Buick LeSabre engine shut down issue with slow crank despite new harmonic balancer on Buick LeSabre

Some Buick LeSabre owners report experiencing engine shutdown issues despite a slow crank, even after replacing the harmonic balancer. These problems may be attributed to a faulty crankshaft position sensor, which can lead to unexpected engine stalling. Additionally, issues with electrical connections, such as loose contacts in the fuse box, are reported to cause problems, particularly under higher current loads. Other sensors, including the MAF sensor, can also contribute to stalling issues in these models. Furthermore, complications within the fuel system, including the fuel pump and fuel lines, may persist even after replacements. Owners should also consider checking the starting system components, such as the ignition module and idle control sensor. Finally, ensuring the battery is in good condition and inspecting relays for loose connections are crucial steps to prevent starting and running issues. Addressing these potential causes systematically is essential for diagnosing and resolving engine shutdown problems in the Buick LeSabre.