Question about 1999 Saturn SL

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Car wont start

After my car stalled out on the interstate when i was going 70mph. it wont start now. the fuel pump is working. ive replaced the fuel filter and spark plugs. the engine turns over and tries to start but its not firing car stalled out while pulling out on the highway the check engine light came on. auto zone said that the fuel was too rich i purchased fuel injector cleaner on their advice refilled tank with highger octane gas wich didnt fix the problem. replaced plugs and wires still didnt fix the problem. napa said it was the fuel injectors, so after replacing those now it wont even start.

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At first, I thought 'coil pack'. But you said it tried to start. So that's out. You might check that you're getting spark just to be thorough.

Did it ever start again after the stall on the interstate?

If not, I'm leaning towards the timing chain.

What happens if your timing chain broke:

  • The timing chain no longer turns the cam(s)
  • The cam(s) no longer open/close the valves
  • The valves become stationary, remaining open or closed depending on the position of the cam(s)
  • If even one valve is open in a cylinder, no compression.
  • No compression, no start.
How do you confirm this without tearing apart your engine?

Do a compression test on all cylinders. If only one or two have compression (or one or more have zero compression), I'm tipping over towards the timing chain.

Have a compression test done.

Hope this helps


Posted on Jul 17, 2008


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