120023] With the engine at idle, he unplugged the vacuum line at the fuel pressure regulator.quote]

On that note, can you please tell me what is supposed to happen when I unplug the vacuum line?, because when I unplug mine, nothing happens.

[mriggs90]

When you unplug the vaccum line ot the FPR, the fuel pressure should shoot up a little bit (5-10 psi according to one site that was not vehicle specific). According to that same site, which I haven't posted because I don't know if that is against the forum's rules, if the pressure does not increase when the vaccum line is disconnected the regulator is bad. Before you go and spend the money though, you might want to wait for additional responses to make sure this is correct. I'm pretty sure, but as someone on a tight budget, I would want confirmation before spending the money.

[old_master]

That's correct, the pressure should rise to whatever the fuel pressure reading is with the key on and the engine off. If it does not rise, it could be a faulty regulator, it could also be there is no vacuum on the line when the engine is at idle, it's also possible the pump is weak and can't satisfy the regulator. The fuel pump should be able to build around 108psi but, the highest pressure you'll see at the test port is with the key on and engine off.

[ColoradoSilverado]

[quote=Bob B;6437122]

Originally Posted by ColoradoSilverado

Fuel Pump! Don't buy the $300 Delphi piece of crap! I got a pump off Ebay for $45, works just fine!

Bert

------------------------------------------------------------
You must be the guy selling the pumps on ebay because they might last 3-6 months if you are lucky.
I went through 3 in two years and last time I put in a Delphi as I insisted on buying AC Delco.
It has been working for 2 years now.
The mechanics all insist on Delco (delphi).

Also only expensive at the dealers.
At a NAPA or etc, around $100.
Bob

No, I'm not selling fuel pumps on Ebay. For your information...the first pump i bought was a Delphi over $300 at Napa that lasted 13 months just a month past the warranty that's why i didn't want to spend another $300 on a pump! All you gys with your "buy OEM crap" just a waste of money! My truck is doing just fine with "cheaper" parts, I'm at 203K now and this is a work truck, haulin a ton or dirt or rocks or towing 10K! Just my 2 cents!

[old_master]

I agree, that's a lot of money for a Delphi pump when you can get an AC Delco online for half of that. Sometimes you don't have the luxury of being able to wait a couple of days for a pump though. Not standing behind it 1 month out of warranty really sucks. Two good reasons why I stay away from NAPA.