dosdonkey

hello, i have a 2000 silverado with a 4.3 liter vortec and i got into a slight fender bender in which my ladder hit another car (our actual cars didnt touch) very slight not even a scratch, but as soon as i tried to leave the car ran very baddly its misfiring and the code it gives when tested is random cylinder misfire, it also dies at times now , previosuly i had no problems, does anybody know some things to try? I replaced the cap adn roter just this last year and found out it was actuall the ign. module and replaced it as well if that helps!

URLIFEWASOC

TRY REPLACEING THE SPARK PLUG AND WIRE FOR THE MISSFIRE. THIS WILL TAKE SOME TIME. SWAP THE SPARK PLUG FIRST WITH ANOTHER ONE. THEN GO BACK AND PULL THE CODE AND SEE IF IT IS THE SAME ONE THAT IS MISSFIRING. IF IT IS THEN ITS NOT THE SPARK PLUG. AFTER THAT CHANGE THE SPARK PLUG WIRE. THEN PULL THE CODE AGAIN AND IF ITS THE SAME THEN IT WILL MOST LIKELY BE THE COIL. IF. DO YOU KNOW WHICH CYCLINDER IS MISSFIRING? WHAT CODE IS IT? ON THE 2000 SILVERADO DONT THEY HAVE INDEPENDENT COILS?

dosdonkey

it doesnt give me a specific cylinder it just says random missfire, and it doenst apper to have independent coils it has one big coils that runs into the distributor, if that helps

777stickman

That's weird!! everything today is computer controlled. When in doubt, reboot the computer. Disconnect the NEG batt cable over night and see what happens. Let us know..........

dosdonkey

well that was the first thing i tried, ive also cleaned the egr valve and that didnt help, could it possibly be a bad injector? how could i test for that? and how can u test the coil, or possibly the ignotion module?

HanibalTheCannibal

someone hit a ladder you had in the back of the truck? And now your truck runs wierd?

__________________
2001 5.3 LS Tow Group
6 channel Alpine 3566 Amp
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dosdonkey

yeah they rearended me, my ladder was sticking out so thats allthey hit, but it could be just cocinidental, maybe not who knows

pkbfree

The ladder has got to be coincidence. Random fire failure indicates electronic problems or fuel line problems. If you have not run into this:
- Check fuel pressure with a tester. The fuel pressure regulator commonly breaks. It's easy to replace yourself.
- Fuel filter? Once the filter has had it, you get this symptom. If you haven't replaced it in a while, go ahead. Easy DIY.
- Distributor: Not sure what type of distributor you have. Check it out too. I owned an old ford that had a cracked distributor housing. Every time it rained the thing wouldn't start!

Could you have a bad tank of gas?

dosdonkey

well the gas is fine, i had replaced the distrubutor and fuel filter jsut this past summer, i took it in to the shop todya and they said that a spark plug had short circuited the distrubitor? ive never heard of that what do u think? and they also said the fuel filter needed replaced but that was just replaced so i dont know if they are jerking me around?

pkbfree

So the distributor is gone? How would a plug cause that?
If they are telling you to replace the distributor, you might see if the part had a warranty. Maybe try replacing one part at a time and see what works. Sorry, I'm out of ideas.

dosdonkey

i know its crazy isnt it! " a plug shorted out your cap and rotor" thats what he said and you need to replace the fuel filter when i told him i did it last summer he couldnt think of anyting to say!