I have a 1994 Camaro Z28 A4 with 98K miles...........i took it to the track and ran the car 7 times on a friday and it didnt brake down at all. then i drove it all day saturday with no problems.......sunday i drove 8 hours from the bay area to San diego....the car drove fine the whole way home.......then when i got home i got out while the car was running and heard a like grinding noise from the front of the motor that would come and go.....monday morning while driving to work i was cruising like 45mph and the car sounded like it backfired and then it did it one more time before the car shut itself down.......i checked the everything so i started the car and babied it back home....i checked it later that night and it has a real rough idle and if you rev in up it sounds like this loud backfire.....now the car wont start it just kicks over and thats it.....could it be my timing chain? has anyone ever stretched a timing chain out and got the same problems i have or could it be something else....please help. here is the video when the car was acting up

http://vids.myspace.com/index.cfm?fu...=760449479&n=2

 

I have never heard a Timing Chain stretch...

 

Sounds to me that the OPTI took a ****. The noise You're hearing is probably the the rotor hitting the cap. Mine did the exact same thing. Take the OPTI out and turn the rotor by hand, it should turn freely and not make any noise, also shake the OPTI and make sure there isn't any loose **** rattling around. I can almost guarantee that is Your problem. Keep us updated.

 

i will keep everyone posted as soon as i get the time to work on the car.......also i dont think its the opti i think its the chain cause the car is eating oil not real bad but it is and it never did that before this happened......i got video of what the car sounded like when this happened here it is.

http://vids.myspace.com/index.cfm?fu...=760449479&n=2\

what do you think. i thought it was a trown rod

 

Definatly not a thrown rod. That grinding noise is worse than You explained. Good luck.

 

sounds like opti to me, one other person had something happen with their timing chain but it was the only time i'd heard it happen and he was on z28.com