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Old October 27th, 2009, 04:04 PM   #1
stoke2te
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Default 99 5.3 Silverado Won't Fire

About 3 days ago i started my truck up like normal, truck idled fine. As soon as I put it into gear I noticed that the truck was running like hell, but as soon as I got up to about 10mph it went away, and after it warmed up it was fine.

The next day it did the same thing in the morning, and then when leaving school in the afternoon it was running rough, I would lay into the throttle and it wouldn't do anything, as if it was starving for gas?

Well this morning when I started it up it did the same thing, and about 3 miles down the road from my house it finally started chugging and died. Sat on the side of the road for a couple of minutes, tried starting, would kind of start up, and finally just wouldn't. I've been at school and work all day so it's still sitting there.

I have yet to get back and actually take a look at it. The first thing I'm going to do is pull a couple of plugs and check for spark. Any body have any issues like this before? If it does have spark, does anyone have any suggestions for testing the fuel pump? Anyone have any resistance specs for the pump?
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Old October 27th, 2009, 04:05 PM   #2
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check your egr valve i was having that issue with mine and that is what it needed. does it have a check engine light on?
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Old October 27th, 2009, 04:11 PM   #3
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i forgot to mention I do not have an EGR valve, the previous owner of the truck had removed it to install true duals w/o dummy o2's, the check engine is constantly on
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Old October 27th, 2009, 04:15 PM   #4
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go get it scanned
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Old October 27th, 2009, 04:52 PM   #5
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check for fuel pressure, my bet is your filter is either really really plugged or your fuel pump took a shit.

you should have 52-60 psi at the rail. easiest way to check it is to remove the cap on the end of the fuel rail, install the gauge and cycle the ignition but dont start it. it should hold pressure in the rail so you dont have to worry about reading it as the pump is on but it never hurts.
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Old October 27th, 2009, 04:54 PM   #6
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Quote:
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check for fuel pressure, my bet is your filter is either really really plugged or your fuel pump took a shit.

you should have 52-60 psi at the rail. easiest way to check it is to remove the cap on the end of the fuel rail, install the gauge and cycle the ignition but dont start it. it should hold pressure in the rail so you dont have to worry about reading it as the pump is on but it never hurts.
thanks for the info man, doubtful the filter is plugged, i just recently swapped it with a new one about 2 months ago
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Old October 27th, 2009, 04:55 PM   #7
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go get it scanned

that's hard to do when it won't move and i'm 20 miles from any shop
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Old October 27th, 2009, 05:26 PM   #8
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You can borrow a scanner from the parts store? We can around here.
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Old October 27th, 2009, 07:10 PM   #9
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i'd pull the intake off the throttle body and see if it will fire off some carb cleaner. if it will start then you know you have a fuel delivery issue
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Old October 27th, 2009, 07:31 PM   #10
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fuel pump!!! i work at a shop and do at least 2 of these every week on these trucks!!!
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Old October 28th, 2009, 10:27 AM   #11
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I did the fuel pump on my '99 silverado last year, it took 2 hours to pull the bed and 10 minutes to change the pump and bolt it back together (with anti-sieze on all the bolts)
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Old October 28th, 2009, 12:50 PM   #12
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have you guys had good luck with the cheaper "airtex" pumps as opposed to the delco's? i pulled the tank last night, and plan on putting the pump in tonite after work.
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Old October 28th, 2009, 05:58 PM   #13
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have you guys had good luck with the cheaper "airtex" pumps as opposed to the delco's? i pulled the tank last night, and plan on putting the pump in tonite after work.
Not sure about the airtex, but some parts stores carey the delco's at better prices than others.

I would probably spring for the delco?? I hate fuel pump problems.
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Old October 28th, 2009, 06:01 PM   #14
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i bought one from the dealer (which i have a friend that works there so i got a good deal) mine made a loud whine for 100k before it went out.
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