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1999 5.3 Engine Problems

casper98

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casper98 Enthusiast

casper98

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Have a 1999 5.3 4x4 that starts every once in a while, runs rough at idle then dies about 15 seconds after starting. Yesterday on the way to work as I was driving it felt like it was losing power and when I punched the gas the engine rpm's would go up but it wouldn't go. I had the tranny rebuilt about a year ago with new internals. When I was coming home from work it just started sputtering and crapping out on me and finally died. Since then I have tried to start it several times and occasionally it will start and run rough for like 15 seconds and then it dies. After about two or three starts like this it won't start again for a couple of hours. What could be the cause of this, its getting fuel and spark, any ideas would be appreciated.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
Have a 1999 5.3 4x4 that starts every once in a while, runs rough at idle then dies about 15 seconds after starting. Yesterday on the way to work as I was driving it felt like it was losing power and when I punched the gas the engine rpm's would go up but it wouldn't go. I had the tranny rebuilt about a year ago with new internals. When I was coming home from work it just started sputtering and crapping out on me and finally died. Since then I have tried to start it several times and occasionally it will start and run rough for like 15 seconds and then it dies. After about two or three starts like this it won't start again for a couple of hours. What could be the cause of this, its getting fuel and spark, any ideas would be appreciated.

 

Have you checked the fuel pressure?

casper98 Enthusiast

casper98

Posted
  • Author
Posted
Have a 1999 5.3 4x4 that starts every once in a while, runs rough at idle then dies about 15 seconds after starting. Yesterday on the way to work as I was driving it felt like it was losing power and when I punched the gas the engine rpm's would go up but it wouldn't go. I had the tranny rebuilt about a year ago with new internals. When I was coming home from work it just started sputtering and crapping out on me and finally died. Since then I have tried to start it several times and occasionally it will start and run rough for like 15 seconds and then it dies. After about two or three starts like this it won't start again for a couple of hours. What could be the cause of this, its getting fuel and spark, any ideas would be appreciated.

 

Have you checked the fuel pressure?

 

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
I dont have a fuel pressure gauge, but i did press on the valve and only a dribble of gas came out, it did not spray.

 

First thing I would do is go borrow or buy a fuel pressure tester. Could be the pump, regulator or clogged fuel filter. If you've never replaced the pump before though that's where I'm putting my money. Good luck.

casper98 Enthusiast

casper98

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I dont have a fuel pressure gauge, but i did press on the valve and only a dribble of gas came out, it did not spray.

 

First thing I would do is go borrow or buy a fuel pressure tester. Could be the pump, regulator or clogged fuel filter. If you've never replaced the pump before though that's where I'm putting my money. Good luck.

 

casper98 Enthusiast

casper98

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Sorry for the doule posts, I don't know why I keep doing it. Replaced the fuel filter and regulator and still doing the same problem. Does this mean that it is the fuel pump?

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
Sorry for the doule posts, I don't know why I keep doing it. Replaced the fuel filter and regulator and still doing the same problem. Does this mean that it is the fuel pump?

 

Some of your local auto parts stores will loan you the equipment to check your fuel pressure. I'd definitely check that before jumping into changing the pump....but it's definitely looking like that could be your problem.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
Thanks for everyones help, replaced the regulator and fuel filter, then replaced the fuel pump and all is well.

 

Glad you got it fixed....and quickly too.

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