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Discussion Starter #1
I have a 1998 k1500 ext cab Z71 with the 5.7L and i have had the truck for about 5 months. it has started up strong every time i have started it. then today i go outside to go to work and i try to start my truck and my truck starts then like a second later it dies. i tried to start it a couple times more and it would start and die. maybe it could be a bad fuel filter? Any help is appreciated!! Thanks
 

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Can you here the fuel pump turn on when you first turn the ket key to the accessory position? It should run for 2-3 seconds then shut off. Did you just fill the tank full? Try banging on the bottom of the fuel tank with a rubber mallet and see if it starts then. If it does fuel pump is on its last legs. time to drop the tank.
 
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Well, we should probably start with a few basics first...

Given that it is a '98, there most likely are a few miles on it. Guessing around 160,000.

With it being new to you just 5 months ago, we can count on it needing some TLC.

If you have already done some of the following, you'll be ahead of the game.

So, what I would do is clean off the TBI and IAC sensor with TBI cleaner (not carb cleaner).

Change out the Fuel filter, and air filter while your at it.

Unplug and clean all of the Electronic sensor connectors, one at a time.

Clean off the Battery connections and the ground to frame connection.

A new set of wires will help to over come any unnecessary arking our added reistance to the spark.

New spark plugs for sure.

And a new rotor and Cap for the distributor.

Pretty cheap investment for reliability.

Most likely your current issue is the Cap and Rotor have some wear on them.

Next plan out what kind of usage you will be getting out of your truck, daily driver, hauling a trailer, off road trails...

If you don't want to get stranded, a new distributor may be on the horizon. As well as a new Coil.

These few things will get you down the road for many more miles.
 

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Discussion Starter #4
A I need to do all of that and I haven't changed any of that but I mean it's not getting enough fuel so it's starting then dying. Most likely it's a clog fuel filter cause who knows when the guy has replaced that. My truck has 186,200 miles
 

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Discussion Starter #6
It's good now.. My truck started and drove it around the block then started it three more times. Hmm these trucks are weird lol my friends z71 truck did the same thing last friday
 

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Discussion Starter #7
A when I turn the key over I hear the fuel pump c
come on for like 2-3 sec and yes I did fill up yesterday. I wonder if that had anything to do with it..? Thanks for all the help guys
 

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My husband and I are having this same issue. It starts then dies immediately. Parts replaced so far: fuel pump, fuel filter, spider injectors, fuel regulator, oil pressure switch, ignition switch, ignition module, passlock, fuel pump relay, spark plugs, wires, distributor cap, rotor and ignition coil. Crank sensor is getting power and 50 psi with key in the on position (not running). Any ideas?
 

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I have one word STOP.

Put some time into diagnosing the problem you'll save time and money.

I'm just popping in while I wait to eat, I'll be back later to fully read your posts and try to help. Others will be in here as well.
 

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I have one word STOP.

Put some time into diagnosing the problem you'll save time and money.

I'm just popping in while I wait to eat, I'll be back later to fully read your posts and try to help. Others will be in here as well.

We've been trying to diagnose the problem. This is week two now. We've had 4 mechanics look at it as well. We're running out of time. Everyone is stumped on this one. Looking for suggestions on where to look next. Thank you. Enjoy your meal.
 

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Is it 50 psi all the time? Fuel pressure should be close to 60psi bare minimum key on engine off for it to start. 65psi would be better.
 

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Ok, first toss your vehicle information at us.

The security system should let the engine run for about 10 secs, then, depending on the vehicle, both spark and fuel will be cut off.
How long will yours run?

Also think the padlock symbol should be lite if it's the security system.
 

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Security light not on. Truck dies immediately after starting. No codes. Sparking fine, plugs and wires are brand new as well as distributor cap and rotor.

We rented the fuel pressure gauge. Turned the key on and got 50 psi. It's pouring rain right now, and will be into the night, so won't be able to check that again till the morning.
 

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fuel pressure? when did check on my 5.7 went to 5 lbs then bled off. my pump took awhile to wear out almost to the point it wasn't even noticeable. went looking for other things then came back to fuel pump having been in denial for pulling the tank. a lot of things I never did till the first. runs great...and everything else associated with fuel pressure works too. who would have thought?
 

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Sam, we still need the vehicle info
 
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