Changed plugs and coil pack and it is still running sluggishly.
Dec 16, 2021 at 10:50 PM
Service engine light flashing, engine is losing pressure, vibrating, and misfiring
2001 BUICK LESABRE
HOPE FULLER
- MEMBER
- 1 POST
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Good morning,
I would start by checking the compression in the motor to be sure there is no issue internally. You need 140-160 pounds in each cylinder.
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
https://www.2carpros.com/articles/how-to-test-engine-compression
Then I would check the fuel pressure to be sure there is sufficient fuel in the injectors.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Check for the spark to all the cylinders as well.
https://www.2carpros.com/articles/how-to-test-an-ignition-system
Let me know the results and when we have it narrowed down, we can pinpoint the failure.
Roy
I would start by checking the compression in the motor to be sure there is no issue internally. You need 140-160 pounds in each cylinder.
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
https://www.2carpros.com/articles/how-to-test-engine-compression
Then I would check the fuel pressure to be sure there is sufficient fuel in the injectors.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Check for the spark to all the cylinders as well.
https://www.2carpros.com/articles/how-to-test-an-ignition-system
Let me know the results and when we have it narrowed down, we can pinpoint the failure.
Roy
Dec 16, 2021 at 11:35 PM
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