Cranks but will not start

2004 OLDSMOBILE ALERO
190,000 MILES • 3.4L • 6 CYL • 2WD • AUTOMATIC
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ERICSNYDER011
  • MEMBER
  • 2 POSTS
I have crank but i have no spark. changed ECM, coil packs, etc.
Mar 24, 2020 at 5:57 AM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good morning,

You need fuel, spark and compression for it to run.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Did you check the fuel pressure? Can you hear the fuel pump run?

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Did you check for spark? Check at the spark plug while cranking.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Did you check for compression?

https://www.2carpros.com/articles/how-to-test-engine-compression

Did you have your replacement ECM programmed to your VIN number?

Roy
Mar 24, 2020 at 6:06 AM
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ERICSNYDER011
  • MEMBER
  • 2 POSTS
I have done all but program the ECM to my VIN wasn't sure you had to.
Mar 25, 2020 at 9:32 PM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
Yes, you must for it to operate correctly.

What were the results of all the tests I suggested?

Roy
Mar 26, 2020 at 4:49 AM