I'm running out of options FAST! Need help everyone I've asked has no clue


Asked by Apr 20, 2017 at 12:27 PM

Question type: Maintenance & Repair

I have a 99 Silverado 1500 5.3 I was driving down the
road when the motor cut out I got her to rev up a little bit
but it just killed it I go to start it and nothing but crank I
went out the next morning after getting towed home
started the truck fired for a second and died I've done
passlock relearn fuel filter egr maf no codes disconnected
the battery after doing the passlock relearn shell fire up to
1500 and die out I'll hit the key again and she'll fire I give it
some gas it comes up for a second and kills it I'm out of
ideas anything will help me at this point

6 Answers


Has anyone suggested to check the fuel pressure? And the oil light, was that on by chance?

1 people found this helpful.

I don't have a pressure gauge but I had my buddy crank the truck over and I opened the valve on the fuel rail and I'm getting fuel and no no oil light on I also did my fuel pump not even a year ago and that's up and running when I hit the key

1 people found this helpful.

If it were a security system problem it would not crank. Sounds like a dying fuel pump or you're out of gas due to the gauge not reading correctly. Try spraying some starting fluid down the throttle body and see if you can get it running for a little more time on that. If you can, it's a fuel problem. If not it's a no spark or weak spark problem. Are you due for a tune up? If you have over 100,000 miles on your truck and don't know if or when it's been tuned up last that may be the problem. BTW, the "passlock relearn procedure" will only work under very specific circumstances and as part of a security system repair. So don't waste your time. But as I said if it were the security system it wouldn't crank at all. HTH. -Jim


Is there a possibility that my engine could be blown and still potentially starts and fires but just lacks compression it's got over 220k

1 people found this helpful.

If you have no compression it will just crank. It won't start or run at all. You need three basic things for the engine to run. Fuel, ignition (spark) and compression. To find out which is missing you need to do some checking. The starting fluid down the throttle body will tell you if you are missing fuel if it'll run on the starting fluid. If it won't run on the starting fluid you're missing either spark or compression. Check for spark first. If you have spark and fuel (the starting fluid) but it still won't run check for compression. If all cylinders test very low or zero it's jumped timing. At 220,000 miles a jumped timing chain is a real possibility. Not the end of the world, but not a cheap fix either. HTH. -Jim


i replaced the fuel pump after not even a year and she fired right up money pit

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