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Ron, ASE Certified Technician
Category: Buick
Satisfied Customers: 35628
Experience:  34 years as a Tech
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2000 Buick Lesabre, intermittent miss and tach fluctuation.

Customer Question

2000 Buick Lesabre, intermittent miss and tach fluctuation . coded # ***** misfire. replaced coil pack. Still did it. replaced circuit board under coils. Still did it. replaced crank sensor. Still intermittent misfires and tach not steady.
Submitted: 1 year ago.
Category: Buick
Expert:  Ron replied 1 year ago.

Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

If the tachometer is fluctuating I would start with taking a look at the crankshaft position signal while the problem is occurring. See the test steps in the link below, copy and paste the link to your browser to open and view them.